diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-04 01:06:46 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | 452faa80b431afb9ecfba9ef8e85856221d2a5ca (patch) | |
| tree | 00e65586714671a4dceae1d8d6294aa59ecda398 | |
| parent | d5c4d054822601e6bb57b12bfe69686d042dc792 (diff) | |
| download | ffmpeg-452faa80b431afb9ecfba9ef8e85856221d2a5ca.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 c07238ec67..9320862b9b 100644 --- a/libavformat/icodec.c +++ b/libavformat/icodec.c @@ -58,6 +58,9 @@ 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); @@ -67,7 +70,7 @@ static int read_header(AVFormatContext *s) int tmp; if (avio_seek(pb, 6 + i * 16, SEEK_SET) < 0) - break; + return AVERROR_INVALIDDATA; st = avformat_new_stream(s, NULL); if (!st) @@ -90,7 +93,7 @@ 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; + return AVERROR_INVALIDDATA; codec = avio_rl32(pb); switch (codec) { |