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Message-Id: <2a714162f8873153edeab6df8c63befa48473337.1402303821.git.jslaby@suse.cz> Date: Mon, 9 Jun 2014 10:50:11 +0200 From: Jiri Slaby <jslaby@...e.cz> To: stable@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Liu Hua <sdu.liu@...wei.com>, Russell King <rmk+kernel@....linux.org.uk>, Jiri Slaby <jslaby@...e.cz> Subject: [PATCH 3.12 076/146] ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr From: Liu Hua <sdu.liu@...wei.com> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 8fad87bca7ac9737e413ba5f1656f1114a8c314d upstream. 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@...wei.com> Signed-off-by: Russell King <rmk+kernel@....linux.org.uk> Signed-off-by: Jiri Slaby <jslaby@...e.cz> --- arch/arm/kernel/crash_dump.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/kernel/crash_dump.c b/arch/arm/kernel/crash_dump.c index 90c50d4b43f7..5d1286d51154 100644 --- a/arch/arm/kernel/crash_dump.c +++ b/arch/arm/kernel/crash_dump.c @@ -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; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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