CIFS: Protect i_nlink from being negative

[~andy/linux] / fs / cifs / link.c

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 09e4b3ae45640e3d0c1bd8757cc6da935fca65f5..e6ce3b1128756be4496494b2623fab27fa0d165f 100644 (file)
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -433,7 +433,9 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode,
        if (old_file->d_inode) {
                cifsInode = CIFS_I(old_file->d_inode);
                if (rc == 0) {
+                       spin_lock(&old_file->d_inode->i_lock);
                        inc_nlink(old_file->d_inode);
+                       spin_unlock(&old_file->d_inode->i_lock);
 /* BB should we make this contingent on superblock flag NOATIME? */
 /*                     old_file->d_inode->i_ctime = CURRENT_TIME;*/
                        /* parent dir timestamps will update from srv