ffmpeg | branch: release/4.4 | Michael Niedermayer <mich...@niedermayer.cc> | Sun Mar 20 23:32:53 2022 +0100| [e3a733ba8e95de6904226c7670f7a56736797771] | committer: Michael Niedermayer
avformat/aviobuf: Check buf_size in ffio_ensure_seekback() buffer_size is an int Fixes: signed integer overflow: 9223372036854775754 + 32767 cannot be represented in type 'long' Fixes: 45691/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5263458831040512 Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit c4b130e876fe9ac5875a2f2480e96de4fdac7760) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e3a733ba8e95de6904226c7670f7a56736797771 --- libavformat/aviobuf.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c index 518cb11129..1fb30644ff 100644 --- a/libavformat/aviobuf.c +++ b/libavformat/aviobuf.c @@ -1005,6 +1005,9 @@ int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size) if (buf_size <= s->buf_end - s->buf_ptr) return 0; + if (buf_size > INT_MAX - max_buffer_size) + return AVERROR(EINVAL); + buf_size += max_buffer_size - 1; if (buf_size + s->buf_ptr - s->buffer <= s->buffer_size || s->seekable || !s->read_packet) _______________________________________________ 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".
