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avcodec/dts2pts_bsf: Avoid poc overflows in cmp_find() 

Fixes: signed integer overflow: -2147483648 - 5 cannot be represented in type 'int'
Fixes: 54242/clusterfuzz-testcase-minimized-ffmpeg_BSF_DTS2PTS_fuzzer-472928339243827

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-12-25 16:37:57 +01:00
parent 64a04fc165
commit aee0f320ac
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GPG Key ID: B18E8928B3948D64
1 changed files with 4 additions and 2 deletions
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6
libavcodec/dts2pts_bsf.c
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@ -90,9 +90,11 @@ static int cmp_insert(const void *key, const void *node)
static int cmp_find(const void *key, const void *node)
{
int ret = ((const DTS2PTSFrame *)key)->poc - ((const DTS2PTSNode *) node)->poc;
const DTS2PTSFrame * key1 = key;
const DTS2PTSNode *node1 = node;
int ret = FFDIFFSIGN(key1->poc, node1->poc);
if (!ret)
ret = ((const DTS2PTSFrame *)key)->gop - ((const DTS2PTSNode *) node)->gop;
ret = key1->gop - node1->gop;
return ret;
}