[libav-bugs] [Bug 1161] tow segment fault in libavcodec

bugzilla at libav.org bugzilla at libav.org
Fri Jun 28 11:00:13 CEST 2019


https://bugzilla.libav.org/show_bug.cgi?id=1161

yanxdd <yanshb at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|---                         |High
                 CC|                            |yanshb at gmail.com

--- Comment #1 from yanxdd <yanshb at gmail.com> ---
Description: Floating point exception signal

Triggered by ./avconv -i poc3-FloatingPointException -f /dev/null

avconv version v13_dev0-1648-gc464278, Copyright (c) 2000-2018 the Libav
developers built on Jun 27 2019 00:12:43 with clang version 9.0.0 (trunk
363905)

GDB debugging information is as follows:


Ignoring attempt to set invalid timebase for st:0

[ape @ 0x16d38c0] packet size is not a multiple of 4. extra bytes at the end
will be skipped.


Program received signal SIGFPE, Arithmetic exception.

range_decode_culshift (shift=<optimized out>, ctx=<optimized out>) at
libavcodec/apedec.c:384

384 return ctx->rc.low / ctx->rc.help;

(gdb) bt
#0 range_decode_culshift (shift=<optimized out>, ctx=<optimized out>) at
libavcodec/apedec.c:384
#1 range_decode_bits (n=<optimized out>, ctx=<optimized out>) at
libavcodec/apedec.c:403
#2 ape_decode_value_3900 (rice=0x16d58e0, ctx=0x16d4f00) at
libavcodec/apedec.c:546
#3 entropy_decode_stereo_3900 (ctx=0x16d4f00, blockstodecode=<optimized out>)
at libavcodec/apedec.c:704
#4 0x0000000000585ebf in ape_unpack_stereo (count=73728, ctx=0x16d4f00) at
libavcodec/apedec.c:1411
#5 ape_decode_frame (avctx=0x16d38c0, data=0x16d4b20, got_frame_ptr=<optimized
out>, avpkt=0x16d4e20) at libavcodec/apedec.c:1538
#6 0x00000000005c274b in decode_simple_internal (frame=0x16d4b20,
avctx=0x16d38c0) at libavcodec/decode.c:336
#7 decode_simple_receive_frame (frame=<optimized out>, avctx=<optimized out>)
at libavcodec/decode.c:387
#8 decode_receive_frame_internal (avctx=avctx at entry=0x16d38c0, frame=0x16d4b20)
at libavcodec/decode.c:405
#9 0x00000000005c2b18 in avcodec_send_packet (avctx=avctx at entry=0x16d38c0,
avpkt=avpkt at entry=0x7fffffffd1f0) at libavcodec/decode.c:466
#10 0x000000000054ff6d in try_decode_frame (st=st at entry=0x16d30c0,
avpkt=avpkt at entry=0x7fffffffd2e0, options=0x16d42a0, s=0x16c7060) at
libavformat/utils.c:1950
#11 0x00000000005542f1 in avformat_find_stream_info (ic=0x16c7060,
options=0x16d42a0) at libavformat/utils.c:2459
#12 0x0000000000452af6 in open_input_file (o=o at entry=0x7fffffffd740,
filename=<optimized out>) at avtools/avconv_opt.c:821
#13 0x0000000000454b7a in open_files (l=0x16c7898, l=0x16c7898,
open_file=0x452810 <open_input_file>, inout=0xbd8fbc "input") at
avtools/avconv_opt.c:2467
#14 avconv_parse_options (argc=argc at entry=5, argv=argv at entry=0x7fffffffe268) at
avtools/avconv_opt.c:2504
#15 0x000000000044cca4 in main (argc=5, argv=0x7fffffffe268) at
avtools/avconv.c:2953

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