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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-03-20 23:32:53 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-06-09 20:46:21 +0200 |
| commit | c4b130e876fe9ac5875a2f2480e96de4fdac7760 (patch) | |
| tree | 055b688d6b77b1ca9dfdc2bbcd0a99f56c42a871 | |
| parent | 35dc93ab44a57d78956414624c4e011414220e98 (diff) | |
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>
| -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 29d4bd7510..33bc3c2e20 100644 --- a/libavformat/aviobuf.c +++ b/libavformat/aviobuf.c @@ -1062,6 +1062,9 @@ 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) |