Commit 3fd9825c authored Feb 18, 2009 by Nicolas Pitre Committed by Russell King Feb 19, 2009

[ARM] 5402/1: fix a case of wrap-around in sanity_check_meminfo()



In the non highmem case, if two memory banks of 1GB each are provided,
the second bank would evade suppression since its virtual base would
be 0.  Fix this by disallowing any memory bank which virtual base
address is found to be lower than PAGE_OFFSET.

Reported-by: Lennert Buytenhek <buytenh@marvell.com>

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent fd4b9b36

arch/arm/mm/mmu.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -693,7 +693,8 @@ static void __init sanity_check_meminfo(void)
		* Check whether this memory bank would entirely overlap
		* the vmalloc area.
		*/
		if (__va(bank->start) >= VMALLOC_MIN) {
		if (__va(bank->start) >= VMALLOC_MIN \|\|
		__va(bank->start) < PAGE_OFFSET) {
		printk(KERN_NOTICE "Ignoring RAM at %.8lx-%.8lx "
		"(vmalloc region overlap).\n",
		bank->start, bank->start + bank->size - 1);

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