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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-03 18:54:08 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-06 13:56:53 +0200 |
| commit | 5e73b973c53e6e2fcd799cbee0d6d272efbbfbc7 (patch) | |
| tree | 41190a4bdc2cbcc4dfa3aec1c9009baed9aa9e1a | |
| parent | e4e6a3fbcc4fd4c4aaebcfd4478222ff84f63d71 (diff) | |
| download | ffmpeg-5e73b973c53e6e2fcd799cbee0d6d272efbbfbc7.tar.gz | |
avcodec/xpmdec: Move allocations down after more error checks
Fixes: Timeout
Fixes: 37035/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XPM_fuzzer-5142718576721920
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e58692837c20c8484a23cd9beb63ac422f82458a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/xpmdec.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/libavcodec/xpmdec.c b/libavcodec/xpmdec.c index 922dfc0f67..993873c595 100644 --- a/libavcodec/xpmdec.c +++ b/libavcodec/xpmdec.c @@ -341,9 +341,6 @@ static int xpm_decode_frame(AVCodecContext *avctx, void *data, if ((ret = ff_set_dimensions(avctx, width, height)) < 0) return ret; - if ((ret = ff_get_buffer(avctx, p, 0)) < 0) - return ret; - if (cpp <= 0 || cpp >= 5) { av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of chars per pixel: %d\n", cpp); return AVERROR_INVALIDDATA; @@ -360,14 +357,17 @@ static int xpm_decode_frame(AVCodecContext *avctx, void *data, size *= 4; - av_fast_padded_malloc(&x->pixels, &x->pixels_size, size); - if (!x->pixels) - return AVERROR(ENOMEM); - ptr += mod_strcspn(ptr, ",") + 1; if (end - ptr < 1) return AVERROR_INVALIDDATA; + if ((ret = ff_get_buffer(avctx, p, 0)) < 0) + return ret; + + av_fast_padded_malloc(&x->pixels, &x->pixels_size, size); + if (!x->pixels) + return AVERROR(ENOMEM); + for (i = 0; i < ncolors; i++) { const uint8_t *index; int len; |