renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-20 19:23:57 +08:00
Code

ceph: do not set r_old_dentry_dir on link()

Browse Source 
This is racy--we do not know whather d_parent has changed out from
underneath us because i_mutex is not held on the source inode's directory.

Also, taking this reference is useless.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Yan, Zheng <zheng.z.yan@intel.com>
This commit is contained in:
Sage Weil 2013-02-05 13:41:23 -08:00 committed by Yan, Zheng
parent 844d87c332
commit 4b58c9b19b
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/ceph/dir.c
View File

@ -812,8 +812,7 @@ static int ceph_link(struct dentry *old_dentry, struct inode *dir,
}
req->r_dentry = dget(dentry);
req->r_num_caps = 2;
req->r_old_dentry = dget(old_dentry); /* or inode? hrm. */
req->r_old_dentry_dir = ceph_get_dentry_parent_inode(old_dentry);
req->r_old_dentry = dget(old_dentry);
req->r_locked_dir = dir;
req->r_dentry_drop = CEPH_CAP_FILE_SHARED;
req->r_dentry_unless = CEPH_CAP_FILE_EXCL;