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avformat/wtvdec: Check pointer before use

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Fixes out of array read
Fixes: 049fdf78565f1ce5665df236d90f8657/asan_heap-oob_10a5a97_1026_42f9d4855547329560f385768de2f3fb.wtv

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit cc5e5548df4af48674c7aef518e831b19e99f9fc)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-08-21 21:30:36 +02:00
parent fe7366ee93
commit 2858f77fd4
1 changed files with 1 additions and 1 deletions
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2
libavformat/wtvdec.c
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@ -1033,7 +1033,7 @@ static int read_header(AVFormatContext *s)
while (1) {
uint64_t frame_nb = avio_rl64(pb);
uint64_t position = avio_rl64(pb);
while (frame_nb > e->size && e <= e_end) {
while (e <= e_end && frame_nb > e->size) {
e->pos = last_position;
e++;
}