On Sat, Jun 27, 2020 at 5:04 AM Michael Niedermayer <mich...@niedermayer.cc> wrote: > > On Mon, Jun 22, 2020 at 12:12:08AM +0530, gautamr...@gmail.com wrote: > > From: Gautam Ramakrishnan <gautamr...@gmail.com> > > > > The log2_chroma_wh is derived from the sample separations of the > > codestream if the file is a j2k codestream. Not sure if sample > > separation is same is subsampling and whether using sample > > separation values from the codestream to determine pixel format. > > --- > > libavcodec/jpeg2000dec.c | 2 -- > > 1 file changed, 2 deletions(-) > > > > diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c > > index c8c89803ac..2b9659bf96 100644 > > --- a/libavcodec/jpeg2000dec.c > > +++ b/libavcodec/jpeg2000dec.c > > @@ -225,8 +225,6 @@ static int pix_fmt_match(enum AVPixelFormat pix_fmt, > > int components, > > > > case 1: > > match = match && desc->comp[0].depth >= bpc && > > - (log2_chroma_wh >> 2 & 3) == 0 && > > - (log2_chroma_wh & 3) == 0 && > > (desc->flags & AV_PIX_FMT_FLAG_PAL) == pal8 * > > AV_PIX_FMT_FLAG_PAL; > > } > > return match; > > Heres a better bug report > > ffmpeg_g -i afl-testcase/p0_10.j2k -f null - > (the testcase should be the normal reference file before fuzzing, this crashed > before any fuzzing) > > [...] > [jpeg2000 @ 0x555559d70880] bpno became invalid > Last message repeated 4 times > Program received signal SIGSEGV, Segmentation fault. > ff_jpeg2000_cleanup (comp=0x555559d76d40, codsty=0x555559d7f98c) at > libavcodec/jpeg2000.c:604 > 604 int nb_code_blocks = prec->nb_codeblocks_height * > prec->nb_codeblocks_width; > (gdb) bt > #0 0x0000555557043463 in ff_jpeg2000_cleanup (comp=0x555559d76d40, > codsty=0x555559d7f98c) at libavcodec/jpeg2000.c:604 > #1 0x0000555557045bc5 in jpeg2000_dec_cleanup (s=s@entry=0x555559d71fc0) at > libavcodec/jpeg2000dec.c:2029 > #2 0x000055555706263c in jpeg2000_decode_frame (avctx=0x555559d70880, > data=0x555559d71880, got_frame=0x7fffffffd5e0, avpkt=<optimized out>) at > libavcodec/jpeg2000dec.c:2416 > #3 0x0000555556aad261 in decode_simple_internal (frame=<optimized out>, > avctx=<optimized out>) at libavcodec/decode.c:342 > #4 0x0000555556aad261 in decode_simple_receive_frame (frame=<optimized out>, > avctx=<optimized out>) at libavcodec/decode.c:538 > #5 0x0000555556aad261 in decode_receive_frame_internal > (avctx=avctx@entry=0x555559d70880, frame=0x555559d71880) at > libavcodec/decode.c:556 > #6 0x0000555556aafa28 in avcodec_send_packet > (avctx=avctx@entry=0x555559d70880, avpkt=avpkt@entry=0x7fffffffd6b0) at > libavcodec/decode.c:614 > #7 0x00005555567c9f23 in try_decode_frame (s=s@entry=0x555559d6e940, > st=st@entry=0x555559d6fe00, avpkt=avpkt@entry=0x555559d76940, > options=<optimized out>) at libavformat/utils.c:3111 > #8 0x00005555567fad2a in avformat_find_stream_info (ic=0x555559d6e940, > options=0x555559d70740) at libavformat/utils.c:3954 > #9 0x00005555558c6eb9 in open_input_file (o=o@entry=0x7fffffffdcb0, > filename=<optimized out>) at fftools/ffmpeg_opt.c:1185 > #10 0x00005555558d1ea9 in open_files (l=0x555559d6e718, l=0x555559d6e718, > open_file=0x5555558c2410 <open_input_file>, inout=0x555558c178b9 "input") at > fftools/ffmpeg_opt.c:3302 > #11 0x00005555558d1ea9 in ffmpeg_parse_options (argc=<optimized out>, > argv=<optimized out>) at fftools/ffmpeg_opt.c:3342 > #12 0x00005555558abcb9 in main (argc=6, argv=0x7fffffffe258) at > fftools/ffmpeg.c:4848
Thanks Michael, I'll look for errors in the code. -- ------------- Gautam | _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
