tree cdf051b38220c6d99a6f4aac372d7b95eda26c6a
parent 0732f87761dbe417cb6e084b712d07e879e876ef
author Mike Frysinger <vapier@gentoo.org> 1244959202 -0400
committer Arnd Bergmann <arnd@arndb.de> 1245416287 +0200

asm-generic: uaccess: add missing access_ok() check to strnlen_user()

The strnlen_user() function was missing a access_ok() check on the pointer
given.  We've had cases on Blackfin systems where test programs caused
kernel crashes here because userspace passed up a NULL/-1 pointer and the
kernel gladly attempted to run strlen() on it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>