diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-08-15 22:52:42 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-20 21:26:46 +0100 |
| commit | 03c479ce236955fc329c7f9f4765ee1ec256bb73 (patch) | |
| tree | 9e54395476c655402db6ae39fb047c89f830dfdd /libavformat | |
| parent | 24dc6d386c6f7edb8f6945319f53a7f0b1642bb8 (diff) | |
avformat/utils: check for integer overflow in av_get_frame_filename2()
Fixes: signed integer overflow: 317316873 * 10 cannot be represented in type 'int'
Fixes: 24708/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5731180885049344
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/utils.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c index d193f9e85f..8ac6bc04b8 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -4700,8 +4700,11 @@ int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number if (c == '%') { do { nd = 0; - while (av_isdigit(*p)) + while (av_isdigit(*p)) { + if (nd >= INT_MAX / 10 - 255) + goto fail; nd = nd * 10 + *p++ - '0'; + } c = *p++; } while (av_isdigit(c)); |