a0f61528af
CVE-2016-7909: pcnet: Infinite loop in pcnet_rdra_addr (bz #1381196) CVE-2016-7994: virtio-gpu: memory leak in resource_create_2d (bz #1382667) CVE-2016-8577: 9pfs: host memory leakage in v9fs_read (bz #1383286) CVE-2016-8578: 9pfs: potential NULL dereferencein 9pfs routines (bz #1383292) CVE-2016-8668: OOB buffer access in rocker switch emulation (bz #1384898) CVE-2016-8669: divide by zero error in serial_update_parameters (bz #1384911) CVE-2016-8909: intel-hda: infinite loop in dma buffer stream (bz #1388053) Infinite loop vulnerability in a9_gtimer_update (bz #1388300) CVE-2016-9101: eepro100: memory leakage at device unplug (bz #1389539) CVE-2016-9103: 9pfs: information leakage via xattr (bz #1389643) CVE-2016-9102: 9pfs: memory leakage when creating extended attribute (bz #1389551) CVE-2016-9104: 9pfs: integer overflow leading to OOB access (bz #1389687) CVE-2016-9105: 9pfs: memory leakage in v9fs_link (bz #1389704) CVE-2016-9106: 9pfs: memory leakage in v9fs_write (bz #1389713) CVE-2016-9381: xen: incautious about shared ring processing (bz #1397385) CVE-2016-9921: Divide by zero vulnerability in cirrus_do_copy (bz #1399054) CVE-2016-9776: infinite loop while receiving data in mcf_fec_receive (bz #1400830) CVE-2016-9845: information leakage in virgl_cmd_get_capset_info (bz #1402247) CVE-2016-9846: virtio-gpu: memory leakage while updating cursor data (bz #1402258) CVE-2016-9907: usbredir: memory leakage when destroying redirector (bz #1402266) CVE-2016-9911: usb: ehci: memory leakage in ehci_init_transfer (bz #1402273) CVE-2016-9913: 9pfs: memory leakage via proxy/handle callbacks (bz #1402277) CVE-2016-10028: virtio-gpu-3d: OOB access while reading virgl capabilities (bz #1406368) CVE-2016-9908: virtio-gpu: information leakage in virgl_cmd_get_capset (bz #1402263) CVE-2016-9912: virtio-gpu: memory leakage when destroying gpu resource (bz #1402285)
74 lines
2.7 KiB
Diff
74 lines
2.7 KiB
Diff
From: Prasad J Pandit <pjp@fedoraproject.org>
|
|
Date: Tue, 18 Oct 2016 13:15:17 +0530
|
|
Subject: [PATCH] display: cirrus: check vga bits per pixel(bpp) value
|
|
|
|
In Cirrus CLGD 54xx VGA Emulator, if cirrus graphics mode is VGA,
|
|
'cirrus_get_bpp' returns zero(0), which could lead to a divide
|
|
by zero error in while copying pixel data. The same could occur
|
|
via blit pitch values. Add check to avoid it.
|
|
|
|
Reported-by: Huawei PSIRT <psirt@huawei.com>
|
|
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
|
|
Message-id: 1476776717-24807-1-git-send-email-ppandit@redhat.com
|
|
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
|
|
(cherry picked from commit 4299b90e9ba9ce5ca9024572804ba751aa1a7e70)
|
|
---
|
|
hw/display/cirrus_vga.c | 14 ++++++++++----
|
|
1 file changed, 10 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c
|
|
index 3d712d5..bdb092e 100644
|
|
--- a/hw/display/cirrus_vga.c
|
|
+++ b/hw/display/cirrus_vga.c
|
|
@@ -272,6 +272,9 @@ static void cirrus_update_memory_access(CirrusVGAState *s);
|
|
static bool blit_region_is_unsafe(struct CirrusVGAState *s,
|
|
int32_t pitch, int32_t addr)
|
|
{
|
|
+ if (!pitch) {
|
|
+ return true;
|
|
+ }
|
|
if (pitch < 0) {
|
|
int64_t min = addr
|
|
+ ((int64_t)s->cirrus_blt_height-1) * pitch;
|
|
@@ -715,7 +718,7 @@ static int cirrus_bitblt_videotovideo_patterncopy(CirrusVGAState * s)
|
|
s->cirrus_addr_mask));
|
|
}
|
|
|
|
-static void cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h)
|
|
+static int cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h)
|
|
{
|
|
int sx = 0, sy = 0;
|
|
int dx = 0, dy = 0;
|
|
@@ -729,6 +732,9 @@ static void cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h)
|
|
int width, height;
|
|
|
|
depth = s->vga.get_bpp(&s->vga) / 8;
|
|
+ if (!depth) {
|
|
+ return 0;
|
|
+ }
|
|
s->vga.get_resolution(&s->vga, &width, &height);
|
|
|
|
/* extra x, y */
|
|
@@ -783,6 +789,8 @@ static void cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h)
|
|
cirrus_invalidate_region(s, s->cirrus_blt_dstaddr,
|
|
s->cirrus_blt_dstpitch, s->cirrus_blt_width,
|
|
s->cirrus_blt_height);
|
|
+
|
|
+ return 1;
|
|
}
|
|
|
|
static int cirrus_bitblt_videotovideo_copy(CirrusVGAState * s)
|
|
@@ -790,11 +798,9 @@ static int cirrus_bitblt_videotovideo_copy(CirrusVGAState * s)
|
|
if (blit_is_unsafe(s))
|
|
return 0;
|
|
|
|
- cirrus_do_copy(s, s->cirrus_blt_dstaddr - s->vga.start_addr,
|
|
+ return cirrus_do_copy(s, s->cirrus_blt_dstaddr - s->vga.start_addr,
|
|
s->cirrus_blt_srcaddr - s->vga.start_addr,
|
|
s->cirrus_blt_width, s->cirrus_blt_height);
|
|
-
|
|
- return 1;
|
|
}
|
|
|
|
/***************************************
|