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avcodec/microdvddec: Check for string end in 'P' case 

Fixes out of array read
Fixes: a9502b60f4cecc19475382aee255f73c/asan_heap-oob_1e87fba_2548_a8ad47f6dde36644fe9cdc444d4632d0.sub

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit c719cd6cf7)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-11-06 22:24:23 +01:00
parent 7ce70e6914
commit c15f5068ca
1 changed files with 2 additions and 0 deletions
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2
libavcodec/microdvddec.c
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@ -148,6 +148,8 @@ static char *microdvd_load_tags(struct microdvd_tag *tags, char *s)
/* Position */
case 'P':
if (!*s)
break;
tag.persistent = MICRODVD_PERSISTENT_ON;
tag.data1 = (*s++ == '1');
if (*s != '}')