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reiserfs: deal with NULL xattr root w/ xattrs disabled

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This avoids an Oops in open_xa_root that can occur when deleting a file
with xattrs disabled.  It assumes that the xattr root will be there, and
that is not guaranteed.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jeff Mahoney
2009-05-17 01:02:02 -04:00
committed by Linus Torvalds
parent 12abb35a03
commit ceb5edc457
2 changed files with 3 additions and 3 deletions
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4
fs/reiserfs/xattr.c
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@@ -123,7 +123,9 @@ static struct dentry *open_xa_root(struct super_block *sb, int flags)
mutex_lock_nested(&privroot->d_inode->i_mutex, I_MUTEX_XATTR);
xaroot = dget(REISERFS_SB(sb)->xattr_root);
if (!xaroot->d_inode) {
if (!xaroot)
xaroot = ERR_PTR(-ENODATA);
else if (!xaroot->d_inode) {
int err = -ENODATA;
if (xattr_may_create(flags))
err = xattr_mkdir(privroot->d_inode, xaroot, 0700);