[CIFS] add extra null attr check

Although attr == NULL can not happen, this makes cifs_set_file_info safer
in the future since it may not be obvious that the caller can not set
attr to NULL.

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 4690a360c85..a8797cc6080 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -763,6 +763,9 @@ cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
         struct cifsTconInfo *pTcon = cifs_sb->tcon;
         FILE_BASIC_INFO info_buf;
 
+        if (attrs == NULL)
+                return -EINVAL;
+
         if (attrs->ia_valid & ATTR_ATIME) {
                 set_time = true;
                 info_buf.LastAccessTime =