avcodec/snowdec: Fix integer overflow in header parsing
authorMichael Niedermayer <michael@niedermayer.cc>
Sun, 5 Nov 2017 20:20:05 +0000 (21:20 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Fri, 1 Dec 2017 23:28:59 +0000 (00:28 +0100)
commitf33f13172cfe34b3bedb59964957d8d784f9cea0
tree75eda8cb53069d4d359ece6c924e9f5d8ebf668c
parentb9e9c5cee03ff9a092f9d8f13df22d91979c24e3
avcodec/snowdec: Fix integer overflow in header parsing

Fixes: 3984/clusterfuzz-testcase-minimized-5265759929368576
Fixes: runtime error: signed integer overflow: -1085585801 + -1094995529 cannot be represented in 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>
(cherry picked from commit c897a9285846b6a072b9650976afd4f091b7a71f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/snowdec.c