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avutil/timecode: Fix fps check 

The fps variable is explicitly set to -1 in case of some errors, the check must
thus be signed or the code setting it needs to use 0 as error code
the type of the field could be changed as well but its in an installed header

Fixes: integer overflow
Fixes: 9982cc157b1ea90429435640a989122f/asan_generic_3ad004a_3799_22cf198d9cd09928e2d9ad250474fa58.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b46dcd5209)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-03 03:14:11 +01:00
parent 86a52988bd
commit da87a699ea
1 changed files with 1 additions and 1 deletions
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2
libavutil/timecode.c
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@ -151,7 +151,7 @@ static int check_fps(int fps)
static int check_timecode(void *log_ctx, AVTimecode *tc)
{
if (tc->fps <= 0) {
if ((int)tc->fps <= 0) {
av_log(log_ctx, AV_LOG_ERROR, "Timecode frame rate must be specified\n");
return AVERROR(EINVAL);
}