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authorAmir Goldstein <amir73il@gmail.com>2017-09-25 16:39:55 +0300
committerMiklos Szeredi <mszeredi@redhat.com>2017-10-05 16:53:18 +0300
commit5820dc0888d302ac05f8b91ffdf7e4e53b4fbf53 (patch)
treee22ae933b338fe9a51f34cef6658d82484aaff91 /fs/overlayfs/dir.c
parentdc7ab6773e8171e07f16fd0df0c5eea28c899503 (diff)
downloadlinux-5820dc0888d302ac05f8b91ffdf7e4e53b4fbf53.tar.xz
ovl: fix missing unlock_rename() in ovl_do_copy_up()
Use the ovl_lock_rename_workdir() helper which requires unlock_rename() only on lock success. Fixes: ("fd210b7d67ee ovl: move copy up lock out") Cc: <stable@vger.kernel.org> # v4.13 Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/dir.c')
-rw-r--r--fs/overlayfs/dir.c20
1 files changed, 0 insertions, 20 deletions
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 3309b1912241..cc961a3bd3bd 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -216,26 +216,6 @@ out_unlock:
return err;
}
-static int ovl_lock_rename_workdir(struct dentry *workdir,
- struct dentry *upperdir)
-{
- /* Workdir should not be the same as upperdir */
- if (workdir == upperdir)
- goto err;
-
- /* Workdir should not be subdir of upperdir and vice versa */
- if (lock_rename(workdir, upperdir) != NULL)
- goto err_unlock;
-
- return 0;
-
-err_unlock:
- unlock_rename(workdir, upperdir);
-err:
- pr_err("overlayfs: failed to lock workdir+upperdir\n");
- return -EIO;
-}
-
static struct dentry *ovl_clear_empty(struct dentry *dentry,
struct list_head *list)
{