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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-12 20:13:34 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-25 13:30:09 +0200 |
| commit | 5ea7f2050050fd6a9177a9b618f2bb2d4add9230 (patch) | |
| tree | 2ecc70e327aed036b18ba85c3179ef125829e8db /libavcodec/xpmdec.c | |
| parent | d8716e3df9ee81909342b0b59f5b6eff052964fd (diff) | |
| download | ffmpeg-5ea7f2050050fd6a9177a9b618f2bb2d4add9230.tar.gz | |
avcodec/xpmdec: Do not use context dimensions as temporary variables
Fixes: Integer overflow
Fixes: 15134/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XPM_fuzzer-5722635939348480
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/xpmdec.c')
| -rw-r--r-- | libavcodec/xpmdec.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libavcodec/xpmdec.c b/libavcodec/xpmdec.c index 43dd9bc7e7..922dfc0f67 100644 --- a/libavcodec/xpmdec.c +++ b/libavcodec/xpmdec.c @@ -311,6 +311,7 @@ static int xpm_decode_frame(AVCodecContext *avctx, void *data, int ncolors, cpp, ret, i, j; int64_t size; uint32_t *dst; + int width, height; avctx->pix_fmt = AV_PIX_FMT_BGRA; @@ -332,12 +333,12 @@ static int xpm_decode_frame(AVCodecContext *avctx, void *data, ptr += mod_strcspn(ptr, "\""); if (sscanf(ptr, "\"%u %u %u %u\",", - &avctx->width, &avctx->height, &ncolors, &cpp) != 4) { + &width, &height, &ncolors, &cpp) != 4) { av_log(avctx, AV_LOG_ERROR, "missing image parameters\n"); return AVERROR_INVALIDDATA; } - if ((ret = ff_set_dimensions(avctx, avctx->width, avctx->height)) < 0) + if ((ret = ff_set_dimensions(avctx, width, height)) < 0) return ret; if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |