avcodec/aacdec_fixed: Fix multiple runtime error: shift exponent 127 is too large...
authorMichael Niedermayer <michael@niedermayer.cc>
Sun, 28 May 2017 01:34:09 +0000 (03:34 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Mon, 5 Jun 2017 21:16:54 +0000 (23:16 +0200)
Fixes: 1851/clusterfuzz-testcase-minimized-5692607495667712

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 6c3a63fc3d1be7ac947e38a165a299c9e5d37764)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/aacdec_fixed.c

index 2bd7429..0fcd350 100644 (file)
@@ -369,7 +369,9 @@ static void apply_dependent_coupling_fixed(AACContext *ac,
                     shift = (gain-1024) >> 3;
                 }
 
-                if (shift < 0) {
+                if (shift < -31) {
+                    // Nothing to do
+                } else if (shift < 0) {
                     shift = -shift;
                     round = 1 << (shift - 1);