avformat/wtvdec: Check pointer before use

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>
9 years ago · cc5e5548df
parent 67318187fb
commit cc5e5548df
1 changed files with 1 additions and 1 deletions
--- a/libavformat/wtvdec.c
+++ b/libavformat/wtvdec.c
@ -1031,7 +1031,7 @@ 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++;
                        }