commit 86c8db86af43f52f682e53a0f2f0828683be1e52 upstream.
We should count the terminating NUL byte as part of the ctx_len.
Otherwise, UBSAN logs a warning:
UBSAN: array-index-out-of-bounds in security/selinux/xfrm.c:99:14
index 60 is out of range for type 'char [*]'
The allocation itself is correct so there is no actual out of bounds
indexing, just a warning.
Cc: stable@vger.kernel.org
Suggested-by: Christian Göttsche <cgzones@googlemail.com>
Link: https://lore.kernel.org/selinux/CAEjxPJ6tA5+LxsGfOJokzdPeRomBHjKLBVR6zbrg+_w3ZZbM3A@mail.gmail.com/
Signed-off-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 2753481c40af6feb897944369dd1279d7e2596d5)
983dddeb79