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avformat/mov: Move +1 in check to avoid hypothetical overflow in add_ctts_entry()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit eb60b9d3aa)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-02-03 21:36:22 +01:00
parent 26fcff1eb4
commit 9b2ce61155
1 changed files with 1 additions and 1 deletions
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libavformat/mov.c
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@ -2979,7 +2979,7 @@ static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, uns
FFMAX(min_size_needed, 2 * (*allocated_size)) :
min_size_needed;
if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
if((unsigned)(*ctts_count) >= UINT_MAX / sizeof(MOVStts) - 1)
return -1;
ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);