#11693: [Security] heap-buffer-overflow on output.c:1740
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Reporter: flyfish101 | Type: defect
Status: new | Priority: important
Component: swscale | Version: git-master
Keywords: fuzz | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
{{{
fuzz@Fuzz2:~/Desktop/projects_oss/FFmpeg/tools/fuzzout/sws_fuzz$
./target_sws_fuzzer1072
/home/fuzz/Desktop/projects_oss/FFmpeg/tools/fuzzout/sws_fuzz/out_sws_1072/default/crashes/id:000005,sig:06,src:000722_time:492556_execs:367251_op:havoc_rep:4
Reading 145 bytes from
/home/fuzz/Desktop/projects_oss/FFmpeg/tools/fuzzout/sws_fuzz/out_sws_1072/default/crashes/id:000005,sig:06,src:000722_time:492556_execs:367251_op:havoc_rep:4
[swscaler @ 0x62f000000400] full chroma interpolation for destination
format 'rgb555le' not yet implemented
[swscaler @ 0x62f000000400] full chroma interpolation for destination
format 'rgb555le' not yet implemented
=================================================================
==3988335==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6090000016e6 at pc 0x555555fa84d6 bp 0x7fffffffc220 sp 0x7fffffffc218
WRITE of size 2 at 0x6090000016e6 thread T0
#0 0x555555fa84d5 in yuv2rgb_write
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/output.c:1740:25
#1 0x555555fa84d5 in yuv2rgb_X_c_template
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/output.c:1830:9
#2 0x555555fa84d5 in yuv2rgb15_X_c
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/output.c:1983:1
#3 0x5555559e892d in packed_vscale
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/vscale.c:166:9
#4 0x555555970cf7 in ff_swscale
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/swscale.c:531:13
#5 0x555555997df4 in scale_internal
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/swscale.c:1165:15
#6 0x5555559a536a in sws_scale
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/swscale.c:1514:12
#7 0x55555596705d in LLVMFuzzerTestOneInput
/home/fuzz/Desktop/projects_oss/FFmpeg/tools/./target_sws_fuzzer1072.c:76:5
#8 0x55555595e37d in ExecuteFilesOnyByOne
/home/fuzz/Desktop/DDGF_Project/AFLplusplus/utils/aflpp_driver/aflpp_driver.c:255:7
#9 0x55555595e188 in LLVMFuzzerRunDriver
/home/fuzz/Desktop/DDGF_Project/AFLplusplus/utils/aflpp_driver/aflpp_driver.c
#10 0x55555595dd48 in main
/home/fuzz/Desktop/DDGF_Project/AFLplusplus/utils/aflpp_driver/aflpp_driver.c:300:10
#11 0x7ffff7c3b082 in __libc_start_main /build/glibc-
B3wQXB/glibc-2.31/csu/../csu/libc-start.c:308:16
#12 0x555555868fdd in _start
(/home/fuzz/Desktop/projects_oss/FFmpeg/tools/fuzzout/sws_fuzz/target_sws_fuzzer1072+0x314fdd)
0x6090000016e7 is located 0 bytes to the right of 39-byte region
[0x6090000016c0,0x6090000016e7)
allocated by thread T0 here:
#0 0x55555591851c in posix_memalign /home/fuzz/Desktop/fuzz-
introspector/build/llvm-project/compiler-
rt/lib/asan/asan_malloc_linux.cpp:145:3
#1 0x555556371314 in av_malloc
/home/fuzz/Desktop/projects_oss/FFmpeg/libavutil/mem.c:107:9
#2 0x555556358a16 in av_image_alloc
/home/fuzz/Desktop/projects_oss/FFmpeg/libavutil/imgutils.c:248:11
#3 0x55555596633c in LLVMFuzzerTestOneInput
/home/fuzz/Desktop/projects_oss/FFmpeg/tools/./target_sws_fuzzer1072.c:65:9
#4 0x55555595e37d in ExecuteFilesOnyByOne
/home/fuzz/Desktop/DDGF_Project/AFLplusplus/utils/aflpp_driver/aflpp_driver.c:255:7
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/fuzz/Desktop/projects_oss/FFmpeg/libswscale/output.c:1740:25 in
yuv2rgb_write
Shadow bytes around the buggy address:
0x0c127fff8280: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff8290: 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff82a0: 00 fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff82b0: 00 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff82c0: 00 00 00 fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c127fff82d0: fa fa fa fa fa fa fa fa 00 00 00 00[07]fa fa fa
0x0c127fff82e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff82f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff8300: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff8310: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c127fff8320: 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
==3988335==ABORTING
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11693>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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