Hi On Tue, Jan 23, 2007 at 05:58:27PM +0100, Benoit Fouet wrote: > Hi, > > Michael Niedermayer wrote: > > does it also crash under gdb? > yes, it does > > > if so maybe a backtrace from gdb would be > > more informative ... > > > what about this backtrace ? > > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread -1214749008 (LWP 24106)] > 0x08235895 in decode_residual (h=0xb788f020, gb=0xb7891100, > block=0xb78c8da8, n=0, > scantable=0xb78c9635 > "\001\004\b\005\002\003\006\t\f\r\n\a\v\016\017", qmul=0xb78aac24, > max_coeff=15) at bitstream.h:888 > 888 GET_VLC(code, re, s, table, bits, max_depth) > (gdb) bt > #0 0x08235895 in decode_residual (h=0xb788f020, gb=0xb7891100, > block=0xb78c8da8, n=0, > scantable=0xb78c9635 > "\001\004\b\005\002\003\006\t\f\r\n\a\v\016\017", qmul=0xb78aac24, > max_coeff=15) at bitstream.h:888 > #1 0x0824a82d in decode_mb_cavlc (h=0xb788f020) at h264.c:5487 > #2 0x0825cecc in decode_slice (h=0xb788f020) at h264.c:7435 > #3 0x0825e112 in decode_nal_units (h=0xb788f020, buf=0x85d1b70 "", > buf_size=4509) at h264.c:8146 > #4 0x0825fb93 in decode_frame (avctx=0x84760c0, data=0xbfa2dbc0, > data_size=0xbfa2d830, buf=0x85d1b70 "", buf_size=4509) at h264.c:8316 > #5 0x080c529e in avcodec_decode_video (avctx=0x84760c0, picture=0x0, > got_picture_ptr=0xbfa2d830, buf=0x0, buf_size=140319600) > at utils.c:904 > #6 0x0805b6a9 in output_packet (ist=0x84770d0, ist_index=0, > ost_table=0x8477120, nb_ostreams=1, pkt=0xbfa2de80) at ffmpeg.c:1092 > #7 0x080635f6 in main (argc=-1079845248, argv=0x0) at ffmpeg.c:1936 > > Ben > > PS: gdb is still running, if you need anything else :) the linenumber in decode_residual() :))) which is definitly not in bitstream.h but h264.c i do know its crashing in get_vlc*() which is called by decode_residual() but i dont know in which, there are several one of the vlc tables either is damaged, or more likely a index into one is out of range maybe a "#define always_inline" before #include "bitstream.h" with -O0 would help or the good old add a printf() before each get_vlc*() in decode_residual() PS: fuzzer crash/bugreports about other decoders and demuxers are also very welcome [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB No evil is honorable: but death is honorable; therefore death is not evil. -- Citium Zeno -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: not available URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20070123/5278f897/attachment.pgp>
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