On Wed, May 21, 2025 at 02:46:42AM +0200, Michael Niedermayer wrote: > On Mon, May 19, 2025 at 08:15:37PM +0800, chenyu202...@gmail.com wrote: > > From: chenyu <chenyu202...@gmail.com> > > > > Optimizing 160k code size by converting static array to dynamic malloc > > memory. > > > > Signed-off-by: chenyu <chenyu202...@gmail.com> > > --- > > libavcodec/mpegaudiodata.h | 4 ++-- > > libavcodec/mpegaudiodec_common_tablegen.h | 10 ++++++++-- > > 2 files changed, 10 insertions(+), 4 deletions(-) > > This segfaults: > > ./ffmpeg_g -max_error_rate 2 -max_alloc 100000 -i > ~/tickets/2950/mpeg2_fuzz.mpg -max_muxing_queue_size 8000 -f null -
==3638361== Invalid write of size 4 ==3638361== at 0x2DFB01: mpegaudiodec_common_init_static (in ffmpeg/ffmpeg_g) ==3638361== by 0x4A114DE: __pthread_once_slow (pthread_once.c:116) ==3638361== by 0x2DFBB1: ff_mpegaudiodec_common_init_static (in ffmpeg/ffmpeg_g) ==3638361== by 0x4A114DE: __pthread_once_slow (pthread_once.c:116) ==3638361== by 0x2A6FFD: decode_init (in ffmpeg/ffmpeg_g) ==3638361== by 0x7E4BF1: avcodec_open2 (in ffmpeg/ffmpeg_g) ==3638361== by 0x62C444: try_decode_frame (in ffmpeg/ffmpeg_g) ==3638361== by 0x631575: avformat_find_stream_info (in ffmpeg/ffmpeg_g) ==3638361== by 0x306596: ifile_open (in ffmpeg/ffmpeg_g) ==3638361== by 0x31CA17: open_files.isra.0 (in ffmpeg/ffmpeg_g) ==3638361== by 0x31E9F5: ffmpeg_parse_options (in ffmpeg/ffmpeg_g) ==3638361== by 0x2FD297: main (in ffmpeg/ffmpeg_g) ==3638361== Address 0x4 is not stack'd, malloc'd or (recently) free'd [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB For a strong democracy, genuine criticism is necessary, allegations benefit noone, they just cause unnecessary conflicts. - Narendra Modi
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