Opened 5 years ago
Closed 5 years ago
#8289 closed defect (fixed)
left shift of 1 by 31 places cannot be represented in type 'int' at libavfilter/avf_abitscope.c:145
Reported by: | Suhwan | Owned by: | |
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Priority: | normal | Component: | undetermined |
Version: | git-master | Keywords: | ubsan |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | no | |
Analyzed by developer: | no |
Description
Summary of the bug:
There is a left shift of 1 by 31 places cannot be represented in type 'int' at libavfilter/avf_abitscope.c:145
I compiled ffmpeg with "--toolchain=clang-usan" to check the undefined-behaviours and attached log file.
How to reproduce:
% ffmpeg_g -y -i $PoC -filter_complex abitscope -loglevel 0 tmp.rm ffmpeg version N-95399-g1a0c584abc Copyright (c) 2000-2019 the FFmpeg developers built with clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final) configuration: --cc=clang --cxx=clang++ --ld=clang --enable-debug --toolchain=clang-usan
Here's UBSAN log
libavfilter/avf_abitscope.c:145:25: runtime error: left shift of 1 by 31 places cannot be represented in type 'int' Thread 1 "ffmpeg_g" hit Breakpoint 1, 0x00000000004288b0 in __ubsan::ScopedReport::~ScopedReport() () (gdb) bt #0 0x00000000004288b0 in __ubsan::ScopedReport::~ScopedReport() () #1 0x000000000042a9a0 in handleShiftOutOfBoundsImpl(__ubsan::ShiftOutOfBoundsData*, unsigned long, unsigned long, __ubsan::ReportOptions) () #2 0x000000000042cb41 in __ubsan_handle_shift_out_of_bounds () #3 0x000000000050e01c in count_bits (s=0x9412b80, sample=4294967265, max=<optimized out>) at libavfilter/avf_abitscope.c:145 #4 0x000000000050bcb7 in filter_frame (inlink=<optimized out>, insamples=<optimized out>) at libavfilter/avf_abitscope.c:203 #5 activate (ctx=<optimized out>) at libavfilter/avf_abitscope.c:238 #6 0x00000000005ce2ec in ff_filter_activate (filter=<optimized out>) at libavfilter/avfilter.c:1442 #7 0x00000000005f42bf in push_frame (graph=0x93c6200) at libavfilter/buffersrc.c:187 #8 av_buffersrc_add_frame_internal (ctx=<optimized out>, frame=0x9405640, flags=<optimized out>) at libavfilter/buffersrc.c:261 #9 0x00000000005f2e7e in av_buffersrc_add_frame_flags (ctx=0x9413100, frame=0x9405640, flags=4) at libavfilter/buffersrc.c:170 #10 0x00000000004cad60 in ifilter_send_frame (ifilter=<optimized out>, frame=<optimized out>) at fftools/ffmpeg.c:2186 #11 send_frame_to_filters (ist=0x93b45c0, decoded_frame=0x9405400) at fftools/ffmpeg.c:2260 #12 0x000000000049ba81 in decode_audio (ist=<optimized out>, pkt=<optimized out>, got_output=<optimized out>, decode_failed=<optimized out>) at fftools/ffmpeg.c:2327 #13 process_input_packet (ist=<optimized out>, pkt=0x7fffffffc9b0, no_eof=0) at fftools/ffmpeg.c:2609 #14 0x00000000004bf0f0 in process_input (file_index=<optimized out>) at fftools/ffmpeg.c:4508 #15 0x000000000048d5eb in transcode_step () at fftools/ffmpeg.c:4628 #16 transcode () at fftools/ffmpeg.c:4682 #17 0x0000000000487da4 in main (argc=9, argv=<optimized out>) at fftools/ffmpeg.c:4884
Please confirm.
Thanks
Attachments (1)
Change History (2)
by , 5 years ago
Attachment: | PoC_avf_abitscope_145.wma added |
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comment:1 by , 5 years ago
Resolution: | → fixed |
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Status: | new → closed |
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