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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-04 01:06:46 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-10 16:04:26 +0200 |
| commit | 89db9bbfc398464adbfd965a6092a7a247849ff3 (patch) | |
| tree | e54750663d3fa28fadb69467871f679a47a508f2 | |
| parent | 636fe4145194c47d3daee5f5234098757fc684b3 (diff) | |
| download | ffmpeg-89db9bbfc398464adbfd965a6092a7a247849ff3.tar.gz | |
avformat/icodec: Check for zero streams and stream creation failure
Fixes: NULL pointer dereference
Fixes: 26814/clusterfuzz-testcase-minimized-ffmpeg_dem_ICO_fuzzer-5758487797432320
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b33233bd53f74f94f4cd7be0645a99a9549a913e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/icodec.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libavformat/icodec.c b/libavformat/icodec.c index 05ca08a77e..d2affbf35f 100644 --- a/libavformat/icodec.c +++ b/libavformat/icodec.c @@ -84,6 +84,9 @@ static int read_header(AVFormatContext *s) avio_skip(pb, 4); ico->nb_images = avio_rl16(pb); + if (!ico->nb_images) + return AVERROR_INVALIDDATA; + ico->images = av_malloc_array(ico->nb_images, sizeof(IcoImage)); if (!ico->images) return AVERROR(ENOMEM); @@ -93,7 +96,7 @@ static int read_header(AVFormatContext *s) int tmp; if (avio_seek(pb, 6 + i * 16, SEEK_SET) < 0) - break; + goto fail; st = avformat_new_stream(s, NULL); if (!st) { @@ -118,7 +121,7 @@ static int read_header(AVFormatContext *s) ico->images[i].offset = avio_rl32(pb); if (avio_seek(pb, ico->images[i].offset, SEEK_SET) < 0) - break; + goto fail; codec = avio_rl32(pb); switch (codec) { |