The xvid from shiftmediaproject

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Unofficial XVid with added custom native Visual Studio project build tools. Xvid: A high performance and high quality MPEG-4 video de-/encoding solution.

License: GNU General Public License v2.0

Makefile 0.66% Shell 0.10% C++ 3.72% C 63.03% Assembly 32.03% Python 0.39% Batchfile 0.08%

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Bug report

Hi, I am reporting a bug found by xvid libfuzzer.
*This bug was found by Arash Aleebrahim of fuzzcoin project (https://fuzzcoin.kr)

Following is the address sanitizer report (oob memory read while decoding a frame).
I also attached the testcase and libfuzzer binary for reproduction.
test environment: Ubuntu 16.04, x64.

INFO: Seed: 2794480831
INFO: Loaded 1 modules   (9113 inline 8-bit counters): 9113 [0x8dc380, 0x8de719),
INFO: Loaded 1 PC tables (9113 PCs): 9113 [0x8de720,0x9020b0),
./target.bin: Running 1 inputs 1 time(s) each.
Running: ../crashes/cb6f986b840fc0440737ee29ea2e8932413e4173
AddressSanitizer:DEADLYSIGNAL
=================================================================
==32232==ERROR: AddressSanitizer: SEGV on unknown address 0x62e100000d5f (pc 0x00000058097f bp 0x7ffbffffa630 sp 0x7ffbffffa5b0 T0)
==32232==The signal is caused by a READ memory access.
    #0 0x58097f in image_setedges /src/trunk/xvidcore/build/generic/../../src/image/image.c:202:43
    #1 0x5f4351 in decoder_pframe /src/trunk/xvidcore/build/generic/../../src/decoder.c:957:5
    #2 0x5f13cb in decoder_decode /src/trunk/xvidcore/build/generic/../../src/decoder.c
    #3 0x5529ce in xvid_decore /src/trunk/xvidcore/build/generic/../../src/xvid.c:853:10
    #4 0x5508e5 in LLVMFuzzerTestOneInput /src/oss-fuzz-fuzzers/xvid/fuzzer.cpp:72:32
    #5 0x4584b4 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:563:15
    #6 0x443972 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:293:6
    #7 0x4492e6 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:783:9
    #8 0x472902 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:19:10
    #9 0x7efbfe526b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
    #10 0x41e1a8 in _start (/home/daehee/masters/xvid/targets/xvid/docker/target.bin+0x41e1a8)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /src/trunk/xvidcore/build/generic/../../src/image/image.c:202:43 in image_setedges
==32232==ABORTING

cb6f986b840fc0440737ee29ea2e8932413e4173.zip
xvidlibfuzzer.zip

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