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swscale/utils: clear formatConvBuffer on allocation 

Fixes use of uninitialized memory
Fixes: asan_heap-oob_35ca682_1474_cov_3230122439_aletrek_tga_16bit.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 007498fc1a)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-02-27 03:12:23 +01:00
parent dfc3cd73ff
commit 0b0a8cd133
1 changed files with 1 additions and 1 deletions
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2
libswscale/utils.c
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@ -1314,7 +1314,7 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
c->chrDstW = FF_CEIL_RSHIFT(dstW, c->chrDstHSubSample);
c->chrDstH = FF_CEIL_RSHIFT(dstH, c->chrDstVSubSample);
FF_ALLOC_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
FF_ALLOCZ_OR_GOTO(c, c->formatConvBuffer, FFALIGN(srcW*2+78, 16) * 2, fail);
/* unscaled special cases */
if (unscaled && !usesHFilter && !usesVFilter &&