From 8f2856a1daa4e3d5767b6efe7a70ec86926dba47 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 30 Jul 2021 23:04:08 +0200 Subject: [PATCH] avcodec/sbrdsp_fixed: Fix negation overflow in sbr_neg_odd_64_c() Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself Fixes: 35593/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-5182217725804544 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/sbrdsp_fixed.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/sbrdsp_fixed.c b/libavcodec/sbrdsp_fixed.c index 91fa664c08..43fcc90ae5 100644 --- a/libavcodec/sbrdsp_fixed.c +++ b/libavcodec/sbrdsp_fixed.c @@ -87,7 +87,7 @@ static void sbr_neg_odd_64_c(int *x) { int i; for (i = 1; i < 64; i += 2) - x[i] = -x[i]; + x[i] = -(unsigned)x[i]; } static void sbr_qmf_pre_shuffle_c(int *z)