diff options
| author | Al Viro <viro@ZenIV.linux.org.uk> | 2011-09-14 18:55:41 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-10-03 11:40:30 -0700 |
| commit | 97abc52eb26f2ae8d033100c4c024e6138bdfd60 (patch) | |
| tree | 660d97e12cbb27d4b725429d1e17b84af0d0e1c5 /fs | |
| parent | a4f5172f4f84d22889d97c527cd8fe7430f075ae (diff) | |
restore pinning the victim dentry in vfs_rmdir()/vfs_rename_dir()
commit 1d2ef5901483004d74947bbf78d5146c24038fe7 upstream.
We used to get the victim pinned by dentry_unhash() prior to commit
64252c75a219 ("vfs: remove dget() from dentry_unhash()") and ->rmdir()
and ->rename() instances relied on that; most of them don't care, but
ones that used d_delete() themselves do. As the result, we are getting
rmdir() oopses on NFS now.
Just grab the reference before locking the victim and drop it explicitly
after unlocking, same as vfs_rename_other() does.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/namei.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/namei.c b/fs/namei.c index 14ab8d3f2f0c..b456c7a2e6b4 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2582,6 +2582,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry) if (!dir->i_op->rmdir) return -EPERM; + dget(dentry); mutex_lock(&dentry->d_inode->i_mutex); error = -EBUSY; @@ -2602,6 +2603,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry) out: mutex_unlock(&dentry->d_inode->i_mutex); + dput(dentry); if (!error) d_delete(dentry); return error; @@ -3005,6 +3007,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry, if (error) return error; + dget(new_dentry); if (target) mutex_lock(&target->i_mutex); @@ -3025,6 +3028,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry, out: if (target) mutex_unlock(&target->i_mutex); + dput(new_dentry); if (!error) if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE)) d_move(old_dentry,new_dentry); |