[FFmpeg-devel] [PATCH 1/4] avcodec/aacpsdsp_template: Fix integer overflow in ps_hybrid_analysis_c()

[Michael Niedermayer]

Fixes: signed integer overflow: -1539565182 + -798086761 cannot be represented in type 'int'
Fixes: 14807/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-564925382682214

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/aacpsdsp_template.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libavcodec/aacpsdsp_template.c b/libavcodec/aacpsdsp_template.c
index 5f4be017d5..eef8adc7e2 100644
--- a/libavcodec/aacpsdsp_template.c
+++ b/libavcodec/aacpsdsp_template.c
@@ -54,10 +54,10 @@ static void ps_hybrid_analysis_c(INTFLOAT (*out)[2], INTFLOAT (*in)[2],
         INT64FLOAT sum_im = (INT64FLOAT)filter[i][6][0] * in[6][1];
 
         for (j = 0; j < 6; j++) {
-            INTFLOAT in0_re = in[j][0];
-            INTFLOAT in0_im = in[j][1];
-            INTFLOAT in1_re = in[12-j][0];
-            INTFLOAT in1_im = in[12-j][1];
+            INT64FLOAT in0_re = in[j][0];
+            INT64FLOAT in0_im = in[j][1];
+            INT64FLOAT in1_re = in[12-j][0];
+            INT64FLOAT in1_im = in[12-j][1];
             sum_re += (INT64FLOAT)filter[i][j][0] * (in0_re + in1_re) -
                       (INT64FLOAT)filter[i][j][1] * (in0_im - in1_im);
             sum_im += (INT64FLOAT)filter[i][j][0] * (in0_im + in1_im) +
-- 
2.21.0