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avutil/common: Fix integer overflow in av_clip_int8/16_c

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Fixes: signal_sigsegv_30420a5_2388_cov_1489993561_integra_lavf.mp4

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-02-25 20:55:02 +01:00
parent 63ca0fe828
commit 6d66e1a113
1 changed files with 2 additions and 2 deletions
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4
libavutil/common.h
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@ -147,7 +147,7 @@ static av_always_inline av_const uint8_t av_clip_uint8_c(int a)
*/
static av_always_inline av_const int8_t av_clip_int8_c(int a)
{
if ((a+0x80) & ~0xFF) return (a>>31) ^ 0x7F;
if ((a+0x80U) & ~0xFF) return (a>>31) ^ 0x7F;
else return a;
}
@ -169,7 +169,7 @@ static av_always_inline av_const uint16_t av_clip_uint16_c(int a)
*/
static av_always_inline av_const int16_t av_clip_int16_c(int a)
{
if ((a+0x8000) & ~0xFFFF) return (a>>31) ^ 0x7FFF;
if ((a+0x8000U) & ~0xFFFF) return (a>>31) ^ 0x7FFF;
else return a;
}