From: David S. Miller <davem@sunset.davemloft.net>
Date: Thu, 29 Sep 2005 04:48:25 +0000 (-0700)
Subject: [SPARC64]: Solidify check in cheetah_check_main_memory().
X-Git-Tag: v2.6.14-rc3~33^2~4
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed3ffaf7b5e0262cb860f106a6632933671cc88f;p=linux-2.6

[SPARC64]: Solidify check in cheetah_check_main_memory().

Need to make sure the address is below high_memory before
passing it to kern_addr_valid().

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index eeb1e835c4..7f190fc575 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -1333,6 +1333,9 @@ static int cheetah_check_main_memory(unsigned long paddr)
 {
 	unsigned long vaddr = PAGE_OFFSET + paddr;
 
+	if (vaddr > high_memory)
+		return 0;
+
 	return kern_addr_valid(vaddr);
 }