Opened 5 years ago
Closed 3 years ago
#8325 closed defect (worksforme)
outside the range of representable values of type 'unsigned long' at libavcodec/ratecontrol.c:966
Reported by: | Suhwan | Owned by: | |
---|---|---|---|
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 an outside the range of representable values of type 'unsigned long' at libavcodec/ratecontrol.c:966
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 framerate -target vcd -loglevel 0 -c wmv1 tmp.wsd ffmpeg version N-95517-g0b8956b25c 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
libavcodec/ratecontrol.c:966:37: runtime error: -443679 is outside the range of representable values of type 'unsigned long' Thread 1 "ffmpeg_g" hit Breakpoint 1, 0x00000000004288b0 in __ubsan::ScopedReport::~ScopedReport() () (gdb) bt #0 0x00000000004288b0 in __ubsan::ScopedReport::~ScopedReport() () #1 0x000000000042a4e6 in handleFloatCastOverflow(void*, unsigned long, __ubsan::ReportOptions) () #2 0x000000000042cd11 in __ubsan_handle_float_cast_overflow () #3 0x0000000002fa96f3 in ff_rate_estimate_qscale (s=0x93d8940, dry_run=0) at libavcodec/ratecontrol.c:966 #4 0x0000000002be940f in estimate_qp (s=0x93d8940, dry_run=0) at libavcodec/mpegvideo_enc.c:3607 #5 0x0000000002bde6a1 in encode_picture (s=0x93d8940, picture_number=30) at libavcodec/mpegvideo_enc.c:3807 #6 0x0000000002bc347a in ff_mpv_encode_picture (avctx=0x93ceb40, pkt=0x9410d40, pic_arg=<optimized out>, got_packet=0x7fffffffc2a4) at libavcodec/mpegvideo_enc.c:1868 #7 0x0000000001fe242f in avcodec_encode_video2 (avctx=0x93ceb40, avpkt=<optimized out>, frame=<optimized out>, got_packet_ptr=0x7fffffffc2a4) at libavcodec/encode.c:302 #8 0x0000000001fe4160 in do_encode (avctx=0x93ceb40, frame=0x9449f80, got_packet=0x7fffffffc2a4) at libavcodec/encode.c:371 #9 0x0000000001fe3cda in avcodec_send_frame (avctx=0x93ceb40, frame=0x9449f80) at libavcodec/encode.c:420 #10 0x00000000004c51f8 in do_video_out (of=0x93cce80, ost=<optimized out>, next_picture=<optimized out>, sync_ipts=28.500007629394535) at fftools/ffmpeg.c:1287 #11 0x00000000004c0f2b in reap_filters (flush=0) at fftools/ffmpeg.c:1504 #12 0x000000000048c3d5 in transcode_from_filter (graph=0x93c7700, best_ist=<optimized out>) at fftools/ffmpeg.c:4533 #13 transcode_step () at fftools/ffmpeg.c:4606 #14 transcode () at fftools/ffmpeg.c:4682 #15 0x0000000000487dc4 in main (argc=13, argv=<optimized out>) at fftools/ffmpeg.c:4884
Please confirm.
Thanks
Attachments (1)
Change History (2)
by , 5 years ago
comment:1 by , 3 years ago
Resolution: | → worksforme |
---|---|
Status: | new → closed |
Does not reproduce with git master for me
Note:
See TracTickets
for help on using tickets.
poc