From 7669173fe540ee67c2bfb2d2f03bf64ee49a2fef Mon Sep 17 00:00:00 2001
From: Andi Kleen <ak@suse.de>
Date: Tue, 14 Nov 2006 16:57:46 +0100
Subject: [PATCH] --- yaml --- r: 40923 b: refs/heads/master c:
 5e58a02a8f6a7a1c9ae41f39286bcd3aea0d6f24 h: refs/heads/master i:   40921:
 6e4a5ad1245c765e02037662162de1eb9a6d006a   40919:
 9e7e1f6e56c60815fbe0211665dae94069b1a0ed v: v3

---
 [refs]                      |  2 +-
 trunk/arch/x86_64/mm/init.c | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 5178ff0c8c1e..5ed273eb1726 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 51d67a488b53a5cc8401460480c124eaec71e2d4
+refs/heads/master: 5e58a02a8f6a7a1c9ae41f39286bcd3aea0d6f24
diff --git a/trunk/arch/x86_64/mm/init.c b/trunk/arch/x86_64/mm/init.c
index 971dc1181e69..f1f977aafae1 100644
--- a/trunk/arch/x86_64/mm/init.c
+++ b/trunk/arch/x86_64/mm/init.c
@@ -655,9 +655,22 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 
 void __init reserve_bootmem_generic(unsigned long phys, unsigned len) 
 { 
-	/* Should check here against the e820 map to avoid double free */ 
 #ifdef CONFIG_NUMA
 	int nid = phys_to_nid(phys);
+#endif
+	unsigned long pfn = phys >> PAGE_SHIFT;
+	if (pfn >= end_pfn) {
+		/* This can happen with kdump kernels when accessing firmware
+		   tables. */
+		if (pfn < end_pfn_map)
+			return;
+		printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n",
+				phys, len);
+		return;
+	}
+
+	/* Should check here against the e820 map to avoid double free */
+#ifdef CONFIG_NUMA
   	reserve_bootmem_node(NODE_DATA(nid), phys, len);
 #else       		
 	reserve_bootmem(phys, len);