gnu: qemu: Update to 2.4.0.1. Include fix for CVE-2015-6855.

* gnu/packages/patches/qemu-CVE-2015-3209.patch,
  gnu/packages/patches/qemu-CVE-2015-4037.patch,
  gnu/packages/patches/qemu-CVE-2015-4103.patch,
  gnu/packages/patches/qemu-CVE-2015-4104.patch,
  gnu/packages/patches/qemu-CVE-2015-4105.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt1.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt3.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt4.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt5.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt6.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt7.patch,
  gnu/packages/patches/qemu-CVE-2015-4106-pt8.patch,
  gnu/packages/patches/qemu-CVE-2015-5745.patch: Delete files.
* gnu/packages/patches/qemu-CVE-2015-6855.patch: New file.
* gnu-system.am (dist_patch_DATA): Add the new patch and delete the old ones.
* gnu/packages/qemu.scm (qemu-headless): Update to 2.4.0.1.  Add the new patch
  and delete the old ones.

16 files changed, 147 insertions, 1331 deletions

diff --git a/gnu/packages/patches/qemu-CVE-2015-3209.patch b/gnu/packages/patches/qemu-CVE-2015-3209.patch
deleted file mode 100644
index 0bb726698c..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-3209.patch
+++ /dev/null
@@ -1,49 +0,0 @@
-From 9f7c594c006289ad41169b854d70f5da6e400a2a Mon Sep 17 00:00:00 2001
-From: Petr Matousek <pmatouse@redhat.com>
-Date: Sun, 24 May 2015 10:53:44 +0200
-Subject: [PATCH] pcnet: force the buffer access to be in bounds during tx
-
-4096 is the maximum length per TMD and it is also currently the size of
-the relay buffer pcnet driver uses for sending the packet data to QEMU
-for further processing. With packet spanning multiple TMDs it can
-happen that the overall packet size will be bigger than sizeof(buffer),
-which results in memory corruption.
-
-Fix this by only allowing to queue maximum sizeof(buffer) bytes.
-
-This is CVE-2015-3209.
-
-[Fixed 3-space indentation to QEMU's 4-space coding standard.
---Stefan]
-
-Signed-off-by: Petr Matousek <pmatouse@redhat.com>
-Reported-by: Matt Tait <matttait@google.com>
-Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
-Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
-Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
----
- hw/net/pcnet.c | 8 ++++++++
- 1 file changed, 8 insertions(+)
-
-diff --git a/hw/net/pcnet.c b/hw/net/pcnet.c
-index bdfd38f..68b9981 100644
---- a/hw/net/pcnet.c
-+++ b/hw/net/pcnet.c
-@@ -1241,6 +1241,14 @@ static void pcnet_transmit(PCNetState *s)
-         }
- 
-         bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
-+
-+        /* if multi-tmd packet outsizes s->buffer then skip it silently.
-+           Note: this is not what real hw does */
-+        if (s->xmit_pos + bcnt > sizeof(s->buffer)) {
-+            s->xmit_pos = -1;
-+            goto txdone;
-+        }
-+
-         s->phys_mem_read(s->dma_opaque, PHYSADDR(s, tmd.tbadr),
-                          s->buffer + s->xmit_pos, bcnt, CSR_BSWP(s));
-         s->xmit_pos += bcnt;
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4037.patch b/gnu/packages/patches/qemu-CVE-2015-4037.patch
deleted file mode 100644
index 305036b9f2..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4037.patch
+++ /dev/null
@@ -1,53 +0,0 @@
-From 8b8f1c7e9ddb2e88a144638f6527bf70e32343e3 Mon Sep 17 00:00:00 2001
-From: Michael Tokarev <mjt@tls.msk.ru>
-Date: Thu, 28 May 2015 14:12:26 +0300
-Subject: [PATCH] slirp: use less predictable directory name in /tmp for smb
- config (CVE-2015-4037)
-
-In this version I used mkdtemp(3) which is:
-
-        _BSD_SOURCE
-        || /* Since glibc 2.10: */
-            (_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)
-
-(POSIX.1-2008), so should be available on systems we care about.
-
-While at it, reset the resulting directory name within smb structure
-on error so cleanup function wont try to remove directory which we
-failed to create.
-
-Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
-Reviewed-by: Markus Armbruster <armbru@redhat.com>
----
- net/slirp.c | 7 +++----
- 1 file changed, 3 insertions(+), 4 deletions(-)
-
-diff --git a/net/slirp.c b/net/slirp.c
-index 0e15cf6..3533837 100644
---- a/net/slirp.c
-+++ b/net/slirp.c
-@@ -481,7 +481,6 @@ static void slirp_smb_cleanup(SlirpState *s)
- static int slirp_smb(SlirpState* s, const char *exported_dir,
-                      struct in_addr vserver_addr)
- {
--    static int instance;
-     char smb_conf[128];
-     char smb_cmdline[128];
-     struct passwd *passwd;
-@@ -505,10 +504,10 @@ static int slirp_smb(SlirpState* s, const char *exported_dir,
-         return -1;
-     }
- 
--    snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
--             (long)getpid(), instance++);
--    if (mkdir(s->smb_dir, 0700) < 0) {
-+    snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.XXXXXX");
-+    if (!mkdtemp(s->smb_dir)) {
-         error_report("could not create samba server dir '%s'", s->smb_dir);
-+        s->smb_dir[0] = 0;
-         return -1;
-     }
-     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4103.patch b/gnu/packages/patches/qemu-CVE-2015-4103.patch
deleted file mode 100644
index 74333fd672..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4103.patch
+++ /dev/null
@@ -1,135 +0,0 @@
-From 5c83b2f5b4b956e91dd6e5711f14df7ab800aefb Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:00 +0000
-Subject: [PATCH] xen: properly gate host writes of modified PCI CFG contents
-
-The old logic didn't work as intended when an access spanned multiple
-fields (for example a 32-bit access to the location of the MSI Message
-Data field with the high 16 bits not being covered by any known field).
-Remove it and derive which fields not to write to from the accessed
-fields' emulation masks: When they're all ones, there's no point in
-doing any host write.
-
-This fixes a secondary issue at once: We obviously shouldn't make any
-host write attempt when already the host read failed.
-
-This is XSA-128.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
----
- hw/xen/xen_pt.c             | 25 +++++++++++++++++++++----
- hw/xen/xen_pt.h             |  2 --
- hw/xen/xen_pt_config_init.c |  4 ----
- 3 files changed, 21 insertions(+), 10 deletions(-)
-
-diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
-index d095c08..8923582 100644
---- a/hw/xen/xen_pt.c
-+++ b/hw/xen/xen_pt.c
-@@ -234,7 +234,7 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
-     int index = 0;
-     XenPTRegGroup *reg_grp_entry = NULL;
-     int rc = 0;
--    uint32_t read_val = 0;
-+    uint32_t read_val = 0, wb_mask;
-     int emul_len = 0;
-     XenPTReg *reg_entry = NULL;
-     uint32_t find_addr = addr;
-@@ -271,6 +271,9 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
-     if (rc < 0) {
-         XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc);
-         memset(&read_val, 0xff, len);
-+        wb_mask = 0;
-+    } else {
-+        wb_mask = 0xFFFFFFFF >> ((4 - len) << 3);
-     }
- 
-     /* pass directly to the real device for passthrough type register group */
-@@ -298,6 +301,11 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
- 
-             valid_mask <<= (find_addr - real_offset) << 3;
-             ptr_val = (uint8_t *)&val + (real_offset & 3);
-+            if (reg->emu_mask == (0xFFFFFFFF >> ((4 - reg->size) << 3))) {
-+                wb_mask &= ~((reg->emu_mask
-+                              >> ((find_addr - real_offset) << 3))
-+                             << ((len - emul_len) << 3));
-+            }
- 
-             /* do emulation based on register size */
-             switch (reg->size) {
-@@ -350,10 +358,19 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
-     memory_region_transaction_commit();
- 
- out:
--    if (!(reg && reg->no_wb)) {
-+    for (index = 0; wb_mask; index += len) {
-         /* unknown regs are passed through */
--        rc = xen_host_pci_set_block(&s->real_device, addr,
--                                    (uint8_t *)&val, len);
-+        while (!(wb_mask & 0xff)) {
-+            index++;
-+            wb_mask >>= 8;
-+        }
-+        len = 0;
-+        do {
-+            len++;
-+            wb_mask >>= 8;
-+        } while (wb_mask & 0xff);
-+        rc = xen_host_pci_set_block(&s->real_device, addr + index,
-+                                    (uint8_t *)&val + index, len);
- 
-         if (rc < 0) {
-             XEN_PT_ERR(d, "pci_write_block failed. return value: %d.\n", rc);
-diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h
-index 942dc60..52ceb85 100644
---- a/hw/xen/xen_pt.h
-+++ b/hw/xen/xen_pt.h
-@@ -105,8 +105,6 @@ struct XenPTRegInfo {
-     uint32_t ro_mask;
-     /* reg emulate field mask (ON:emu, OFF:passthrough) */
-     uint32_t emu_mask;
--    /* no write back allowed */
--    uint32_t no_wb;
-     xen_pt_conf_reg_init init;
-     /* read/write function pointer
-      * for double_word/word/byte size */
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 95a51db..dae0519 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -1279,7 +1279,6 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .init_val   = 0x00000000,
-         .ro_mask    = 0x00000003,
-         .emu_mask   = 0xFFFFFFFF,
--        .no_wb      = 1,
-         .init       = xen_pt_common_reg_init,
-         .u.dw.read  = xen_pt_long_reg_read,
-         .u.dw.write = xen_pt_msgaddr32_reg_write,
-@@ -1291,7 +1290,6 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .init_val   = 0x00000000,
-         .ro_mask    = 0x00000000,
-         .emu_mask   = 0xFFFFFFFF,
--        .no_wb      = 1,
-         .init       = xen_pt_msgaddr64_reg_init,
-         .u.dw.read  = xen_pt_long_reg_read,
-         .u.dw.write = xen_pt_msgaddr64_reg_write,
-@@ -1303,7 +1301,6 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .init_val   = 0x0000,
-         .ro_mask    = 0x0000,
-         .emu_mask   = 0xFFFF,
--        .no_wb      = 1,
-         .init       = xen_pt_msgdata_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_msgdata_reg_write,
-@@ -1315,7 +1312,6 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .init_val   = 0x0000,
-         .ro_mask    = 0x0000,
-         .emu_mask   = 0xFFFF,
--        .no_wb      = 1,
-         .init       = xen_pt_msgdata_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_msgdata_reg_write,
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4104.patch b/gnu/packages/patches/qemu-CVE-2015-4104.patch
deleted file mode 100644
index 811b0419a9..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4104.patch
+++ /dev/null
@@ -1,189 +0,0 @@
-From 7611dae8a69f0f1775ba1a9a942961c2aa10d88e Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:00 +0000
-Subject: [PATCH] xen: don't allow guest to control MSI mask register
-
-It's being used by the hypervisor. For now simply mimic a device not
-capable of masking, and fully emulate any accesses a guest may issue
-nevertheless as simple reads/writes without side effects.
-
-This is XSA-129.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
----
- hw/pci/msi.c                |  4 --
- hw/xen/xen_pt_config_init.c | 98 ++++++++++++++++++++++++++++++++++++++++-----
- include/hw/pci/pci_regs.h   |  2 +
- 3 files changed, 90 insertions(+), 14 deletions(-)
-
-diff --git a/hw/pci/msi.c b/hw/pci/msi.c
-index c111dba..f9c0484 100644
---- a/hw/pci/msi.c
-+++ b/hw/pci/msi.c
-@@ -21,10 +21,6 @@
- #include "hw/pci/msi.h"
- #include "qemu/range.h"
- 
--/* Eventually those constants should go to Linux pci_regs.h */
--#define PCI_MSI_PENDING_32      0x10
--#define PCI_MSI_PENDING_64      0x14
--
- /* PCI_MSI_ADDRESS_LO */
- #define PCI_MSI_ADDRESS_LO_MASK         (~0x3)
- 
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index dae0519..68b8f22 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -1016,13 +1016,9 @@ static XenPTRegInfo xen_pt_emu_reg_pm[] = {
-  */
- 
- /* Helper */
--static bool xen_pt_msgdata_check_type(uint32_t offset, uint16_t flags)
--{
--    /* check the offset whether matches the type or not */
--    bool is_32 = (offset == PCI_MSI_DATA_32) && !(flags & PCI_MSI_FLAGS_64BIT);
--    bool is_64 = (offset == PCI_MSI_DATA_64) &&  (flags & PCI_MSI_FLAGS_64BIT);
--    return is_32 || is_64;
--}
-+#define xen_pt_msi_check_type(offset, flags, what) \
-+        ((offset) == ((flags) & PCI_MSI_FLAGS_64BIT ? \
-+                      PCI_MSI_##what##_64 : PCI_MSI_##what##_32))
- 
- /* Message Control register */
- static int xen_pt_msgctrl_reg_init(XenPCIPassthroughState *s,
-@@ -1134,7 +1130,45 @@ static int xen_pt_msgdata_reg_init(XenPCIPassthroughState *s,
-     uint32_t offset = reg->offset;
- 
-     /* check the offset whether matches the type or not */
--    if (xen_pt_msgdata_check_type(offset, flags)) {
-+    if (xen_pt_msi_check_type(offset, flags, DATA)) {
-+        *data = reg->init_val;
-+    } else {
-+        *data = XEN_PT_INVALID_REG;
-+    }
-+    return 0;
-+}
-+
-+/* this function will be called twice (for 32 bit and 64 bit type) */
-+/* initialize Mask register */
-+static int xen_pt_mask_reg_init(XenPCIPassthroughState *s,
-+                                XenPTRegInfo *reg, uint32_t real_offset,
-+                                uint32_t *data)
-+{
-+    uint32_t flags = s->msi->flags;
-+
-+    /* check the offset whether matches the type or not */
-+    if (!(flags & PCI_MSI_FLAGS_MASKBIT)) {
-+        *data = XEN_PT_INVALID_REG;
-+    } else if (xen_pt_msi_check_type(reg->offset, flags, MASK)) {
-+        *data = reg->init_val;
-+    } else {
-+        *data = XEN_PT_INVALID_REG;
-+    }
-+    return 0;
-+}
-+
-+/* this function will be called twice (for 32 bit and 64 bit type) */
-+/* initialize Pending register */
-+static int xen_pt_pending_reg_init(XenPCIPassthroughState *s,
-+                                   XenPTRegInfo *reg, uint32_t real_offset,
-+                                   uint32_t *data)
-+{
-+    uint32_t flags = s->msi->flags;
-+
-+    /* check the offset whether matches the type or not */
-+    if (!(flags & PCI_MSI_FLAGS_MASKBIT)) {
-+        *data = XEN_PT_INVALID_REG;
-+    } else if (xen_pt_msi_check_type(reg->offset, flags, PENDING)) {
-         *data = reg->init_val;
-     } else {
-         *data = XEN_PT_INVALID_REG;
-@@ -1222,7 +1256,7 @@ static int xen_pt_msgdata_reg_write(XenPCIPassthroughState *s,
-     uint32_t offset = reg->offset;
- 
-     /* check the offset whether matches the type or not */
--    if (!xen_pt_msgdata_check_type(offset, msi->flags)) {
-+    if (!xen_pt_msi_check_type(offset, msi->flags, DATA)) {
-         /* exit I/O emulator */
-         XEN_PT_ERR(&s->dev, "the offset does not match the 32/64 bit type!\n");
-         return -1;
-@@ -1267,7 +1301,7 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .size       = 2,
-         .init_val   = 0x0000,
-         .ro_mask    = 0xFF8E,
--        .emu_mask   = 0x007F,
-+        .emu_mask   = 0x017F,
-         .init       = xen_pt_msgctrl_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_msgctrl_reg_write,
-@@ -1316,6 +1350,50 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_msgdata_reg_write,
-     },
-+    /* Mask reg (if PCI_MSI_FLAGS_MASKBIT set, for 32-bit devices) */
-+    {
-+        .offset     = PCI_MSI_MASK_32,
-+        .size       = 4,
-+        .init_val   = 0x00000000,
-+        .ro_mask    = 0xFFFFFFFF,
-+        .emu_mask   = 0xFFFFFFFF,
-+        .init       = xen_pt_mask_reg_init,
-+        .u.dw.read  = xen_pt_long_reg_read,
-+        .u.dw.write = xen_pt_long_reg_write,
-+    },
-+    /* Mask reg (if PCI_MSI_FLAGS_MASKBIT set, for 64-bit devices) */
-+    {
-+        .offset     = PCI_MSI_MASK_64,
-+        .size       = 4,
-+        .init_val   = 0x00000000,
-+        .ro_mask    = 0xFFFFFFFF,
-+        .emu_mask   = 0xFFFFFFFF,
-+        .init       = xen_pt_mask_reg_init,
-+        .u.dw.read  = xen_pt_long_reg_read,
-+        .u.dw.write = xen_pt_long_reg_write,
-+    },
-+    /* Pending reg (if PCI_MSI_FLAGS_MASKBIT set, for 32-bit devices) */
-+    {
-+        .offset     = PCI_MSI_MASK_32 + 4,
-+        .size       = 4,
-+        .init_val   = 0x00000000,
-+        .ro_mask    = 0xFFFFFFFF,
-+        .emu_mask   = 0x00000000,
-+        .init       = xen_pt_pending_reg_init,
-+        .u.dw.read  = xen_pt_long_reg_read,
-+        .u.dw.write = xen_pt_long_reg_write,
-+    },
-+    /* Pending reg (if PCI_MSI_FLAGS_MASKBIT set, for 64-bit devices) */
-+    {
-+        .offset     = PCI_MSI_MASK_64 + 4,
-+        .size       = 4,
-+        .init_val   = 0x00000000,
-+        .ro_mask    = 0xFFFFFFFF,
-+        .emu_mask   = 0x00000000,
-+        .init       = xen_pt_pending_reg_init,
-+        .u.dw.read  = xen_pt_long_reg_read,
-+        .u.dw.write = xen_pt_long_reg_write,
-+    },
-     {
-         .size = 0,
-     },
-diff --git a/include/hw/pci/pci_regs.h b/include/hw/pci/pci_regs.h
-index 56a404b..57e8c80 100644
---- a/include/hw/pci/pci_regs.h
-+++ b/include/hw/pci/pci_regs.h
-@@ -298,8 +298,10 @@
- #define PCI_MSI_ADDRESS_HI	8	/* Upper 32 bits (if PCI_MSI_FLAGS_64BIT set) */
- #define PCI_MSI_DATA_32		8	/* 16 bits of data for 32-bit devices */
- #define PCI_MSI_MASK_32		12	/* Mask bits register for 32-bit devices */
-+#define PCI_MSI_PENDING_32	16	/* Pending bits register for 32-bit devices */
- #define PCI_MSI_DATA_64		12	/* 16 bits of data for 64-bit devices */
- #define PCI_MSI_MASK_64		16	/* Mask bits register for 64-bit devices */
-+#define PCI_MSI_PENDING_64	20	/* Pending bits register for 32-bit devices */
- 
- /* MSI-X registers */
- #define PCI_MSIX_FLAGS		2
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4105.patch b/gnu/packages/patches/qemu-CVE-2015-4105.patch
deleted file mode 100644
index f1b349f1e5..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4105.patch
+++ /dev/null
@@ -1,85 +0,0 @@
-From b38ec5ee7a581776bbce0bdaecb397632c3c4791 Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:00 +0000
-Subject: [PATCH] xen/MSI-X: limit error messages
-
-Limit error messages resulting from bad guest behavior to avoid allowing
-the guest to cause the control domain's disk to fill.
-
-The first message in pci_msix_write() can simply be deleted, as this
-is indeed bad guest behavior, but such out of bounds writes don't
-really need to be logged.
-
-The second one is more problematic, as there guest behavior may only
-appear to be wrong: For one, the old logic didn't take the mask-all bit
-into account. And then this shouldn't depend on host device state (i.e.
-the host may have masked the entry without the guest having done so).
-Plus these writes shouldn't be dropped even when an entry is unmasked.
-Instead, if they can't be made take effect right away, they should take
-effect on the next unmasking or enabling operation - the specification
-explicitly describes such caching behavior. Until we can validly drop
-the message (implementing such caching/latching behavior), issue the
-message just once per MSI-X table entry.
-
-Note that the log message in pci_msix_read() similar to the one being
-removed here is not an issue: "addr" being of unsigned type, and the
-maximum size of the MSI-X table being 32k, entry_nr simply can't be
-negative and hence the conditonal guarding issuing of the message will
-never be true.
-
-This is XSA-130.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
----
- hw/xen/xen_pt.h     |  1 +
- hw/xen/xen_pt_msi.c | 12 +++++++-----
- 2 files changed, 8 insertions(+), 5 deletions(-)
-
-diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h
-index 52ceb85..8c9b6c2 100644
---- a/hw/xen/xen_pt.h
-+++ b/hw/xen/xen_pt.h
-@@ -175,6 +175,7 @@ typedef struct XenPTMSIXEntry {
-     uint32_t data;
-     uint32_t vector_ctrl;
-     bool updated; /* indicate whether MSI ADDR or DATA is updated */
-+    bool warned;  /* avoid issuing (bogus) warning more than once */
- } XenPTMSIXEntry;
- typedef struct XenPTMSIX {
-     uint32_t ctrl_offset;
-diff --git a/hw/xen/xen_pt_msi.c b/hw/xen/xen_pt_msi.c
-index 9ed9321..68db623 100644
---- a/hw/xen/xen_pt_msi.c
-+++ b/hw/xen/xen_pt_msi.c
-@@ -434,11 +434,10 @@ static void pci_msix_write(void *opaque, hwaddr addr,
-     XenPCIPassthroughState *s = opaque;
-     XenPTMSIX *msix = s->msix;
-     XenPTMSIXEntry *entry;
--    int entry_nr, offset;
-+    unsigned int entry_nr, offset;
- 
-     entry_nr = addr / PCI_MSIX_ENTRY_SIZE;
--    if (entry_nr < 0 || entry_nr >= msix->total_entries) {
--        XEN_PT_ERR(&s->dev, "asked MSI-X entry '%i' invalid!\n", entry_nr);
-+    if (entry_nr >= msix->total_entries) {
-         return;
-     }
-     entry = &msix->msix_entry[entry_nr];
-@@ -460,8 +459,11 @@ static void pci_msix_write(void *opaque, hwaddr addr,
-             + PCI_MSIX_ENTRY_VECTOR_CTRL;
- 
-         if (msix->enabled && !(*vec_ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT)) {
--            XEN_PT_ERR(&s->dev, "Can't update msix entry %d since MSI-X is"
--                       " already enabled.\n", entry_nr);
-+            if (!entry->warned) {
-+                entry->warned = true;
-+                XEN_PT_ERR(&s->dev, "Can't update msix entry %d since MSI-X is"
-+                           " already enabled.\n", entry_nr);
-+            }
-             return;
-         }
- 
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt1.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt1.patch
deleted file mode 100644
index 1a2db950da..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt1.patch
+++ /dev/null
@@ -1,72 +0,0 @@
-From d1d35cf4ffb6a60a356193397919e83306d0bb74 Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/MSI: don't open-code pass-through of enable bit
- modifications
-
-Without this the actual XSA-131 fix would cause the enable bit to not
-get set anymore (due to the write back getting suppressed there based
-on the OR of emu_mask, ro_mask, and res_mask).
-
-Note that the fiddling with the enable bit shouldn't really be done by
-qemu, but making this work right (via libxc and the hypervisor) will
-require more extensive changes, which can be postponed until after the
-security issue got addressed.
-
-This is a preparatory patch for XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
----
- hw/xen/xen_pt_config_init.c | 10 ++--------
- 1 file changed, 2 insertions(+), 8 deletions(-)
-
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 68b8f22..436d0fd 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -1053,7 +1053,6 @@ static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
-     XenPTMSI *msi = s->msi;
-     uint16_t writable_mask = 0;
-     uint16_t throughable_mask = 0;
--    uint16_t raw_val;
- 
-     /* Currently no support for multi-vector */
-     if (*val & PCI_MSI_FLAGS_QSIZE) {
-@@ -1066,12 +1065,11 @@ static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
-     msi->flags |= cfg_entry->data & ~PCI_MSI_FLAGS_ENABLE;
- 
-     /* create value for writing to I/O device register */
--    raw_val = *val;
-     throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     /* update MSI */
--    if (raw_val & PCI_MSI_FLAGS_ENABLE) {
-+    if (*val & PCI_MSI_FLAGS_ENABLE) {
-         /* setup MSI pirq for the first time */
-         if (!msi->initialized) {
-             /* Init physical one */
-@@ -1099,10 +1097,6 @@ static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
-         xen_pt_msi_disable(s);
-     }
- 
--    /* pass through MSI_ENABLE bit */
--    *val &= ~PCI_MSI_FLAGS_ENABLE;
--    *val |= raw_val & PCI_MSI_FLAGS_ENABLE;
--
-     return 0;
- }
- 
-@@ -1301,7 +1295,7 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .size       = 2,
-         .init_val   = 0x0000,
-         .ro_mask    = 0xFF8E,
--        .emu_mask   = 0x017F,
-+        .emu_mask   = 0x017E,
-         .init       = xen_pt_msgctrl_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_msgctrl_reg_write,
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch
deleted file mode 100644
index 2eeb7ef0af..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch
+++ /dev/null
@@ -1,81 +0,0 @@
-From d61bb2482dc0c7426f451f23ba7e2748ae2cc06d Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/pt: consolidate PM capability emu_mask
-
-There's no point in xen_pt_pmcsr_reg_{read,write}() each ORing
-PCI_PM_CTRL_STATE_MASK and PCI_PM_CTRL_NO_SOFT_RESET into a local
-emu_mask variable - we can have the same effect by setting the field
-descriptor's emu_mask member suitably right away. Note that
-xen_pt_pmcsr_reg_write() is being retained in order to allow later
-patches to be less intrusive.
-
-This is a preparatory patch for XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
-Acked-by: Ian Campbell <ian.campbell@citrix.com>
----
- hw/xen/xen_pt_config_init.c | 25 ++++---------------------
- 1 file changed, 4 insertions(+), 21 deletions(-)
-
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 436d0fd..516236a 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -933,38 +933,21 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
-  * Power Management Capability
-  */
- 
--/* read Power Management Control/Status register */
--static int xen_pt_pmcsr_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
--                                 uint16_t *value, uint16_t valid_mask)
--{
--    XenPTRegInfo *reg = cfg_entry->reg;
--    uint16_t valid_emu_mask = reg->emu_mask;
--
--    valid_emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET;
--
--    valid_emu_mask = valid_emu_mask & valid_mask;
--    *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask);
--
--    return 0;
--}
- /* write Power Management Control/Status register */
- static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s,
-                                   XenPTReg *cfg_entry, uint16_t *val,
-                                   uint16_t dev_value, uint16_t valid_mask)
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
--    uint16_t emu_mask = reg->emu_mask;
-     uint16_t writable_mask = 0;
-     uint16_t throughable_mask = 0;
- 
--    emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET;
--
-     /* modify emulate register */
--    writable_mask = emu_mask & ~reg->ro_mask & valid_mask;
-+    writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~emu_mask & valid_mask;
-+    throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     return 0;
-@@ -1000,9 +983,9 @@ static XenPTRegInfo xen_pt_emu_reg_pm[] = {
-         .size       = 2,
-         .init_val   = 0x0008,
-         .ro_mask    = 0xE1FC,
--        .emu_mask   = 0x8100,
-+        .emu_mask   = 0x810B,
-         .init       = xen_pt_common_reg_init,
--        .u.w.read   = xen_pt_pmcsr_reg_read,
-+        .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_pmcsr_reg_write,
-     },
-     {
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt3.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt3.patch
deleted file mode 100644
index 8d12d7ac5b..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt3.patch
+++ /dev/null
@@ -1,33 +0,0 @@
-From c4ff1e68c621928abc680266cad0a451686c403b Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/pt: correctly handle PM status bit
-
-xen_pt_pmcsr_reg_write() needs an adjustment to deal with the RW1C
-nature of the not passed through bit 15 (PCI_PM_CTRL_PME_STATUS).
-
-This is a preparatory patch for XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
----
- hw/xen/xen_pt_config_init.c | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
-
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 516236a..027ac32 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -948,7 +948,8 @@ static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s,
- 
-     /* create value for writing to I/O device register */
-     throughable_mask = ~reg->emu_mask & valid_mask;
--    *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
-+    *val = XEN_PT_MERGE_VALUE(*val, dev_value & ~PCI_PM_CTRL_PME_STATUS,
-+                              throughable_mask);
- 
-     return 0;
- }
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt4.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt4.patch
deleted file mode 100644
index 068f560e35..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt4.patch
+++ /dev/null
@@ -1,260 +0,0 @@
-From 0e7ef22136955169a0fd03c4e41af95662352733 Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/pt: split out calculation of throughable mask in PCI
- config space handling
-
-This is just to avoid having to adjust that calculation later in
-multiple places.
-
-Note that including ->ro_mask in get_throughable_mask()'s calculation
-is only an apparent (i.e. benign) behavioral change: For r/o fields it
-doesn't matter > whether they get passed through - either the same flag
-is also set in emu_mask (then there's no change at all) or the field is
-r/o in hardware (and hence a write won't change it anyway).
-
-This is a preparatory patch for XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
-Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
----
- hw/xen/xen_pt_config_init.c | 51 ++++++++++++++++++---------------------------
- 1 file changed, 20 insertions(+), 31 deletions(-)
-
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 027ac32..3833b9e 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -95,6 +95,14 @@ XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address)
-     return NULL;
- }
- 
-+static uint32_t get_throughable_mask(const XenPCIPassthroughState *s,
-+                                     const XenPTRegInfo *reg,
-+                                     uint32_t valid_mask)
-+{
-+    uint32_t throughable_mask = ~(reg->emu_mask | reg->ro_mask);
-+
-+    return throughable_mask & valid_mask;
-+}
- 
- /****************
-  * general register functions
-@@ -157,14 +165,13 @@ static int xen_pt_byte_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint8_t writable_mask = 0;
--    uint8_t throughable_mask = 0;
-+    uint8_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
- 
-     /* modify emulate register */
-     writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     return 0;
-@@ -175,14 +182,13 @@ static int xen_pt_word_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint16_t writable_mask = 0;
--    uint16_t throughable_mask = 0;
-+    uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
- 
-     /* modify emulate register */
-     writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     return 0;
-@@ -193,14 +199,13 @@ static int xen_pt_long_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint32_t writable_mask = 0;
--    uint32_t throughable_mask = 0;
-+    uint32_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
- 
-     /* modify emulate register */
-     writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     return 0;
-@@ -292,15 +297,13 @@ static int xen_pt_cmd_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint16_t writable_mask = 0;
--    uint16_t throughable_mask = 0;
-+    uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
- 
-     /* modify emulate register */
-     writable_mask = ~reg->ro_mask & valid_mask;
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
--
-     if (*val & PCI_COMMAND_INTX_DISABLE) {
-         throughable_mask |= PCI_COMMAND_INTX_DISABLE;
-     } else {
-@@ -454,7 +457,6 @@ static int xen_pt_bar_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
-     PCIDevice *d = &s->dev;
-     const PCIIORegion *r;
-     uint32_t writable_mask = 0;
--    uint32_t throughable_mask = 0;
-     uint32_t bar_emu_mask = 0;
-     uint32_t bar_ro_mask = 0;
-     uint32_t r_size = 0;
-@@ -511,8 +513,7 @@ static int xen_pt_bar_reg_write(XenPCIPassthroughState *s, XenPTReg *cfg_entry,
-     }
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~bar_emu_mask & valid_mask;
--    *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
-+    *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
- 
-     return 0;
- }
-@@ -526,9 +527,8 @@ static int xen_pt_exp_rom_bar_reg_write(XenPCIPassthroughState *s,
-     XenPTRegion *base = NULL;
-     PCIDevice *d = (PCIDevice *)&s->dev;
-     uint32_t writable_mask = 0;
--    uint32_t throughable_mask = 0;
-+    uint32_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
-     pcibus_t r_size = 0;
--    uint32_t bar_emu_mask = 0;
-     uint32_t bar_ro_mask = 0;
- 
-     r_size = d->io_regions[PCI_ROM_SLOT].size;
-@@ -537,7 +537,6 @@ static int xen_pt_exp_rom_bar_reg_write(XenPCIPassthroughState *s,
-     r_size = xen_pt_get_emul_size(base->bar_flag, r_size);
- 
-     /* set emulate mask and read-only mask */
--    bar_emu_mask = reg->emu_mask;
-     bar_ro_mask = (reg->ro_mask | (r_size - 1)) & ~PCI_ROM_ADDRESS_ENABLE;
- 
-     /* modify emulate register */
-@@ -545,7 +544,6 @@ static int xen_pt_exp_rom_bar_reg_write(XenPCIPassthroughState *s,
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~bar_emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     return 0;
-@@ -940,14 +938,13 @@ static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint16_t writable_mask = 0;
--    uint16_t throughable_mask = 0;
-+    uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
- 
-     /* modify emulate register */
-     writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask;
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value & ~PCI_PM_CTRL_PME_STATUS,
-                               throughable_mask);
- 
-@@ -1036,7 +1033,7 @@ static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
-     XenPTRegInfo *reg = cfg_entry->reg;
-     XenPTMSI *msi = s->msi;
-     uint16_t writable_mask = 0;
--    uint16_t throughable_mask = 0;
-+    uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
- 
-     /* Currently no support for multi-vector */
-     if (*val & PCI_MSI_FLAGS_QSIZE) {
-@@ -1049,7 +1046,6 @@ static int xen_pt_msgctrl_reg_write(XenPCIPassthroughState *s,
-     msi->flags |= cfg_entry->data & ~PCI_MSI_FLAGS_ENABLE;
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     /* update MSI */
-@@ -1161,7 +1157,6 @@ static int xen_pt_msgaddr32_reg_write(XenPCIPassthroughState *s,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint32_t writable_mask = 0;
--    uint32_t throughable_mask = 0;
-     uint32_t old_addr = cfg_entry->data;
- 
-     /* modify emulate register */
-@@ -1170,8 +1165,7 @@ static int xen_pt_msgaddr32_reg_write(XenPCIPassthroughState *s,
-     s->msi->addr_lo = cfg_entry->data;
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
--    *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
-+    *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
- 
-     /* update MSI */
-     if (cfg_entry->data != old_addr) {
-@@ -1189,7 +1183,6 @@ static int xen_pt_msgaddr64_reg_write(XenPCIPassthroughState *s,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint32_t writable_mask = 0;
--    uint32_t throughable_mask = 0;
-     uint32_t old_addr = cfg_entry->data;
- 
-     /* check whether the type is 64 bit or not */
-@@ -1206,8 +1199,7 @@ static int xen_pt_msgaddr64_reg_write(XenPCIPassthroughState *s,
-     s->msi->addr_hi = cfg_entry->data;
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
--    *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
-+    *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
- 
-     /* update MSI */
-     if (cfg_entry->data != old_addr) {
-@@ -1229,7 +1221,6 @@ static int xen_pt_msgdata_reg_write(XenPCIPassthroughState *s,
-     XenPTRegInfo *reg = cfg_entry->reg;
-     XenPTMSI *msi = s->msi;
-     uint16_t writable_mask = 0;
--    uint16_t throughable_mask = 0;
-     uint16_t old_data = cfg_entry->data;
-     uint32_t offset = reg->offset;
- 
-@@ -1247,8 +1238,7 @@ static int xen_pt_msgdata_reg_write(XenPCIPassthroughState *s,
-     msi->data = cfg_entry->data;
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
--    *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
-+    *val = XEN_PT_MERGE_VALUE(*val, dev_value, 0);
- 
-     /* update MSI */
-     if (cfg_entry->data != old_data) {
-@@ -1410,7 +1400,7 @@ static int xen_pt_msixctrl_reg_write(XenPCIPassthroughState *s,
- {
-     XenPTRegInfo *reg = cfg_entry->reg;
-     uint16_t writable_mask = 0;
--    uint16_t throughable_mask = 0;
-+    uint16_t throughable_mask = get_throughable_mask(s, reg, valid_mask);
-     int debug_msix_enabled_old;
- 
-     /* modify emulate register */
-@@ -1418,7 +1408,6 @@ static int xen_pt_msixctrl_reg_write(XenPCIPassthroughState *s,
-     cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask);
- 
-     /* create value for writing to I/O device register */
--    throughable_mask = ~reg->emu_mask & valid_mask;
-     *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask);
- 
-     /* update MSI-X */
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt5.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt5.patch
deleted file mode 100644
index e28a491689..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt5.patch
+++ /dev/null
@@ -1,33 +0,0 @@
-From 45ebe3916ab16f859ed930e92fbd52d84d5dcdaf Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/pt: mark all PCIe capability bits read-only
-
-xen_pt_emu_reg_pcie[]'s PCI_EXP_DEVCAP needs to cover all bits as read-
-only to avoid unintended write-back (just a precaution, the field ought
-to be read-only in hardware).
-
-This is a preparatory patch for XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
----
- hw/xen/xen_pt_config_init.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 3833b9e..9f6c00e 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -871,7 +871,7 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
-         .offset     = PCI_EXP_DEVCAP,
-         .size       = 4,
-         .init_val   = 0x00000000,
--        .ro_mask    = 0x1FFCFFFF,
-+        .ro_mask    = 0xFFFFFFFF,
-         .emu_mask   = 0x10000000,
-         .init       = xen_pt_common_reg_init,
-         .u.dw.read  = xen_pt_long_reg_read,
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt6.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt6.patch
deleted file mode 100644
index 8fff71e1c3..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt6.patch
+++ /dev/null
@@ -1,89 +0,0 @@
-From 0ad3393ad032f76e88b4dbd04d36ad84dff75dd6 Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/pt: mark reserved bits in PCI config space fields
-
-The adjustments are solely to make the subsequent patches work right
-(and hence make the patch set consistent), namely if permissive mode
-(introduced by the last patch) gets used (as both reserved registers
-and reserved fields must be similarly protected from guest access in
-default mode, but the guest should be allowed access to them in
-permissive mode).
-
-This is a preparatory patch for XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
----
- hw/xen/xen_pt.h             |  2 ++
- hw/xen/xen_pt_config_init.c | 14 +++++++++-----
- 2 files changed, 11 insertions(+), 5 deletions(-)
-
-diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h
-index 8c9b6c2..f9795eb 100644
---- a/hw/xen/xen_pt.h
-+++ b/hw/xen/xen_pt.h
-@@ -101,6 +101,8 @@ struct XenPTRegInfo {
-     uint32_t offset;
-     uint32_t size;
-     uint32_t init_val;
-+    /* reg reserved field mask (ON:reserved, OFF:defined) */
-+    uint32_t res_mask;
-     /* reg read only field mask (ON:RO/ROS, OFF:other) */
-     uint32_t ro_mask;
-     /* reg emulate field mask (ON:emu, OFF:passthrough) */
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 9f6c00e..efd8bac 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -578,7 +578,7 @@ static XenPTRegInfo xen_pt_emu_reg_header0[] = {
-         .offset     = PCI_COMMAND,
-         .size       = 2,
-         .init_val   = 0x0000,
--        .ro_mask    = 0xF880,
-+        .res_mask   = 0xF880,
-         .emu_mask   = 0x0743,
-         .init       = xen_pt_common_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-@@ -603,7 +603,8 @@ static XenPTRegInfo xen_pt_emu_reg_header0[] = {
-         .offset     = PCI_STATUS,
-         .size       = 2,
-         .init_val   = 0x0000,
--        .ro_mask    = 0x06FF,
-+        .res_mask   = 0x0007,
-+        .ro_mask    = 0x06F8,
-         .emu_mask   = 0x0010,
-         .init       = xen_pt_status_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-@@ -980,7 +981,8 @@ static XenPTRegInfo xen_pt_emu_reg_pm[] = {
-         .offset     = PCI_PM_CTRL,
-         .size       = 2,
-         .init_val   = 0x0008,
--        .ro_mask    = 0xE1FC,
-+        .res_mask   = 0x00F0,
-+        .ro_mask    = 0xE10C,
-         .emu_mask   = 0x810B,
-         .init       = xen_pt_common_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-@@ -1268,7 +1270,8 @@ static XenPTRegInfo xen_pt_emu_reg_msi[] = {
-         .offset     = PCI_MSI_FLAGS,
-         .size       = 2,
-         .init_val   = 0x0000,
--        .ro_mask    = 0xFF8E,
-+        .res_mask   = 0xFE00,
-+        .ro_mask    = 0x018E,
-         .emu_mask   = 0x017E,
-         .init       = xen_pt_msgctrl_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
-@@ -1446,7 +1449,8 @@ static XenPTRegInfo xen_pt_emu_reg_msix[] = {
-         .offset     = PCI_MSI_FLAGS,
-         .size       = 2,
-         .init_val   = 0x0000,
--        .ro_mask    = 0x3FFF,
-+        .res_mask   = 0x3800,
-+        .ro_mask    = 0x07FF,
-         .emu_mask   = 0x0000,
-         .init       = xen_pt_msixctrl_reg_init,
-         .u.w.read   = xen_pt_word_reg_read,
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt7.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt7.patch
deleted file mode 100644
index a51a438f0d..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt7.patch
+++ /dev/null
@@ -1,72 +0,0 @@
-From a88a3f887181605f4487a22bdfb7d87ffafde5d9 Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/pt: add a few PCI config space field descriptions
-
-Since the next patch will turn all not explicitly described fields
-read-only by default, those fields that have guest writable bits need
-to be given explicit descriptors.
-
-This is a preparatory patch for XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
----
- hw/xen/xen_pt_config_init.c | 28 ++++++++++++++++++++++++++++
- 1 file changed, 28 insertions(+)
-
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index efd8bac..19f926b 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -754,6 +754,15 @@ static XenPTRegInfo xen_pt_emu_reg_vpd[] = {
-         .u.b.write  = xen_pt_byte_reg_write,
-     },
-     {
-+        .offset     = PCI_VPD_ADDR,
-+        .size       = 2,
-+        .ro_mask    = 0x0003,
-+        .emu_mask   = 0x0003,
-+        .init       = xen_pt_common_reg_init,
-+        .u.w.read   = xen_pt_word_reg_read,
-+        .u.w.write  = xen_pt_word_reg_write,
-+    },
-+    {
-         .size = 0,
-     },
- };
-@@ -889,6 +898,16 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
-         .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_word_reg_write,
-     },
-+    /* Device Status reg */
-+    {
-+        .offset     = PCI_EXP_DEVSTA,
-+        .size       = 2,
-+        .res_mask   = 0xFFC0,
-+        .ro_mask    = 0x0030,
-+        .init       = xen_pt_common_reg_init,
-+        .u.w.read   = xen_pt_word_reg_read,
-+        .u.w.write  = xen_pt_word_reg_write,
-+    },
-     /* Link Control reg */
-     {
-         .offset     = PCI_EXP_LNKCTL,
-@@ -900,6 +919,15 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = {
-         .u.w.read   = xen_pt_word_reg_read,
-         .u.w.write  = xen_pt_word_reg_write,
-     },
-+    /* Link Status reg */
-+    {
-+        .offset     = PCI_EXP_LNKSTA,
-+        .size       = 2,
-+        .ro_mask    = 0x3FFF,
-+        .init       = xen_pt_common_reg_init,
-+        .u.w.read   = xen_pt_word_reg_read,
-+        .u.w.write  = xen_pt_word_reg_write,
-+    },
-     /* Device Control 2 reg */
-     {
-         .offset     = 0x28,
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt8.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt8.patch
deleted file mode 100644
index bc3e03217f..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-4106-pt8.patch
+++ /dev/null
@@ -1,132 +0,0 @@
-From c25bbf1545a53ac051f9e51d4140e397660c10ae Mon Sep 17 00:00:00 2001
-From: Jan Beulich <jbeulich@suse.com>
-Date: Tue, 2 Jun 2015 15:07:01 +0000
-Subject: [PATCH] xen/pt: unknown PCI config space fields should be read-only
-
-... by default. Add a per-device "permissive" mode similar to pciback's
-to allow restoring previous behavior (and hence break security again,
-i.e. should be used only for trusted guests).
-
-This is part of XSA-131.
-
-Signed-off-by: Jan Beulich <jbeulich@suse.com>
-Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
-Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>)
----
- hw/xen/xen_pt.c             | 32 +++++++++++++++++++++++++++++---
- hw/xen/xen_pt.h             |  2 ++
- hw/xen/xen_pt_config_init.c |  4 ++++
- 3 files changed, 35 insertions(+), 3 deletions(-)
-
-diff --git a/hw/xen/xen_pt.c b/hw/xen/xen_pt.c
-index 8923582..9afcda8 100644
---- a/hw/xen/xen_pt.c
-+++ b/hw/xen/xen_pt.c
-@@ -239,6 +239,7 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
-     XenPTReg *reg_entry = NULL;
-     uint32_t find_addr = addr;
-     XenPTRegInfo *reg = NULL;
-+    bool wp_flag = false;
- 
-     if (xen_pt_pci_config_access_check(d, addr, len)) {
-         return;
-@@ -278,6 +279,10 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
- 
-     /* pass directly to the real device for passthrough type register group */
-     if (reg_grp_entry == NULL) {
-+        if (!s->permissive) {
-+            wb_mask = 0;
-+            wp_flag = true;
-+        }
-         goto out;
-     }
- 
-@@ -298,12 +303,15 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
-             uint32_t real_offset = reg_grp_entry->base_offset + reg->offset;
-             uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3);
-             uint8_t *ptr_val = NULL;
-+            uint32_t wp_mask = reg->emu_mask | reg->ro_mask;
- 
-             valid_mask <<= (find_addr - real_offset) << 3;
-             ptr_val = (uint8_t *)&val + (real_offset & 3);
--            if (reg->emu_mask == (0xFFFFFFFF >> ((4 - reg->size) << 3))) {
--                wb_mask &= ~((reg->emu_mask
--                              >> ((find_addr - real_offset) << 3))
-+            if (!s->permissive) {
-+                wp_mask |= reg->res_mask;
-+            }
-+            if (wp_mask == (0xFFFFFFFF >> ((4 - reg->size) << 3))) {
-+                wb_mask &= ~((wp_mask >> ((find_addr - real_offset) << 3))
-                              << ((len - emul_len) << 3));
-             }
- 
-@@ -347,6 +355,16 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
-         } else {
-             /* nothing to do with passthrough type register,
-              * continue to find next byte */
-+            if (!s->permissive) {
-+                wb_mask &= ~(0xff << ((len - emul_len) << 3));
-+                /* Unused BARs will make it here, but we don't want to issue
-+                 * warnings for writes to them (bogus writes get dealt with
-+                 * above).
-+                 */
-+                if (index < 0) {
-+                    wp_flag = true;
-+                }
-+            }
-             emul_len--;
-             find_addr++;
-         }
-@@ -358,6 +376,13 @@ static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
-     memory_region_transaction_commit();
- 
- out:
-+    if (wp_flag && !s->permissive_warned) {
-+        s->permissive_warned = true;
-+        xen_pt_log(d, "Write-back to unknown field 0x%02x (partially) inhibited (0x%0*x)\n",
-+                   addr, len * 2, wb_mask);
-+        xen_pt_log(d, "If the device doesn't work, try enabling permissive mode\n");
-+        xen_pt_log(d, "(unsafe) and if it helps report the problem to xen-devel\n");
-+    }
-     for (index = 0; wb_mask; index += len) {
-         /* unknown regs are passed through */
-         while (!(wb_mask & 0xff)) {
-@@ -824,6 +849,7 @@ static void xen_pt_unregister_device(PCIDevice *d)
- 
- static Property xen_pci_passthrough_properties[] = {
-     DEFINE_PROP_PCI_HOST_DEVADDR("hostaddr", XenPCIPassthroughState, hostaddr),
-+    DEFINE_PROP_BOOL("permissive", XenPCIPassthroughState, permissive, false),
-     DEFINE_PROP_END_OF_LIST(),
- };
- 
-diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h
-index f9795eb..4bba559 100644
---- a/hw/xen/xen_pt.h
-+++ b/hw/xen/xen_pt.h
-@@ -197,6 +197,8 @@ struct XenPCIPassthroughState {
- 
-     PCIHostDeviceAddress hostaddr;
-     bool is_virtfn;
-+    bool permissive;
-+    bool permissive_warned;
-     XenHostPCIDevice real_device;
-     XenPTRegion bases[PCI_NUM_REGIONS]; /* Access regions */
-     QLIST_HEAD(, XenPTRegGroup) reg_grps;
-diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c
-index 19f926b..f3cf069 100644
---- a/hw/xen/xen_pt_config_init.c
-+++ b/hw/xen/xen_pt_config_init.c
-@@ -101,6 +101,10 @@ static uint32_t get_throughable_mask(const XenPCIPassthroughState *s,
- {
-     uint32_t throughable_mask = ~(reg->emu_mask | reg->ro_mask);
- 
-+    if (!s->permissive) {
-+        throughable_mask &= ~reg->res_mask;
-+    }
-+
-     return throughable_mask & valid_mask;
- }
- 
--- 
-2.2.1
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-5745.patch b/gnu/packages/patches/qemu-CVE-2015-5745.patch
deleted file mode 100644
index 2326279026..0000000000
--- a/gnu/packages/patches/qemu-CVE-2015-5745.patch
+++ /dev/null
@@ -1,32 +0,0 @@
-From 7882080388be5088e72c425b02223c02e6cb4295 Mon Sep 17 00:00:00 2001
-From: "Michael S. Tsirkin" <mst@redhat.com>
-Date: Thu, 23 Jul 2015 17:52:02 +0300
-Subject: [PATCH] virtio-serial: fix ANY_LAYOUT
-
-Don't assume a specific layout for control messages.
-Required by virtio 1.
-
-Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-Reviewed-by: Amit Shah <amit.shah@redhat.com>
-Reviewed-by: Jason Wang <jasowang@redhat.com>
----
- hw/char/virtio-serial-bus.c | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
-
-diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
-index 78c73e5..929e49c 100644
---- a/hw/char/virtio-serial-bus.c
-+++ b/hw/char/virtio-serial-bus.c
-@@ -195,7 +195,8 @@ static size_t send_control_msg(VirtIOSerial *vser, void *buf, size_t len)
-         return 0;
-     }
- 
--    memcpy(elem.in_sg[0].iov_base, buf, len);
-+    /* TODO: detect a buffer that's too short, set NEEDS_RESET */
-+    iov_from_buf(elem.in_sg, elem.in_num, 0, buf, len);
- 
-     virtqueue_push(vq, &elem, len);
-     virtio_notify(VIRTIO_DEVICE(vser), vq);
--- 
-2.4.3
-
diff --git a/gnu/packages/patches/qemu-CVE-2015-6855.patch b/gnu/packages/patches/qemu-CVE-2015-6855.patch
new file mode 100644
index 0000000000..e058dadd69
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2015-6855.patch
@@ -0,0 +1,144 @@
+From d9033e1d3aa666c5071580617a57bd853c5d794a Mon Sep 17 00:00:00 2001
+From: John Snow <jsnow@redhat.com>
+Date: Thu, 17 Sep 2015 14:17:05 -0400
+Subject: [PATCH] ide: fix ATAPI command permissions
+
+We're a little too lenient with what we'll let an ATAPI drive handle.
+Clamp down on the IDE command execution table to remove CD_OK permissions
+from commands that are not and have never been ATAPI commands.
+
+For ATAPI command validity, please see:
+- ATA4 Section 6.5 ("PACKET Command feature set")
+- ATA8/ACS Section 4.3 ("The PACKET feature set")
+- ACS3 Section 4.3 ("The PACKET feature set")
+
+ACS3 has a historical command validity table in Table B.4
+("Historical Command Assignments") that can be referenced to find when
+a command was introduced, deprecated, obsoleted, etc.
+
+The only reference for ATAPI command validity is by checking that
+version's PACKET feature set section.
+
+ATAPI was introduced by T13 into ATA4, all commands retired prior to ATA4
+therefore are assumed to have never been ATAPI commands.
+
+Mandatory commands, as listed in ATA8-ACS3, are:
+
+- DEVICE RESET
+- EXECUTE DEVICE DIAGNOSTIC
+- IDENTIFY DEVICE
+- IDENTIFY PACKET DEVICE
+- NOP
+- PACKET
+- READ SECTOR(S)
+- SET FEATURES
+
+Optional commands as listed in ATA8-ACS3, are:
+
+- FLUSH CACHE
+- READ LOG DMA EXT
+- READ LOG EXT
+- WRITE LOG DMA EXT
+- WRITE LOG EXT
+
+All other commands are illegal to send to an ATAPI device and should
+be rejected by the device.
+
+CD_OK removal justifications:
+
+0x06 WIN_DSM              Defined in ACS2. Not valid for ATAPI.
+0x21 WIN_READ_ONCE        Retired in ATA5. Not ATAPI in ATA4.
+0x94 WIN_STANDBYNOW2      Retired in ATA4. Did not coexist with ATAPI.
+0x95 WIN_IDLEIMMEDIATE2   Retired in ATA4. Did not coexist with ATAPI.
+0x96 WIN_STANDBY2         Retired in ATA4. Did not coexist with ATAPI.
+0x97 WIN_SETIDLE2         Retired in ATA4. Did not coexist with ATAPI.
+0x98 WIN_CHECKPOWERMODE2  Retired in ATA4. Did not coexist with ATAPI.
+0x99 WIN_SLEEPNOW2        Retired in ATA4. Did not coexist with ATAPI.
+0xE0 WIN_STANDBYNOW1      Not part of ATAPI in ATA4, ACS or ACS3.
+0xE1 WIN_IDLEIMMDIATE     Not part of ATAPI in ATA4, ACS or ACS3.
+0xE2 WIN_STANDBY          Not part of ATAPI in ATA4, ACS or ACS3.
+0xE3 WIN_SETIDLE1         Not part of ATAPI in ATA4, ACS or ACS3.
+0xE4 WIN_CHECKPOWERMODE1  Not part of ATAPI in ATA4, ACS or ACS3.
+0xE5 WIN_SLEEPNOW1        Not part of ATAPI in ATA4, ACS or ACS3.
+0xF8 WIN_READ_NATIVE_MAX  Obsoleted in ACS3. Not ATAPI in ATA4 or ACS.
+
+This patch fixes a divide by zero fault that can be caused by sending
+the WIN_READ_NATIVE_MAX command to an ATAPI drive, which causes it to
+attempt to use zeroed CHS values to perform sector arithmetic.
+
+Reported-by: Qinghao Tang <luodalongde@gmail.com>
+Signed-off-by: John Snow <jsnow@redhat.com>
+Reviewed-by: Markus Armbruster <armbru@redhat.com>
+Message-id: 1441816082-21031-1-git-send-email-jsnow@redhat.com
+CC: qemu-stable@nongnu.org
+---
+ hw/ide/core.c | 30 +++++++++++++++---------------
+ 1 file changed, 15 insertions(+), 15 deletions(-)
+
+diff --git a/hw/ide/core.c b/hw/ide/core.c
+index 8ba04df..1cc6945 100644
+--- a/hw/ide/core.c
++++ b/hw/ide/core.c
+@@ -1746,11 +1746,11 @@ static const struct {
+ } ide_cmd_table[0x100] = {
+     /* NOP not implemented, mandatory for CD */
+     [CFA_REQ_EXT_ERROR_CODE]      = { cmd_cfa_req_ext_error_code, CFA_OK },
+-    [WIN_DSM]                     = { cmd_data_set_management, ALL_OK },
++    [WIN_DSM]                     = { cmd_data_set_management, HD_CFA_OK },
+     [WIN_DEVICE_RESET]            = { cmd_device_reset, CD_OK },
+     [WIN_RECAL]                   = { cmd_nop, HD_CFA_OK | SET_DSC},
+     [WIN_READ]                    = { cmd_read_pio, ALL_OK },
+-    [WIN_READ_ONCE]               = { cmd_read_pio, ALL_OK },
++    [WIN_READ_ONCE]               = { cmd_read_pio, HD_CFA_OK },
+     [WIN_READ_EXT]                = { cmd_read_pio, HD_CFA_OK },
+     [WIN_READDMA_EXT]             = { cmd_read_dma, HD_CFA_OK },
+     [WIN_READ_NATIVE_MAX_EXT]     = { cmd_read_native_max, HD_CFA_OK | SET_DSC },
+@@ -1769,12 +1769,12 @@ static const struct {
+     [CFA_TRANSLATE_SECTOR]        = { cmd_cfa_translate_sector, CFA_OK },
+     [WIN_DIAGNOSE]                = { cmd_exec_dev_diagnostic, ALL_OK },
+     [WIN_SPECIFY]                 = { cmd_nop, HD_CFA_OK | SET_DSC },
+-    [WIN_STANDBYNOW2]             = { cmd_nop, ALL_OK },
+-    [WIN_IDLEIMMEDIATE2]          = { cmd_nop, ALL_OK },
+-    [WIN_STANDBY2]                = { cmd_nop, ALL_OK },
+-    [WIN_SETIDLE2]                = { cmd_nop, ALL_OK },
+-    [WIN_CHECKPOWERMODE2]         = { cmd_check_power_mode, ALL_OK | SET_DSC },
+-    [WIN_SLEEPNOW2]               = { cmd_nop, ALL_OK },
++    [WIN_STANDBYNOW2]             = { cmd_nop, HD_CFA_OK },
++    [WIN_IDLEIMMEDIATE2]          = { cmd_nop, HD_CFA_OK },
++    [WIN_STANDBY2]                = { cmd_nop, HD_CFA_OK },
++    [WIN_SETIDLE2]                = { cmd_nop, HD_CFA_OK },
++    [WIN_CHECKPOWERMODE2]         = { cmd_check_power_mode, HD_CFA_OK | SET_DSC },
++    [WIN_SLEEPNOW2]               = { cmd_nop, HD_CFA_OK },
+     [WIN_PACKETCMD]               = { cmd_packet, CD_OK },
+     [WIN_PIDENTIFY]               = { cmd_identify_packet, CD_OK },
+     [WIN_SMART]                   = { cmd_smart, HD_CFA_OK | SET_DSC },
+@@ -1788,19 +1788,19 @@ static const struct {
+     [WIN_WRITEDMA]                = { cmd_write_dma, HD_CFA_OK },
+     [WIN_WRITEDMA_ONCE]           = { cmd_write_dma, HD_CFA_OK },
+     [CFA_WRITE_MULTI_WO_ERASE]    = { cmd_write_multiple, CFA_OK },
+-    [WIN_STANDBYNOW1]             = { cmd_nop, ALL_OK },
+-    [WIN_IDLEIMMEDIATE]           = { cmd_nop, ALL_OK },
+-    [WIN_STANDBY]                 = { cmd_nop, ALL_OK },
+-    [WIN_SETIDLE1]                = { cmd_nop, ALL_OK },
+-    [WIN_CHECKPOWERMODE1]         = { cmd_check_power_mode, ALL_OK | SET_DSC },
+-    [WIN_SLEEPNOW1]               = { cmd_nop, ALL_OK },
++    [WIN_STANDBYNOW1]             = { cmd_nop, HD_CFA_OK },
++    [WIN_IDLEIMMEDIATE]           = { cmd_nop, HD_CFA_OK },
++    [WIN_STANDBY]                 = { cmd_nop, HD_CFA_OK },
++    [WIN_SETIDLE1]                = { cmd_nop, HD_CFA_OK },
++    [WIN_CHECKPOWERMODE1]         = { cmd_check_power_mode, HD_CFA_OK | SET_DSC },
++    [WIN_SLEEPNOW1]               = { cmd_nop, HD_CFA_OK },
+     [WIN_FLUSH_CACHE]             = { cmd_flush_cache, ALL_OK },
+     [WIN_FLUSH_CACHE_EXT]         = { cmd_flush_cache, HD_CFA_OK },
+     [WIN_IDENTIFY]                = { cmd_identify, ALL_OK },
+     [WIN_SETFEATURES]             = { cmd_set_features, ALL_OK | SET_DSC },
+     [IBM_SENSE_CONDITION]         = { cmd_ibm_sense_condition, CFA_OK | SET_DSC },
+     [CFA_WEAR_LEVEL]              = { cmd_cfa_erase_sectors, HD_CFA_OK | SET_DSC },
+-    [WIN_READ_NATIVE_MAX]         = { cmd_read_native_max, ALL_OK | SET_DSC },
++    [WIN_READ_NATIVE_MAX]         = { cmd_read_native_max, HD_CFA_OK | SET_DSC },
+ };
+ 
+ static bool ide_cmd_permitted(IDEState *s, uint32_t cmd)
+-- 
+2.4.3
+
diff --git a/gnu/packages/qemu.scm b/gnu/packages/qemu.scm
index b2ef95d03b..fc90346371 100644
--- a/gnu/packages/qemu.scm
+++ b/gnu/packages/qemu.scm
@@ -44,28 +44,15 @@
   ;; This is QEMU without GUI support.
   (package
     (name "qemu-headless")
-    (version "2.3.1")
+    (version "2.4.0.1")
     (source (origin
              (method url-fetch)
              (uri (string-append "http://wiki.qemu-project.org/download/qemu-"
                                  version ".tar.bz2"))
              (sha256
               (base32
-               "0px1vhkglxzjdxkkqln98znv832n1sn79g5inh3aw72216c047b6"))
-             (patches (map search-patch '("qemu-CVE-2015-3209.patch"
-                                          "qemu-CVE-2015-4037.patch"
-                                          "qemu-CVE-2015-4103.patch"
-                                          "qemu-CVE-2015-4104.patch"
-                                          "qemu-CVE-2015-4105.patch"
-                                          "qemu-CVE-2015-4106-pt1.patch"
-                                          "qemu-CVE-2015-4106-pt2.patch"
-                                          "qemu-CVE-2015-4106-pt3.patch"
-                                          "qemu-CVE-2015-4106-pt4.patch"
-                                          "qemu-CVE-2015-4106-pt5.patch"
-                                          "qemu-CVE-2015-4106-pt6.patch"
-                                          "qemu-CVE-2015-4106-pt7.patch"
-                                          "qemu-CVE-2015-4106-pt8.patch"
-                                          "qemu-CVE-2015-5745.patch")))))
+               "1nqv5p94zpnhcaqkifnn83ap7dd0qrb0qiicswbyhhby0f48pzpc"))
+             (patches (map search-patch '("qemu-CVE-2015-6855.patch")))))
     (build-system gnu-build-system)
     (arguments
      '(#:phases (alist-replace