From 03a9e6ff303ad82e75b734edbe4917ca5fd60159 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 22 Jul 2017 02:57:12 +0200 Subject: [PATCH] avcodec/ylc: Fix shift overflow Fixes: runtime error: shift exponent 32 is too large for 32-bit type 'unsigned int' Fixes: 2698/clusterfuzz-testcase-minimized-4713541443518464 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg 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 ae46b3b8c2..11333222b9 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) & ((1U << FFMAX(pl, 1)) - 1); + bits[*pos] = (~pfx) & ((1ULL << FFMAX(pl, 1)) - 1); lens[*pos] = FFMAX(pl, 1); xlat[*pos] = s + (pl == 0); (*pos)++;