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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-15 23:26:05 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-05 19:34:33 +0200 |
| commit | 6443b95de666cae87ae87b53d56538c9c02d30c5 (patch) | |
| tree | 7c238f2adf5e7ddcc82ef2863bc327a931b37783 /libavcodec | |
| parent | 772d91d6b0c6cfb313548c46c9a8b3ccc7272caf (diff) | |
| download | ffmpeg-6443b95de666cae87ae87b53d56538c9c02d30c5.tar.gz | |
avcodec/sanm: Check extradata_size before allocations
Fixes: Leaks
Fixes: 15349/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SANM_fuzzer-5102530557640704
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 172a43ce36e671fdab63afe1c06876bba91445b3)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/sanm.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c index 25aee7220f..d0000ebd0c 100644 --- a/libavcodec/sanm.c +++ b/libavcodec/sanm.c @@ -491,6 +491,11 @@ static av_cold int decode_init(AVCodecContext *avctx) ctx->avctx = avctx; ctx->version = !avctx->extradata_size; + // early sanity check before allocations to avoid need for deallocation code. + if (!ctx->version && avctx->extradata_size < 1026) { + av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n"); + return AVERROR_INVALIDDATA; + } avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8; @@ -506,11 +511,6 @@ static av_cold int decode_init(AVCodecContext *avctx) if (!ctx->version) { int i; - if (avctx->extradata_size < 1026) { - av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n"); - return AVERROR_INVALIDDATA; - } - ctx->subversion = AV_RL16(avctx->extradata); for (i = 0; i < PALETTE_SIZE; i++) ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4); |