From 7e9ba78f6bd10edae77d1126ada109709e981e9f Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 25 Feb 2017 21:07:26 +0100 Subject: [PATCH] avcodec/flacdsp: Fix: runtime error: signed integer overflow: -1027555328 + -1226681270 cannot be represented in type 'int' Fixes: 673/clusterfuzz-testcase-5948736536576000 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer --- libavcodec/flacdsp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/flacdsp.c b/libavcodec/flacdsp.c index 560091f73a..bc9a5dbed9 100644 --- a/libavcodec/flacdsp.c +++ b/libavcodec/flacdsp.c @@ -67,7 +67,7 @@ static void flac_lpc_16_c(int32_t *decoded, const int coeffs[32], int sum = 0; for (j = 0; j < pred_order; j++) sum += coeffs[j] * (SUINT)decoded[j]; - decoded[j] += sum >> qlevel; + decoded[j] = decoded[j] + (unsigned)(sum >> qlevel); } }