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-rw-r--r--fs/nfs/super.c30
1 files changed, 24 insertions, 6 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index f120be43d543..041fe9e9b74d 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -641,6 +641,26 @@ static int nfs_verify_server_address(struct sockaddr *addr)
}
/*
+ * Parse string addresses passed in via a mount option,
+ * and construct a sockaddr based on the result.
+ *
+ * If address parsing fails, set the sockaddr's address
+ * family to AF_UNSPEC to force nfs_verify_server_address()
+ * to punt the mount.
+ */
+static void nfs_parse_server_address(char *value,
+ struct sockaddr *sap)
+{
+ struct sockaddr_in *ap = (void *)sap;
+
+ ap->sin_family = AF_INET;
+ if (in4_pton(value, -1, (u8 *)&ap->sin_addr.s_addr, '\0', NULL))
+ return;
+
+ sap->sa_family = AF_UNSPEC;
+}
+
+/*
* Error-check and convert a string of mount options from user space into
* a data structure
*/
@@ -963,9 +983,8 @@ static int nfs_parse_mount_options(char *raw,
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- mnt->nfs_server.address.sin_family = AF_INET;
- mnt->nfs_server.address.sin_addr.s_addr =
- in_aton(string);
+ nfs_parse_server_address(string, (struct sockaddr *)
+ &mnt->nfs_server.address);
kfree(string);
break;
case Opt_clientaddr:
@@ -984,9 +1003,8 @@ static int nfs_parse_mount_options(char *raw,
string = match_strdup(args);
if (string == NULL)
goto out_nomem;
- mnt->mount_server.address.sin_family = AF_INET;
- mnt->mount_server.address.sin_addr.s_addr =
- in_aton(string);
+ nfs_parse_server_address(string, (struct sockaddr *)
+ &mnt->mount_server.address);
kfree(string);
break;