gnu: qemu: Fix CVE-2017-{10664,10806,10911,11434}.

* gnu/packages/patches/qemu-CVE-2017-10664.patch,
gnu/packages/patches/qemu-CVE-2017-10806.patch,
gnu/packages/patches/qemu-CVE-2017-10911.patch,
gnu/packages/patches/qemu-CVE-2017-11434.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/virtualization.scm (qemu)[source]: Use them.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/gnu/packages/patches/qemu-CVE-2017-10911.patch b/gnu/packages/patches/qemu-CVE-2017-10911.patch
new file mode 100644
index 0000000000..1dcb860a2d
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2017-10911.patch
@@ -0,0 +1,106 @@
+Fix CVE-2017-10911:
+
+https://xenbits.xen.org/xsa/advisory-216.html
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-10911
+https://security-tracker.debian.org/tracker/CVE-2017-10911
+
+Patch copied from Xen Security Advisory:
+
+https://xenbits.xen.org/xsa/xsa216-qemuu.patch
+
+--- a/hw/block/xen_blkif.h
++++ b/hw/block/xen_blkif.h
+@@ -14,9 +14,6 @@
+ struct blkif_common_request {
+     char dummy;
+ };
+-struct blkif_common_response {
+-    char dummy;
+-};
+ 
+ /* i386 protocol version */
+ #pragma pack(push, 4)
+@@ -36,13 +33,7 @@ struct blkif_x86_32_request_discard {
+     blkif_sector_t sector_number;    /* start sector idx on disk (r/w only)  */
+     uint64_t       nr_sectors;       /* # of contiguous sectors to discard   */
+ };
+-struct blkif_x86_32_response {
+-    uint64_t        id;              /* copied from request */
+-    uint8_t         operation;       /* copied from request */
+-    int16_t         status;          /* BLKIF_RSP_???       */
+-};
+ typedef struct blkif_x86_32_request blkif_x86_32_request_t;
+-typedef struct blkif_x86_32_response blkif_x86_32_response_t;
+ #pragma pack(pop)
+ 
+ /* x86_64 protocol version */
+@@ -62,20 +53,14 @@ struct blkif_x86_64_request_discard {
+     blkif_sector_t sector_number;    /* start sector idx on disk (r/w only)  */
+     uint64_t       nr_sectors;       /* # of contiguous sectors to discard   */
+ };
+-struct blkif_x86_64_response {
+-    uint64_t       __attribute__((__aligned__(8))) id;
+-    uint8_t         operation;       /* copied from request */
+-    int16_t         status;          /* BLKIF_RSP_???       */
+-};
+ typedef struct blkif_x86_64_request blkif_x86_64_request_t;
+-typedef struct blkif_x86_64_response blkif_x86_64_response_t;
+ 
+ DEFINE_RING_TYPES(blkif_common, struct blkif_common_request,
+-                  struct blkif_common_response);
++                  struct blkif_response);
+ DEFINE_RING_TYPES(blkif_x86_32, struct blkif_x86_32_request,
+-                  struct blkif_x86_32_response);
++                  struct blkif_response QEMU_PACKED);
+ DEFINE_RING_TYPES(blkif_x86_64, struct blkif_x86_64_request,
+-                  struct blkif_x86_64_response);
++                  struct blkif_response);
+ 
+ union blkif_back_rings {
+     blkif_back_ring_t        native;
+--- a/hw/block/xen_disk.c
++++ b/hw/block/xen_disk.c
+@@ -769,31 +769,30 @@ static int blk_send_response_one(struct
+     struct XenBlkDev  *blkdev = ioreq->blkdev;
+     int               send_notify   = 0;
+     int               have_requests = 0;
+-    blkif_response_t  resp;
+-    void              *dst;
+-
+-    resp.id        = ioreq->req.id;
+-    resp.operation = ioreq->req.operation;
+-    resp.status    = ioreq->status;
++    blkif_response_t  *resp;
+ 
+     /* Place on the response ring for the relevant domain. */
+     switch (blkdev->protocol) {
+     case BLKIF_PROTOCOL_NATIVE:
+-        dst = RING_GET_RESPONSE(&blkdev->rings.native, blkdev->rings.native.rsp_prod_pvt);
++        resp = RING_GET_RESPONSE(&blkdev->rings.native,
++                                 blkdev->rings.native.rsp_prod_pvt);
+         break;
+     case BLKIF_PROTOCOL_X86_32:
+-        dst = RING_GET_RESPONSE(&blkdev->rings.x86_32_part,
+-                                blkdev->rings.x86_32_part.rsp_prod_pvt);
++        resp = RING_GET_RESPONSE(&blkdev->rings.x86_32_part,
++                                 blkdev->rings.x86_32_part.rsp_prod_pvt);
+         break;
+     case BLKIF_PROTOCOL_X86_64:
+-        dst = RING_GET_RESPONSE(&blkdev->rings.x86_64_part,
+-                                blkdev->rings.x86_64_part.rsp_prod_pvt);
++        resp = RING_GET_RESPONSE(&blkdev->rings.x86_64_part,
++                                 blkdev->rings.x86_64_part.rsp_prod_pvt);
+         break;
+     default:
+-        dst = NULL;
+         return 0;
+     }
+-    memcpy(dst, &resp, sizeof(resp));
++
++    resp->id        = ioreq->req.id;
++    resp->operation = ioreq->req.operation;
++    resp->status    = ioreq->status;
++
+     blkdev->rings.common.rsp_prod_pvt++;
+ 
+     RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&blkdev->rings.common, send_notify);