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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-21 13:25:59 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-22 22:50:33 +0200 |
| commit | 450b51b409bd1327e9d60b0396e56cad31835890 (patch) | |
| tree | 285a8ed92a3f1e5ad3d8862443a82661bf8f1518 | |
| parent | 8d1e76d130fb2a2e289cf8831e9a62557fabf532 (diff) | |
| download | ffmpeg-450b51b409bd1327e9d60b0396e56cad31835890.tar.gz | |
avcodec/flac_parser: Consider AV_INPUT_BUFFER_PADDING_SIZE
Fixes: out if array read
Fixes: 40109/clusterfuzz-testcase-minimized-ffmpeg_dem_FLAC_fuzzer-4805686811295744
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Mattias Wadman <mattias.wadman@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/flac_parser.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavcodec/flac_parser.c b/libavcodec/flac_parser.c index ffa6a28457..b9d65e8a6f 100644 --- a/libavcodec/flac_parser.c +++ b/libavcodec/flac_parser.c @@ -55,6 +55,7 @@ /** largest possible size of flac header */ #define MAX_FRAME_HEADER_SIZE 16 +#define MAX_FRAME_VERIFY_SIZE (MAX_FRAME_HEADER_SIZE) typedef struct FLACHeaderMarker { int offset; /**< byte offset from start of FLACParseContext->buffer */ @@ -169,7 +170,7 @@ static int find_headers_search_validate(FLACParseContext *fpc, int offset) uint8_t *header_buf; int size = 0; header_buf = flac_fifo_read_wrap(fpc, offset, - MAX_FRAME_HEADER_SIZE, + MAX_FRAME_VERIFY_SIZE + AV_INPUT_BUFFER_PADDING_SIZE, &fpc->wrap_buf, &fpc->wrap_buf_allocated_size); if (frame_header_is_valid(fpc->avctx, header_buf, &fi)) { |