From a9e4ef620cb73c7fcf5e055a1f03ab359e358fe7 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 21 Jun 2019 00:47:16 +0200 Subject: [PATCH] avcodec/alsdec: Fixes signed integer overflow in LSB addition Fixes: signed integer overflow: 8 * 536870912 cannot be represented in type 'int' Fixes: 15281/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5744458785619968 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 7f527021df73b4792323f38f84a4bf2fbe5a2052) Signed-off-by: Michael Niedermayer --- libavcodec/alsdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c index 96cfbbf1fe..4b69775414 100644 --- a/libavcodec/alsdec.c +++ b/libavcodec/alsdec.c @@ -867,7 +867,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd) res >>= 1; if (cur_k) { - res *= 1 << cur_k; + res *= 1U << cur_k; res |= get_bits_long(gb, cur_k); } }