ffmpeg | branch: release/4.4 | Michael Niedermayer <mich...@niedermayer.cc> | Thu Feb 3 22:46:55 2022 +0100| [d3456a374d4eff67d3bebc0fcb52c6843a05a816] | committer: Michael Niedermayer
avformat/matroskadec: Fix infinite loop with bz decompression The same check is added to zlib too, it seems not needed there though Fixes: Infinite loop Fixes: 43932/clusterfuzz-testcase-minimized-ffmpeg_dem_MATROSKA_fuzzer-6175167573786624 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 9c3d2cbb510674226b0c8fa6b146bf891f83786c) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d3456a374d4eff67d3bebc0fcb52c6843a05a816 --- libavformat/matroskadec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index 50e572d5c5..5cd6699a23 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -1690,7 +1690,7 @@ static int matroska_decode_buffer(uint8_t **buf, int *buf_size, case MATROSKA_TRACK_ENCODING_COMP_ZLIB: { z_stream zstream = { 0 }; - if (inflateInit(&zstream) != Z_OK) + if (!pkt_size || inflateInit(&zstream) != Z_OK) return -1; zstream.next_in = data; zstream.avail_in = isize; @@ -1723,7 +1723,7 @@ static int matroska_decode_buffer(uint8_t **buf, int *buf_size, case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { bz_stream bzstream = { 0 }; - if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) + if (!pkt_size || BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) return -1; bzstream.next_in = data; bzstream.avail_in = isize; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
