b162d09aaf02da3dee89520b10c07d92c8b
parent bf11d26cb96fe8221ef056eedab692e91634cc65
author Lennert Buytenhek <buytenh@wantstofly.org> 1158400222 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1159176326 +0100

[ARM] 3813/1: prevent >= 4G /dev/mem mmap()

Prevent userland from mapping in physical address regions >= 4G by
checking for that in valid_mmap_phys_addr_range().

Unfortunately, we cannot override valid_mmap_phys_addr_range() without
also overriding valid_phys_addr_range(), so copy drivers/char/mem.c's
version of valid_phys_addr_range() over to arch/arm/mm/mmap.c as well.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ázøM—