From fe9242204d33db070b8a9d907d93c9ead8a6f3ee Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 8 Jul 2017 22:51:57 +0200 Subject: [PATCH] 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 Signed-off-by: Michael Niedermayer --- 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)++;