ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Sat 
Jul  8 22:51:57 2017 +0200| [fe9242204d33db070b8a9d907d93c9ead8a6f3ee] | 
committer: Michael Niedermayer

avcodec/ylc: Fix vlc of 31 bits

Fixes: runtime error: left shift of 1 by 31 places cannot be represented in 
type 'int'
Fixes: 2515/clusterfuzz-testcase-minimized-6197200012967936

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <one...@gmail.com>
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fe9242204d33db070b8a9d907d93c9ead8a6f3ee
---

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

diff --git a/libavcodec/ylc.c b/libavcodec/ylc.c
index bf55e37be1..ae46b3b8c2 100644
--- a/libavcodec/ylc.c
+++ b/libavcodec/ylc.c
@@ -69,7 +69,7 @@ static void get_tree_codes(uint32_t *bits, int16_t *lens, 
uint8_t *xlat,
 
     s = nodes[node].sym;
     if (s != -1) {
-        bits[*pos] = (~pfx) & ((1 << FFMAX(pl, 1)) - 1);
+        bits[*pos] = (~pfx) & ((1U << FFMAX(pl, 1)) - 1);
         lens[*pos] = FFMAX(pl, 1);
         xlat[*pos] = s + (pl == 0);
         (*pos)++;

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