diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/CVE-2021-3638.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/CVE-2021-3638.patch | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2021-3638.patch b/meta/recipes-devtools/qemu/qemu/CVE-2021-3638.patch new file mode 100644 index 0000000000..3cbb34c54c --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2021-3638.patch @@ -0,0 +1,88 @@ +From 205ccfd7a5ec86bd9a5678b8bd157562fc9a1643 Mon Sep 17 00:00:00 2001 +From: Philippe Mathieu-Daudé <philmd@redhat.com> +Date: Thu, 10 Aug 2023 07:30:54 +0000 +Subject: [PATCH] hw/display/ati_2d: Fix buffer overflow in ati_2d_blt + (CVE-2021-3638) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 + Content-Transfer-Encoding: 8bit +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +When building QEMU with DEBUG_ATI defined then running with +'-device ati-vga,romfile="" -d unimp,guest_errors -trace ati\*' +we get: + + ati_mm_write 4 0x16c0 DP_CNTL <- 0x1 + ati_mm_write 4 0x146c DP_GUI_MASTER_CNTL <- 0x2 + ati_mm_write 4 0x16c8 DP_MIX <- 0xff0000 + ati_mm_write 4 0x16c4 DP_DATATYPE <- 0x2 + ati_mm_write 4 0x224 CRTC_OFFSET <- 0x0 + ati_mm_write 4 0x142c DST_PITCH_OFFSET <- 0xfe00000 + ati_mm_write 4 0x1420 DST_Y <- 0x3fff + ati_mm_write 4 0x1410 DST_HEIGHT <- 0x3fff + ati_mm_write 4 0x1588 DST_WIDTH_X <- 0x3fff3fff + ati_2d_blt: vram:0x7fff5fa00000 addr:0 ds:0x7fff61273800 stride:2560 bpp:32 rop:0xff + ati_2d_blt: 0 0 0, 0 127 0, (0,0) -> (16383,16383) 16383x16383 > ^ + ati_2d_blt: pixman_fill(dst:0x7fff5fa00000, stride:254, bpp:8, x:16383, y:16383, w:16383, h:16383, xor:0xff000000) + Thread 3 "qemu-system-i38" received signal SIGSEGV, Segmentation fault. + (gdb) bt + #0 0x00007ffff7f62ce0 in sse2_fill.lto_priv () at /lib64/libpixman-1.so.0 + #1 0x00007ffff7f09278 in pixman_fill () at /lib64/libpixman-1.so.0 + #2 0x0000555557b5a9af in ati_2d_blt (s=0x631000028800) at hw/display/ati_2d.c:196 + #3 0x0000555557b4b5a2 in ati_mm_write (opaque=0x631000028800, addr=5512, data=1073692671, size=4) at hw/display/ati.c:843 + #4 0x0000555558b90ec4 in memory_region_write_accessor (mr=0x631000039cc0, addr=5512, ..., size=4, ...) at softmmu/memory.c:492 + +Commit 584acf34cb0 ("ati-vga: Fix reverse bit blts") introduced +the local dst_x and dst_y which adjust the (x, y) coordinates +depending on the direction in the SRCCOPY ROP3 operation, but +forgot to address the same issue for the PATCOPY, BLACKNESS and +WHITENESS operations, which also call pixman_fill(). + +Fix that now by using the adjusted coordinates in the pixman_fill +call, and update the related debug printf(). + +Reported-by: Qiang Liu <qiangliu@zju.edu.cn> +Fixes: 584acf34cb0 ("ati-vga: Fix reverse bit blts") +Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> +Tested-by: Mauro Matteo Cascella <mcascell@redhat.com> +Message-Id: <20210906153103.1661195-1-philmd@redhat.com> +Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> + +CVE: CVE-2021-3638 + +Upstream-Status: Backport [https://github.com/qemu/qemu/commit/205ccfd7a5ec86bd9a5678b8bd157562fc9a1643] + +Signed-off-by: Yogita Urade <yogita.urade@windriver.com> +--- + hw/display/ati_2d.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/hw/display/ati_2d.c b/hw/display/ati_2d.c +index 4dc10ea79..692bec91d 100644 +--- a/hw/display/ati_2d.c ++++ b/hw/display/ati_2d.c +@@ -84,7 +84,7 @@ void ati_2d_blt(ATIVGAState *s) + DPRINTF("%d %d %d, %d %d %d, (%d,%d) -> (%d,%d) %dx%d %c %c\n", + s->regs.src_offset, s->regs.dst_offset, s->regs.default_offset, + s->regs.src_pitch, s->regs.dst_pitch, s->regs.default_pitch, +- s->regs.src_x, s->regs.src_y, s->regs.dst_x, s->regs.dst_y, ++ s->regs.src_x, s->regs.src_y, dst_x, dst_y, + s->regs.dst_width, s->regs.dst_height, + (s->regs.dp_cntl & DST_X_LEFT_TO_RIGHT ? '>' : '<'), + (s->regs.dp_cntl & DST_Y_TOP_TO_BOTTOM ? 'v' : '^')); +@@ -180,11 +180,11 @@ void ati_2d_blt(ATIVGAState *s) + dst_stride /= sizeof(uint32_t); + DPRINTF("pixman_fill(%p, %d, %d, %d, %d, %d, %d, %x)\n", + dst_bits, dst_stride, bpp, +- s->regs.dst_x, s->regs.dst_y, ++ dst_x, dst_y, + s->regs.dst_width, s->regs.dst_height, + filler); + pixman_fill((uint32_t *)dst_bits, dst_stride, bpp, +- s->regs.dst_x, s->regs.dst_y, ++ dst_x, dst_y, + s->regs.dst_width, s->regs.dst_height, + filler); + if (dst_bits >= s->vga.vram_ptr + s->vga.vbe_start_addr && +-- +2.40.0 |