[FFmpeg-trac] #2598(avformat:open): ffmpeg hangs when given any invalid option

[FFmpeg]

#2598: ffmpeg hangs when given any invalid option
-------------------------------------+-------------------------------------
             Reporter:  191919       |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  avformat
              Version:  git-master   |               Resolution:
             Keywords:  md5          |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:   => md5 regression
 * status:  new => open
 * component:  FFmpeg => avformat
 * reproduced:  0 => 1


Comment:

 Some information:
 The following configure line allows to reproduce the problem
 {{{
 $ ./configure --disable-everything --enable-muxer=framemd5,md5 --disable-
 asm --disable-yasm --disable-optimizations --extra-cflags=-O2 && make
 ffmpeg
 }}}
 The problem disappears if libavformat/md5enc.o is compiled with {{{-O1}}}

 Reimar suggested to rename the .class_name of the framemd5_class (which
 works), he has sent a patch.

 Different backtraces possible:
 {{{
 0x000000010011eb30 in av_oformat_next ()
 (gdb) bt
 #0  0x000000010011eb30 in av_oformat_next ()
 #1  0x00000001000e250e in format_child_class_next (prev=0x100840e40) at
 options.c:64
 }}}
 {{{
 0x00000001000e24e4 in format_child_class_next (prev=0x100843eb0) at
 options.c:60
 60              if (ifmt->priv_class == prev)
 (gdb) bt
 #0  0x00000001000e24e4 in format_child_class_next (prev=0x100843eb0) at
 options.c:60
 #1  0x000000010061f907 in av_opt_find2 (obj=0x7fff5fbff6a0,
 name=0x7fff5fbffc75 "a", unit=0x0, opt_flags=0, search_flags=1606416032,
 target_obj=0x7fff5fbff6a0) at opt.c:1298
 }}}
 {{{
 0x000000010011eb20 in av_iformat_next ()
 (gdb) bt
 #0  0x000000010011eb20 in av_iformat_next ()
 #1  0x00000001000e24f2 in format_child_class_next (prev=0x10083b420) at
 options.c:59
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2598#comment:9>
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