diff options
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2017-8379.patch')
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2017-8379.patch | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2017-8379.patch b/gnu/packages/patches/qemu-CVE-2017-8379.patch new file mode 100644 index 0000000000..200b133d3e --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2017-8379.patch @@ -0,0 +1,98 @@ +Fix CVE-2017-8379: + +https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8379 + +Patch copied from upstream source repository: + +http://git.qemu.org/?p=qemu.git;a=commitdiff;h=fa18f36a461984eae50ab957e47ec78dae3c14fc + +From fa18f36a461984eae50ab957e47ec78dae3c14fc Mon Sep 17 00:00:00 2001 +From: Gerd Hoffmann <kraxel@redhat.com> +Date: Fri, 28 Apr 2017 10:42:37 +0200 +Subject: [PATCH] input: limit kbd queue depth + +Apply a limit to the number of items we accept into the keyboard queue. + +Impact: Without this limit vnc clients can exhaust host memory by +sending keyboard events faster than qemu feeds them to the guest. + +Fixes: CVE-2017-8379 +Cc: P J P <ppandit@redhat.com> +Cc: Huawei PSIRT <PSIRT@huawei.com> +Reported-by: jiangxin1@huawei.com +Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> +Message-id: 20170428084237.23960-1-kraxel@redhat.com +--- + ui/input.c | 14 +++++++++++--- + 1 file changed, 11 insertions(+), 3 deletions(-) + +diff --git a/ui/input.c b/ui/input.c +index ed88cda6d6..fb1f404095 100644 +--- a/ui/input.c ++++ b/ui/input.c +@@ -41,6 +41,8 @@ static QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue) kbd_queue = + QTAILQ_HEAD_INITIALIZER(kbd_queue); + static QEMUTimer *kbd_timer; + static uint32_t kbd_default_delay_ms = 10; ++static uint32_t queue_count; ++static uint32_t queue_limit = 1024; + + QemuInputHandlerState *qemu_input_handler_register(DeviceState *dev, + QemuInputHandler *handler) +@@ -268,6 +270,7 @@ static void qemu_input_queue_process(void *opaque) + break; + } + QTAILQ_REMOVE(queue, item, node); ++ queue_count--; + g_free(item); + } + } +@@ -282,6 +285,7 @@ static void qemu_input_queue_delay(struct QemuInputEventQueueHead *queue, + item->delay_ms = delay_ms; + item->timer = timer; + QTAILQ_INSERT_TAIL(queue, item, node); ++ queue_count++; + + if (start_timer) { + timer_mod(item->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +@@ -298,6 +302,7 @@ static void qemu_input_queue_event(struct QemuInputEventQueueHead *queue, + item->src = src; + item->evt = evt; + QTAILQ_INSERT_TAIL(queue, item, node); ++ queue_count++; + } + + static void qemu_input_queue_sync(struct QemuInputEventQueueHead *queue) +@@ -306,6 +311,7 @@ static void qemu_input_queue_sync(struct QemuInputEventQueueHead *queue) + + item->type = QEMU_INPUT_QUEUE_SYNC; + QTAILQ_INSERT_TAIL(queue, item, node); ++ queue_count++; + } + + void qemu_input_event_send_impl(QemuConsole *src, InputEvent *evt) +@@ -381,7 +387,7 @@ void qemu_input_event_send_key(QemuConsole *src, KeyValue *key, bool down) + qemu_input_event_send(src, evt); + qemu_input_event_sync(); + qapi_free_InputEvent(evt); +- } else { ++ } else if (queue_count < queue_limit) { + qemu_input_queue_event(&kbd_queue, src, evt); + qemu_input_queue_sync(&kbd_queue); + } +@@ -409,8 +415,10 @@ void qemu_input_event_send_key_delay(uint32_t delay_ms) + kbd_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, qemu_input_queue_process, + &kbd_queue); + } +- qemu_input_queue_delay(&kbd_queue, kbd_timer, +- delay_ms ? delay_ms : kbd_default_delay_ms); ++ if (queue_count < queue_limit) { ++ qemu_input_queue_delay(&kbd_queue, kbd_timer, ++ delay_ms ? delay_ms : kbd_default_delay_ms); ++ } + } + + InputEvent *qemu_input_event_new_btn(InputButton btn, bool down) +-- +2.13.0 + |