[libav-bugs] [Bug 84] Illegal reads in vc-1 decoder

bugzilla-daemon at aruru.libav.org bugzilla-daemon at aruru.libav.org
Tue Nov 29 20:24:43 CET 2011


Aneesh Dogra <lionaneesh at gmail.com> changed:

           What    |Removed                     |Added
                 CC|                            |lionaneesh at gmail.com

--- Comment #4 from Aneesh Dogra <lionaneesh at gmail.com> 2011-11-29 20:24:42 CET ---
Back Trace :-

#0  get_vlc2 (v=0x42c6840, last=0xbee803cc, skip=0xbee803c8, value=0xbee803c4, 
    codingset=0) at libavcodec/get_bits.h:512
#1  vc1_decode_ac_coeff (v=0x42c6840, last=0xbee803cc, skip=0xbee803c8, 
    value=0xbee803c4, codingset=0) at libavcodec/vc1dec.c:2613
#2  0x084b82c4 in vc1_decode_i_block (v=0x42c6840) at libavcodec/vc1dec.c:2752
#3  vc1_decode_i_blocks (v=0x42c6840) at libavcodec/vc1dec.c:4510
#4  0x084c4fe4 in vc1_decode_blocks (v=0x42c6840) at libavcodec/vc1dec.c:4890
#5  0x084cb3ea in vc1_decode_frame (avctx=0x4237f20, data=0x439a680, 
    data_size=0xbee8090c, avpkt=0xbee80818) at libavcodec/vc1dec.c:5700
#6  0x084ab36e in avcodec_decode_video2 (avctx=0x4237f20, picture=0x439a680, 
    got_picture_ptr=0xbee8090c, avpkt=0xbee80818) at libavcodec/utils.c:744
#7  0x0807c987 in transcode_video (ist=0x425fca0, ost_table=0x4268d68, 
    nb_ostreams=2, pkt=0xbee80b58) at avconv.c:1736
#8  output_packet (ist=0x425fca0, ost_table=0x4268d68, nb_ostreams=2, 
    pkt=0xbee80b58) at avconv.c:1884
#9  0x080851ce in transcode (argc=6, argv=0xbee80c64) at avconv.c:2519
#10 main (argc=6, argv=0xbee80c64) at avconv.c:4296

It looks like there is probably something wrong with ff_vc1_ac_coeff_table ,
file vc1dec.c , line 2611

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