diff options
Diffstat (limited to 'app-emulation/qemu/files/qemu-2.10.1-CVE-2017-15289.patch')
| -rw-r--r-- | app-emulation/qemu/files/qemu-2.10.1-CVE-2017-15289.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/app-emulation/qemu/files/qemu-2.10.1-CVE-2017-15289.patch b/app-emulation/qemu/files/qemu-2.10.1-CVE-2017-15289.patch new file mode 100644 index 000000000000..a4ad2d5e4359 --- /dev/null +++ b/app-emulation/qemu/files/qemu-2.10.1-CVE-2017-15289.patch @@ -0,0 +1,58 @@ +From eb38e1bc3740725ca29a535351de94107ec58d51 Mon Sep 17 00:00:00 2001 +From: Gerd Hoffmann <kraxel@redhat.com> +Date: Wed, 11 Oct 2017 10:43:14 +0200 +Subject: [PATCH] cirrus: fix oob access in mode4and5 write functions + +Move dst calculation into the loop, so we apply the mask on each +interation and will not overflow vga memory. + +Cc: Prasad J Pandit <pjp@fedoraproject.org> +Reported-by: Niu Guoxiang <niuguoxiang@huawei.com> +Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> +Message-id: 20171011084314.21752-1-kraxel@redhat.com +--- + hw/display/cirrus_vga.c | 6 ++---- + 1 file changed, 2 insertions(+), 4 deletions(-) + +diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c +index b4d579857a..bc32bf1e39 100644 +--- a/hw/display/cirrus_vga.c ++++ b/hw/display/cirrus_vga.c +@@ -2038,15 +2038,14 @@ static void cirrus_mem_writeb_mode4and5_8bpp(CirrusVGAState * s, + unsigned val = mem_value; + uint8_t *dst; + +- dst = s->vga.vram_ptr + (offset &= s->cirrus_addr_mask); + for (x = 0; x < 8; x++) { ++ dst = s->vga.vram_ptr + ((offset + x) & s->cirrus_addr_mask); + if (val & 0x80) { + *dst = s->cirrus_shadow_gr1; + } else if (mode == 5) { + *dst = s->cirrus_shadow_gr0; + } + val <<= 1; +- dst++; + } + memory_region_set_dirty(&s->vga.vram, offset, 8); + } +@@ -2060,8 +2059,8 @@ static void cirrus_mem_writeb_mode4and5_16bpp(CirrusVGAState * s, + unsigned val = mem_value; + uint8_t *dst; + +- dst = s->vga.vram_ptr + (offset &= s->cirrus_addr_mask); + for (x = 0; x < 8; x++) { ++ dst = s->vga.vram_ptr + ((offset + 2 * x) & s->cirrus_addr_mask & ~1); + if (val & 0x80) { + *dst = s->cirrus_shadow_gr1; + *(dst + 1) = s->vga.gr[0x11]; +@@ -2070,7 +2069,6 @@ static void cirrus_mem_writeb_mode4and5_16bpp(CirrusVGAState * s, + *(dst + 1) = s->vga.gr[0x10]; + } + val <<= 1; +- dst += 2; + } + memory_region_set_dirty(&s->vga.vram, offset, 16); + } +-- +2.13.6 + |