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 <michael@niedermayer.cc>
4 years ago · 8f2856a1da
parent c2f5e9ff3c
commit 8f2856a1da
1 changed files with 1 additions and 1 deletions
--- 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)