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projects/ffmpeg/oss-fuzz_42537705/crash.log
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INFO: Running with entropic power schedule (0xFF, 100).
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INFO: Seed: 2823803343
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INFO: Loaded 1 modules (64426 inline 8-bit counters): 64426 [0x55c452f53ee8, 0x55c452f63a92),
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INFO: Loaded 1 PC tables (64426 PCs): 64426 [0x55c452f63a98,0x55c45305f538),
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/out/ffmpeg_AV_CODEC_ID_MSMPEG4V1_fuzzer: Running 1 inputs 1 time(s) each.
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Running: /tmp/poc
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==90557==WARNING: MemorySanitizer: use-of-uninitialized-value
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#0 0x55c4526af364 in ff_msmpeg4_decode_block /src/ffmpeg/libavcodec/msmpeg4dec.c:804:9
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#1 0x55c4526a38ed in msmpeg4v12_decode_mb /src/ffmpeg/libavcodec/msmpeg4dec.c:199:13
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#2 0x55c4529c4b14 in decode_slice /src/ffmpeg/libavcodec/h263dec.c:272:19
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#3 0x55c4529c21e2 in ff_h263_decode_frame /src/ffmpeg/libavcodec/h263dec.c:616:17
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#4 0x55c45264fb0e in decode_simple_internal /src/ffmpeg/libavcodec/decode.c:435:16
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#5 0x55c45264fb0e in decode_simple_receive_frame /src/ffmpeg/libavcodec/decode.c:605:15
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#6 0x55c45264fb0e in ff_decode_receive_frame_internal /src/ffmpeg/libavcodec/decode.c:641:15
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#7 0x55c452652cfd in decode_receive_frame_internal /src/ffmpeg/libavcodec/decode.c:658:15
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#8 0x55c452652a83 in avcodec_send_packet /src/ffmpeg/libavcodec/decode.c:745:15
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#9 0x55c45263cf53 in LLVMFuzzerTestOneInput /src/ffmpeg/tools/target_dec_fuzzer.c:541:25
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#10 0x55c45252f9a0 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:614:13
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#11 0x55c45251ac15 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:327:6
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#12 0x55c4525206af in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:862:9
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#13 0x55c45254b952 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
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#14 0x7f453f7de082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082) (BuildId: 0323ab4806bee6f846d9ad4bccfc29afdca49a58)
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#15 0x55c452512dfd in _start (/out/ffmpeg_AV_CODEC_ID_MSMPEG4V1_fuzzer+0x1f8dfd)
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Uninitialized value was stored to memory at
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#0 0x55c4526af35d in ff_msmpeg4_decode_block /src/ffmpeg/libavcodec/msmpeg4dec.c:804:39
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#1 0x55c4526a38ed in msmpeg4v12_decode_mb /src/ffmpeg/libavcodec/msmpeg4dec.c:199:13
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#2 0x55c4529c4b14 in decode_slice /src/ffmpeg/libavcodec/h263dec.c:272:19
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#3 0x55c4529c21e2 in ff_h263_decode_frame /src/ffmpeg/libavcodec/h263dec.c:616:17
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#4 0x55c45264fb0e in decode_simple_internal /src/ffmpeg/libavcodec/decode.c:435:16
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#5 0x55c45264fb0e in decode_simple_receive_frame /src/ffmpeg/libavcodec/decode.c:605:15
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#6 0x55c45264fb0e in ff_decode_receive_frame_internal /src/ffmpeg/libavcodec/decode.c:641:15
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#7 0x55c452652cfd in decode_receive_frame_internal /src/ffmpeg/libavcodec/decode.c:658:15
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#8 0x55c452652a83 in avcodec_send_packet /src/ffmpeg/libavcodec/decode.c:745:15
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#9 0x55c45263cf53 in LLVMFuzzerTestOneInput /src/ffmpeg/tools/target_dec_fuzzer.c:541:25
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#10 0x55c45252f9a0 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:614:13
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#11 0x55c45251ac15 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:327:6
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#12 0x55c4525206af in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:862:9
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#13 0x55c45254b952 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
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#14 0x7f453f7de082 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24082) (BuildId: 0323ab4806bee6f846d9ad4bccfc29afdca49a58)
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Uninitialized value was created by an allocation of 'dc_pred_dir' in the stack frame
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#0 0x55c4526aa2bb in ff_msmpeg4_decode_block /src/ffmpeg/libavcodec/msmpeg4dec.c:631:5
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SUMMARY: MemorySanitizer: use-of-uninitialized-value /src/ffmpeg/libavcodec/msmpeg4dec.c:804:9 in ff_msmpeg4_decode_block
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Exiting
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projects/ffmpeg/oss-fuzz_42537705/poc.bin
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version https://git-lfs.github.com/spec/v1
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oid sha256:bd6d03129927edbf9f554fb083b840c9ee34f18cd747d6e7339c90b65b0bf013
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size 1025
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projects/ffmpeg/oss-fuzz_42537705/src.tgz
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version https://git-lfs.github.com/spec/v1
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oid sha256:bb18be5e5633bd3098691f8e8b504dbfcc3c0028c2bb1af899bc39c83cb09437
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size 1886055874
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