[PATCH] afs: Replace simple_strtoul with kstrtoul in afs_parse_address

[Su Hui <suhui@xxxxxxxxxxxx>]

kstrtoul() is better because simple_strtoul() ignores overflow which
may lead to unexpected results.

Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
---
 fs/afs/addr_prefs.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/fs/afs/addr_prefs.c b/fs/afs/addr_prefs.c
index c0384201b8fe..ae4f4b371882 100644
--- a/fs/afs/addr_prefs.c
+++ b/fs/afs/addr_prefs.c
@@ -118,7 +118,10 @@ static int afs_parse_address(char *p, struct afs_addr_preference *pref)
 
 	if (*p == '/') {
 		p++;
-		tmp = simple_strtoul(p, &p, 10);
+		if (kstrtoul(p, 10, &tmp)) {
+			pr_warn("Invalid address\n");
+			return -EINVAL;
+		}
 		if (tmp > mask) {
 			pr_warn("Subnet mask too large\n");
 			return -EINVAL;
@@ -130,11 +133,6 @@ static int afs_parse_address(char *p, struct afs_addr_preference *pref)
 		mask = tmp;
 	}
 
-	if (*p) {
-		pr_warn("Invalid address\n");
-		return -EINVAL;
-	}
-
 	pref->subnet_mask = mask;
 	return 0;
 }
-- 
2.30.2