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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-06 09:21:52 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:42 +0100 |
| commit | a6d1e2c40a47258991b20fbb82d675a3513f22ba (patch) | |
| tree | 8d7feeac66041740c5762f362b1d03f3b0ad2074 | |
| parent | 5c2cbf36ddcaf09a6b0e1a73950f0a6905837bba (diff) | |
| download | ffmpeg-a6d1e2c40a47258991b20fbb82d675a3513f22ba.tar.gz | |
avcodec/parser: Check next index validity in ff_combine_frame()
Fixes: out of array access
Fixes: 15522/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DNXHD_fuzzer-5747756078989312
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 15008db0fac6d97bb939fa7ef9e92d79bf1f7cb1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/parser.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/parser.c b/libavcodec/parser.c index 0a994a3f30..3e19810a94 100644 --- a/libavcodec/parser.c +++ b/libavcodec/parser.c @@ -245,6 +245,9 @@ int ff_combine_frame(ParseContext *pc, int next, for (; pc->overread > 0; pc->overread--) pc->buffer[pc->index++] = pc->buffer[pc->overread_index++]; + if (next > *buf_size) + return AVERROR(EINVAL); + /* flush remaining if EOF */ if (!*buf_size && next == END_NOT_FOUND) next = 0; |