[FFmpeg-devel] [PATCH] mpeg4videodec: silence ubsan warning
andreas.cadhalpun at googlemail.com
Sat Jan 16 00:15:17 CET 2016
On 15.01.2016 03:17, Michael Niedermayer wrote:
> On Fri, Jan 15, 2016 at 12:30:28AM +0100, Andreas Cadhalpun wrote:
>> s->ac_val is of type 'int16_t ', but points into a larger buffer.
>> Here it is used as base pointer to find the correct position in the
>> larger buffer by adding 's->block_index[n] * 16' and thus as 'int16_t *'.
>> This fixes clang's ubsan runtime error: index out of bounds for type
>> 'int16_t '
>> Fixes: test_case.mp4
>> Found-by: Tyson Smith <twsmith at mozilla.com>
>> Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
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