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avcodec/vp8: Fix null pointer dereference in ff_vp8_decode_free() 

Fixes: signal_sigsegv_d5de23_967_vp80_00_comprehensive_010.ivf with memlimit 524288

Found-by: Samuel Groß, Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit a84f0e8d8f)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-07-18 19:02:26 +02:00
parent 7ae349a324
commit 8fe79605fd
1 changed files with 3 additions and 0 deletions
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3
libavcodec/vp8.c
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@ -2675,6 +2675,9 @@ av_cold int ff_vp8_decode_free(AVCodecContext *avctx)
VP8Context *s = avctx->priv_data;
int i;
if (!s)
return 0;
vp8_decode_flush_impl(avctx, 1);
for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++)
av_frame_free(&s->frames[i].tf.f);