From: Matthew Leach <matthew.leach@arm.com>
Date: Fri, 21 Sep 2012 17:56:11 +0000 (+0100)
Subject: ARM: 7540/1: kexec: Check segment memory addresses
X-Git-Tag: next-20120927~119^2~2^5
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c564df4db85aac8d1d65a56176a0a25f46138064;p=karo-tx-linux.git

ARM: 7540/1: kexec: Check segment memory addresses

Ensure that the memory regions that are set within the segments
correspond to physical contiguous memory regions.

Reviewed-by: Simon Horman <horms@verge.net.au>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index dee34efca748..e29c3337ca81 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -8,6 +8,7 @@
 #include <linux/reboot.h>
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/memblock.h>
 #include <asm/pgtable.h>
 #include <linux/of_fdt.h>
 #include <asm/pgalloc.h>
@@ -44,6 +45,11 @@ int machine_kexec_prepare(struct kimage *image)
 	for (i = 0; i < image->nr_segments; i++) {
 		current_segment = &image->segment[i];
 
+		err = memblock_is_region_memory(current_segment->mem,
+						current_segment->memsz);
+		if (err)
+			return - EINVAL;
+
 		err = get_user(header, (__be32*)current_segment->buf);
 		if (err)
 			return err;