Commit 9ae3ae0b authored Feb 26, 2008 by Alexandre Rusev Committed by Russell King Feb 29, 2008

[ARM] 4839/1: fixes kernel Oops in /dev/mem device driver for memory map with PHYS_OFF



"cat /dev/mem" may cause kernel Oops for boards with PHYS_OFFSET != 0
because character device is mapped to addresses starting from zero
and there is no protection against such situation.
Patch just add this.

Signed-off-by: Alexandre Rusev <arusev@ru.mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent c710e39c

arch/arm/mm/mmap.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -120,6 +120,8 @@ full_search:
		*/
		int valid_phys_addr_range(unsigned long addr, size_t size)
		{
		if (addr < PHYS_OFFSET)
		return 0;
		if (addr + size > __pa(high_memory))
		return 0;