diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-11-01 00:53:39 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-11-01 00:53:39 +0000 |
| commit | 65d35a09979e63541afc5bfc595b9f1b1b4ae069 (patch) | |
| tree | 5098bbe7aae32fcc729cb89a77ed75a1f9773045 /hw/cirrus_vga.c | |
| parent | 6d17c604c0fb35dd7d02b60dd99ce882264e68e5 (diff) | |
| download | qemu-65d35a09979e63541afc5bfc595b9f1b1b4ae069.zip qemu-65d35a09979e63541afc5bfc595b9f1b1b4ae069.tar.gz qemu-65d35a09979e63541afc5bfc595b9f1b1b4ae069.tar.bz2 | |
CVE-2008-4539: fix a heap overflow in Cirrus emulation
The code in hw/cirrus_vga.c has changed a lot between CVE-2007-1320 has
been announced and the patch has been applied. As a consequence it has
wrongly applied and QEMU is still vulnerable to this bug if using VNC.
(noticed by Jan Niehusmann)
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5587 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw/cirrus_vga.c')
| -rw-r--r-- | hw/cirrus_vga.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c index 55f3ced..af9c9e6 100644 --- a/hw/cirrus_vga.c +++ b/hw/cirrus_vga.c @@ -785,15 +785,14 @@ static void cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h) static int cirrus_bitblt_videotovideo_copy(CirrusVGAState * s) { + if (BLTUNSAFE(s)) + return 0; + if (s->ds->dpy_copy) { cirrus_do_copy(s, s->cirrus_blt_dstaddr - s->start_addr, s->cirrus_blt_srcaddr - s->start_addr, s->cirrus_blt_width, s->cirrus_blt_height); } else { - - if (BLTUNSAFE(s)) - return 0; - (*s->cirrus_rop) (s, s->vram_ptr + (s->cirrus_blt_dstaddr & s->cirrus_addr_mask), s->vram_ptr + |