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| author | Philippe Mathieu-Daudé <f4bug@amsat.org> | 2020-05-23 21:15:15 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2020-08-26 23:04:00 +0200 |
| commit | b87a7355de04a2771c11824ea791802c052c979c (patch) | |
| tree | 7e69cd2959bc8a3f3f84f621f3e52eea278803b3 /hw/openrisc | |
| parent | b899fe41ceb9c684fa135a081f4c9749400a61d3 (diff) | |
hw/display/artist: Check offset in draw_line to avoid buffer over-run
Invalid I/O writes can craft an offset out of the vram_buffer range.
We avoid:
Program terminated with signal SIGSEGV, Segmentation fault.
284 *dst &= ~plane_mask;
(gdb) bt
#0 0x000055d5dccdc5c0 in artist_rop8 (s=0x55d5defee510, dst=0x7f8e84ed8216 <error: Cannot access memory at address 0x7f8e84ed8216>, val=0 '\000') at hw/display/artist.c:284
#1 0x000055d5dccdcf83 in fill_window (s=0x55d5defee510, startx=22, starty=5674, width=65, height=5697) at hw/display/artist.c:551
#2 0x000055d5dccddfb9 in artist_reg_write (opaque=0x55d5defee510, addr=1051140, val=4265537, size=4) at hw/display/artist.c:902
#3 0x000055d5dcb42a7c in memory_region_write_accessor (mr=0x55d5defeea10, addr=1051140, value=0x7ffe57db08c8, size=4, shift=0, mask=4294967295, attrs=...) at memory.c:483
Reported-by: LLVM libFuzzer
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'hw/openrisc')
0 files changed, 0 insertions, 0 deletions