avcodec/exr: fix invalid shift in unpack_14()
authorMichael Niedermayer <michael@niedermayer.cc>
Wed, 21 Feb 2018 03:29:44 +0000 (04:29 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Tue, 27 Feb 2018 18:37:06 +0000 (19:37 +0100)
Fixes: 6154/clusterfuzz-testcase-minimized-5762231061970944
Fixes: runtime error: shift exponent 63 is too large for 32-bit type 'int'

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/exr.c

index 444af17..5253cc3 100644 (file)
@@ -899,7 +899,7 @@ static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
 
 static void unpack_14(const uint8_t b[14], uint16_t s[16])
 {
-    unsigned short shift = (b[ 2] >> 2);
+    unsigned short shift = (b[ 2] >> 2) & 15;
     unsigned short bias = (0x20 << shift);
     int i;