[FFmpeg-trac] #8279(undetermined:new): outside the range of representable values of type 'int' at libavfilter/vf_fftdnoiz.c:159

FFmpeg trac at avcodec.org
Tue Oct 15 18:56:09 EEST 2019


#8279: outside the range of representable values of type 'int' at
libavfilter/vf_fftdnoiz.c:159
-------------------------------------+-------------------------------------
             Reporter:  Suhwan       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  ubsan        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 There is an outside the range of representable values of type 'int' at
 libavfilter/vf_fftdnoiz.c:159

 I compiled ffmpeg with "--toolchain=clang-usan" to check the undefined-
 behaviours and attached log file.
 How to reproduce:
 {{{
 % ffmpeg_g -stream_loop 17 -y -r 81 -i $PoC -filter_complex fftdnoiz
 -target dvd -map 0 tmp.ea_cdata

 ffmpeg version N-95385-ge1b89c76f6 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/vf_fftdnoiz.c:159:32: runtime error: 1.04064e+10 is outside
 the range of representable values of type 'int'

 Thread 1 "ffmpeg_g" hit Breakpoint 1, 0x0000000000428860 in
 __ubsan::ScopedReport::~ScopedReport() ()
 (gdb) bt
 #0  0x0000000000428860 in __ubsan::ScopedReport::~ScopedReport() ()
 #1  0x000000000042a496 in handleFloatCastOverflow(void*, unsigned long,
 __ubsan::ReportOptions) ()
 #2  0x000000000042ccc1 in __ubsan_handle_float_cast_overflow ()
 #3  0x000000000097da23 in export_row8 (src=<optimized out>, dst=<optimized
 out>, rw=<optimized out>,
     scale=<optimized out>, depth=<optimized out>) at
 libavfilter/vf_fftdnoiz.c:159
 #4  0x00000000009740e1 in export_plane (s=<optimized out>, dstp=<optimized
 out>,
     buffer=<optimized out>, buffer_linesize=<optimized out>,
 dst_linesize=<optimized out>,
     plane=<optimized out>) at libavfilter/vf_fftdnoiz.c:358
 #5  filter_frame (inlink=<optimized out>, in=<optimized out>) at
 libavfilter/vf_fftdnoiz.c:599
 #6  0x00000000005cfe4d in ff_filter_frame_framed (link=<optimized out>,
 frame=0x0)
     at libavfilter/avfilter.c:1084
 #7  ff_filter_frame_to_filter (link=<optimized out>) at
 libavfilter/avfilter.c:1232
 #8  ff_filter_activate_default (filter=<optimized out>) at
 libavfilter/avfilter.c:1281
 #9  ff_filter_activate (filter=<optimized out>) at
 libavfilter/avfilter.c:1443
 #10 0x00000000005f426f in push_frame (graph=0x91111c0) at
 libavfilter/buffersrc.c:187
 #11 av_buffersrc_add_frame_internal (ctx=<optimized out>, frame=0x9149b80,
 flags=<optimized out>)
     at libavfilter/buffersrc.c:261
 #12 0x00000000005f2e2e in av_buffersrc_add_frame_flags (ctx=0x9150380,
 frame=0x9149b80, flags=4)
     at libavfilter/buffersrc.c:170
 #13 0x00000000004cad10 in ifilter_send_frame (ifilter=<optimized out>,
 frame=<optimized out>)
     at fftools/ffmpeg.c:2186
 #14 send_frame_to_filters (ist=0x910d6c0, decoded_frame=0x9149b80) at
 fftools/ffmpeg.c:2260
 #15 0x00000000004a076c in decode_video (ist=<optimized out>,
 pkt=<optimized out>,
     got_output=<optimized out>, duration_pts=<optimized out>,
 eof=<optimized out>,
     decode_failed=<optimized out>) at fftools/ffmpeg.c:2459
 #16 process_input_packet (ist=<optimized out>, pkt=<optimized out>,
 no_eof=<optimized out>)
     at fftools/ffmpeg.c:2613
 #17 0x00000000004b8887 in process_input (file_index=0) at
 fftools/ffmpeg.c:4269
 #18 0x000000000048d59b in transcode_step () at fftools/ffmpeg.c:4628
 #19 transcode () at fftools/ffmpeg.c:4682
 #20 0x0000000000487d54 in main (argc=17, argv=<optimized out>) at
 fftools/ffmpeg.c:4884

 }}}
 Please confirm.
 Thanks

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8279>
FFmpeg <https://ffmpeg.org>
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