There is a bug in error handling of lock_parent() in ecryptfs_do_create():
lock_parent() acquries mutex even if dget_parent() fails, so mutex should be unlocked anyway.
But dget_parent() does not fail, so the patch just removes unneeded buggy code.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
fs/ecryptfs/inode.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index d4a9431ec73c..97735c75085f 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -192,12 +192,6 @@ ecryptfs_do_create(struct inode *directory_inode,
lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
lower_dir_dentry = lock_parent(lower_dentry);
- if (IS_ERR(lower_dir_dentry)) {
- ecryptfs_printk(KERN_ERR, "Error locking directory of "
- "dentry\n");
- inode = ERR_CAST(lower_dir_dentry);
- goto out;
- }
rc = vfs_create(lower_dir_dentry->d_inode, lower_dentry, mode, true);
if (rc) {
printk(KERN_ERR "%s: Failure to create dentry in lower fs; "
@@ -215,7 +209,6 @@ ecryptfs_do_create(struct inode *directory_inode,
fsstack_copy_inode_size(directory_inode, lower_dir_dentry->d_inode);
out_lock:
unlock_dir(lower_dir_dentry);
-out:
return inode;
}
--
1.9.1
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