[FFmpeg-devel] [PATCH] avcodec/sbrdsp_template: Fix: runtime error: signed integer overflow: 849815297 + 1315389781 cannot be represented in type 'int'

[Michael Niedermayer]

Fixes: 1770/clusterfuzz-testcase-minimized-5285511235108864

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
 libavcodec/sbrdsp_template.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/libavcodec/sbrdsp_template.c b/libavcodec/sbrdsp_template.c
index b649dfd7ee..897a3bbffb 100644
--- a/libavcodec/sbrdsp_template.c
+++ b/libavcodec/sbrdsp_template.c
@@ -33,8 +33,13 @@ static void sbr_qmf_deint_bfly_c(INTFLOAT *v, const INTFLOAT *src0, const INTFLO
 {
     int i;
     for (i = 0; i < 64; i++) {
-        v[      i] = AAC_SRA_R((src0[i] - src1[63 - i]), 5);
-        v[127 - i] = AAC_SRA_R((src0[i] + src1[63 - i]), 5);
+#if USE_FIXED
+        v[      i] = (int)(0x10U + src0[i] - src1[63 - i]) >> 5;
+        v[127 - i] = (int)(0x10U + src0[i] + src1[63 - i]) >> 5;
+#else
+        v[      i] = src0[i] - src1[63 - i];
+        v[127 - i] = src0[i] + src1[63 - i];
+#endif
     }
 }
 
-- 
2.13.0