From: Chen Gang <gang.chen@asianux.com>
Date: Mon, 25 Feb 2013 16:51:49 +0000 (+0000)
Subject: powerpc/pseries/hvcserver: Fix strncpy buffer limit in location code
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=6b6680c4ea3952af8ae76915cbca41245147741b;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

powerpc/pseries/hvcserver: Fix strncpy buffer limit in location code

the dest buf len is 80 (HVCS_CLC_LENGTH + 1).
  the src buf len is PAGE_SIZE.
  if src buf string len is more than 80, it will cause issue.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/arch/powerpc/platforms/pseries/hvcserver.c b/arch/powerpc/platforms/pseries/hvcserver.c
index fcf4b4cbeaf3..4557e91626c4 100644
--- a/arch/powerpc/platforms/pseries/hvcserver.c
+++ b/arch/powerpc/platforms/pseries/hvcserver.c
@@ -23,6 +23,7 @@
 #include <linux/list.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/string.h>
 
 #include <asm/hvcall.h>
 #include <asm/hvcserver.h>
@@ -188,9 +189,9 @@ int hvcs_get_partner_info(uint32_t unit_address, struct list_head *head,
 			= (unsigned int)last_p_partition_ID;
 
 		/* copy the Null-term char too */
-		strncpy(&next_partner_info->location_code[0],
+		strlcpy(&next_partner_info->location_code[0],
 			(char *)&pi_buff[2],
-			strlen((char *)&pi_buff[2]) + 1);
+			sizeof(next_partner_info->location_code));
 
 		list_add_tail(&(next_partner_info->node), head);
 		next_partner_info = NULL;