[FFmpeg-trac] #6182(undetermined:new): scpr: crash with 16bpp

FFmpeg trac at avcodec.org
Thu Feb 23 16:57:29 EET 2017


#6182: scpr: crash with 16bpp
-------------------------------------+-------------------------------------
               Reporter:  ami_stuff  |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  normal     |              Component:
                Version:             |  undetermined
  unspecified                        |               Keywords:
             Blocked By:             |               Blocking:
Reproduced by developer:  0          |  Analyzed by developer:  0
-------------------------------------+-------------------------------------
 decodes correctly with original codec

 {{{
 (gdb) r -i '/media/sdb1/f/sp/sp_16bit_q100_o.avi'  -f null -
 Starting program: /media/sdb1/ffmpeg/ffmpeg_g -i
 '/media/sdb1/f/sp/sp_16bit_q100_o.avi'  -f null -
 [Thread debugging using libthread_db enabled]
 Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
 ffmpeg version 3.2.git Copyright (c) 2000-2017 the FFmpeg developers
   built with gcc 5.3.0 (Ubuntu 5.3.0-3ubuntu1~14.04) 20151204
   configuration: --disable-ffprobe --disable-ffserver --disable-ffplay
 --enable-gpl
   libavutil      55. 47.100 / 55. 47.100
   libavcodec     57. 81.100 / 57. 81.100
   libavformat    57. 66.102 / 57. 66.102
   libavdevice    57.  2.100 / 57.  2.100
   libavfilter     6. 73.100 /  6. 73.100
   libswscale      4.  3.101 /  4.  3.101
   libswresample   2.  4.100 /  2.  4.100
   libpostproc    54.  2.100 / 54.  2.100
 Input #0, avi, from '/media/sdb1/f/sp/sp_16bit_q100_o.avi':
   Metadata:
     encoder         : Lavf57.36.100
   Duration: 00:00:04.44, start: 0.000000, bitrate: 727 kb/s
     Stream #0:0: Video: scpr (SCPR / 0x52504353), rgb0, 318x198, 714 kb/s,
 25 fps, 25 tbr, 25 tbn, 25 tbc
 [New Thread 0xb68c6b40 (LWP 14539)]
 [New Thread 0xb60c5b40 (LWP 14540)]
 [New Thread 0xb58c4b40 (LWP 14541)]
 [New Thread 0xb50c3b40 (LWP 14542)]
 [New Thread 0xb48c2b40 (LWP 14543)]
 [New Thread 0xb40c1b40 (LWP 14544)]
 [New Thread 0xb38c0b40 (LWP 14545)]
 [New Thread 0xb30bfb40 (LWP 14546)]
 [New Thread 0xb28beb40 (LWP 14547)]
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf57.66.102
     Stream #0:0: Video: wrapped_avframe, rgb0, 318x198, q=2-31, 200 kb/s,
 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc57.81.100 wrapped_avframe
 Stream mapping:
   Stream #0:0 -> #0:0 (scpr (native) -> wrapped_avframe (native))
 Press [q] to stop, [?] for help

 Program received signal SIGSEGV, Segmentation fault.
 decode_unit (s=s at entry=0xb68c7020, pixel=pixel at entry=0xb76a08c8,
     rval=rval at entry=0xbfffe710, step=400) at libavcodec/scpr.c:224
 224         pixel->freq[c] = cnt_c + step;
 (gdb) bt
 #0  decode_unit (s=s at entry=0xb68c7020, pixel=pixel at entry=0xb76a08c8,
     rval=rval at entry=0xbfffe710, step=400) at libavcodec/scpr.c:224
 #1  0x086add77 in decompress_i (linesize=320, dst=0xb2042020,
 avctx=0x9a29ca0)
     at libavcodec/scpr.c:307
 #2  decode_frame (avctx=0x9a29ca0, data=0x9a2bf20, got_frame=0xbfffe81c,
     avpkt=0xbfffe78c) at libavcodec/scpr.c:686
 #3  0x08729a59 in avcodec_decode_video2 (avctx=0x9a29ca0,
 picture=0x9a2bf20,
     got_picture_ptr=0xbfffe81c, avpkt=0xbfffe918) at
 libavcodec/utils.c:2263
 #4  0x0872a9dd in do_decode (avctx=avctx at entry=0x9a29ca0,
     pkt=pkt at entry=0xbfffe918) at libavcodec/utils.c:2796
 #5  0x0872b7b0 in avcodec_send_packet (avctx=0x9a29ca0, avpkt=<optimized
 out>)
     at libavcodec/utils.c:2885
 #6  0x080e8447 in decode (pkt=0xbfffe918, got_frame=0xbfffeab4,
     frame=<optimized out>, avctx=0x9a29ca0) at ffmpeg.c:2052
 #7  decode_video (ist=ist at entry=0x9a29940, pkt=pkt at entry=0xbfffeaf4,
     got_output=got_output at entry=0xbfffeab4, eof=0) at ffmpeg.c:2248
 #8  0x080e9806 in process_input_packet (ist=0x9a29940, pkt=0xbfffed24,
     no_eof=0) at ffmpeg.c:2491
 #9  0x080c78d6 in process_input (file_index=<optimized out>) at
 ffmpeg.c:4251
 #10 transcode_step () at ffmpeg.c:4339
 #11 transcode () at ffmpeg.c:4393
 #12 main (argc=<optimized out>, argv=<optimized out>) at ffmpeg.c:4598
 (gdb)
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6182>
FFmpeg <https://ffmpeg.org>
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