[FFmpeg-cvslog] avcodec/lagarith: fix integer overflow

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue Nov 11 03:19:11 2014 +0100| [35dcc8a0405788de392ed116dd628aef2772003d] | committer: Michael Niedermayer

avcodec/lagarith: fix integer overflow

Fixes: asan_heap-oob_1bf48fa_2513_lag-yuy2.avi
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=35dcc8a0405788de392ed116dd628aef2772003d
---

 libavcodec/lagarith.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c
index 5f97d0f..2c6d70c 100644
--- a/libavcodec/lagarith.c
+++ b/libavcodec/lagarith.c
@@ -128,7 +128,7 @@ static int lag_decode_prob(GetBitContext *gb, uint32_t *value)
     }
 
     val  = get_bits_long(gb, bits);
-    val |= 1 << bits;
+    val |= 1U << bits;
 
     *value = val - 1;