vp9/update_prob: prevent out of bounds table read
authorJames Zern <jzern@google.com>
Tue, 30 Jun 2015 06:03:14 +0000 (23:03 -0700)
committerMichael Niedermayer <michaelni@gmx.at>
Tue, 30 Jun 2015 11:24:19 +0000 (13:24 +0200)
commite91f860ea74e11e9178500fe8794c47f57dbf48c
treeee0284e6167b11255631d77250f7b0c55d327840
parent088b410ea2eebcfdf57f7e0c419fe6be8d440eb6
vp9/update_prob: prevent out of bounds table read

the max value of the lookup in expanded form is:
(((1 << 7) - 1) << 1) - 65 + 1 + 64 = 254

add one entry of padding to inv_map_table[] to prevent out of bounds
access with non-conforming / fuzzed bitstreams

Signed-off-by: James Zern <jzern@google.com>
Reviewed-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libavcodec/vp9.c