==19652==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x606000000118 at pc 0x0000004dd09d bp 0x7ffd61fa7590 sp 0x7ffd61fa6d40
READ of size 132 at 0x606000000118 thread T0
#0 0x4dd09c in __asan_memcpy /home/mcgrady/wyh/llvm/llvm-6.0.0.src/projects/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cc:23
#1 0x51771a in GetByteStr /opt/disk/marsman/test/ngiflib/build_asan/ngiflib.c:108:3
#2 0x51771a in LoadGif /opt/disk/marsman/test/ngiflib/build_asan/ngiflib.c:716
#3 0x5161b5 in main /opt/disk/marsman/test/ngiflib/build_asan/gif2tga.c:95:10
#4 0x7f3de58ea83f in __libc_start_main /build/glibc-S7Ft5T/glibc-2.23/csu/../csu/libc-start.c:291
#5 0x419fe8 in _start (/opt/disk/marsman/test/ngiflib/bin_asan/bin/gif2tga+0x419fe8)
0x606000000118 is located 0 bytes to the right of 56-byte region [0x6060000000e0,0x606000000118)
allocated by thread T0 here:
#0 0x4de218 in __interceptor_malloc /home/mcgrady/wyh/llvm/llvm-6.0.0.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:88
#1 0x516021 in main /opt/disk/marsman/test/ngiflib/build_asan/gif2tga.c:75:11
#2 0x7f3de58ea83f in __libc_start_main /build/glibc-S7Ft5T/glibc-2.23/csu/../csu/libc-start.c:291
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/mcgrady/wyh/llvm/llvm-6.0.0.src/projects/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cc:23 in __asan_memcpy
Shadow bytes around the buggy address:
0x0c0c7fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c0c7fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c0c7fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c0c7fff8000: fa fa fa fa fd fd fd fd fd fd fd fa fa fa fa fa
0x0c0c7fff8010: 00 00 00 00 00 00 00 01 fa fa fa fa 00 00 00 00
=>0x0c0c7fff8020: 00 00 00[fa]fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c0c7fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==19652==ABORTING
The text was updated successfully, but these errors were encountered:
Similar to #18, this Overflow problem is because in NGIFLIB_NO_FILE mode,
GetByteStr()copy memory buffer without checking the boundary.Test Environment
Ubuntu 16.04, 64bit
ngiflib(master 0245fd4)
How to trigger
CC="clang -fsanitize=address -g" CFLAGS+=-DNGIFLIB_NO_FILE make$ ./gif2tga --outbase /dev/null $POCPOC file
https://github.com/Marsman1996/pocs/raw/master/ngiflib/poc-ngiflib-0245fd4-GetByteStr-overflow
Details
ASAN report
The text was updated successfully, but these errors were encountered: