diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-03-20 23:32:53 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-25 13:51:39 +0200 |
| commit | e3a733ba8e95de6904226c7670f7a56736797771 (patch) | |
| tree | 857bbb8814ebfaf24a169e40c76b4e872788fad9 | |
| parent | 2ccfbc888ccceb7d407aa5da86b0453bdaf4c166 (diff) | |
| download | ffmpeg-e3a733ba8e95de6904226c7670f7a56736797771.tar.gz | |
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 <michael@niedermayer.cc>
(cherry picked from commit c4b130e876fe9ac5875a2f2480e96de4fdac7760)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/aviobuf.c | 3 |
1 files changed, 3 insertions, 0 deletions
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) |