Commit 8fad87bc authored Mar 27, 2014 by Liu Hua Committed by Russell King Apr 07, 2014

ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr



When we configure CONFIG_ARM_LPAE=y, pfn << PAGE_SHIFT will
overflow if pfn >= 0x100000 in copy_oldmem_page.
So use __pfn_to_phys for converting.

Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent c7d442f4

arch/arm/kernel/crash_dump.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -39,7 +39,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
		if (!csize)
		return 0;

		vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE);
		vaddr = ioremap(__pfn_to_phys(pfn), PAGE_SIZE);
		if (!vaddr)
		return -ENOMEM;