b352b57655
* gnu/packages/qemu.scm (qemu)[source]: Add patches. * gnu/packages/patches/qemu-CVE-2017-2615, gnu/packages/patches/qemu-CVE-2017-5578, gnu/packages/patches/qemu-CVE-2017-5579, gnu/packages/patches/qemu-CVE-2017-5856: New files. * gnu/local.mk (dist_patch_DATA): Register them.
53 lines
1.8 KiB
Diff
53 lines
1.8 KiB
Diff
http://git.qemu.org/?p=qemu.git;a=patch;h=62d4c6bd5263bb8413a06c80144fc678df6dfb64
|
|
this patch is from qemu-git.
|
|
|
|
|
|
From 62d4c6bd5263bb8413a06c80144fc678df6dfb64 Mon Sep 17 00:00:00 2001
|
|
From: Li Qiang <liqiang6-s@360.cn>
|
|
Date: Wed, 1 Feb 2017 09:35:01 +0100
|
|
Subject: [PATCH] cirrus: fix oob access issue (CVE-2017-2615)
|
|
|
|
When doing bitblt copy in backward mode, we should minus the
|
|
blt width first just like the adding in the forward mode. This
|
|
can avoid the oob access of the front of vga's vram.
|
|
|
|
Signed-off-by: Li Qiang <liqiang6-s@360.cn>
|
|
|
|
{ kraxel: with backward blits (negative pitch) addr is the topmost
|
|
address, so check it as-is against vram size ]
|
|
|
|
Cc: qemu-stable@nongnu.org
|
|
Cc: P J P <ppandit@redhat.com>
|
|
Cc: Laszlo Ersek <lersek@redhat.com>
|
|
Cc: Paolo Bonzini <pbonzini@redhat.com>
|
|
Cc: Wolfgang Bumiller <w.bumiller@proxmox.com>
|
|
Fixes: d3532a0db02296e687711b8cdc7791924efccea0 (CVE-2014-8106)
|
|
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
|
|
Message-id: 1485938101-26602-1-git-send-email-kraxel@redhat.com
|
|
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
|
|
---
|
|
hw/display/cirrus_vga.c | 7 +++----
|
|
1 file changed, 3 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
|
|
index 7db6409dc5..16f27e8ac5 100644
|
|
--- a/hw/display/cirrus_vga.c
|
|
+++ b/hw/display/cirrus_vga.c
|
|
@@ -274,10 +274,9 @@ static bool blit_region_is_unsafe(struct CirrusVGAState *s,
|
|
{
|
|
if (pitch < 0) {
|
|
int64_t min = addr
|
|
- + ((int64_t)s->cirrus_blt_height-1) * pitch;
|
|
- int32_t max = addr
|
|
- + s->cirrus_blt_width;
|
|
- if (min < 0 || max > s->vga.vram_size) {
|
|
+ + ((int64_t)s->cirrus_blt_height - 1) * pitch
|
|
+ - s->cirrus_blt_width;
|
|
+ if (min < -1 || addr >= s->vga.vram_size) {
|
|
return true;
|
|
}
|
|
} else {
|
|
--
|
|
2.11.0
|
|
|