-stable review patch. If anyone has any objections, please let us know.
------------------
From: Jan Kara <[email protected]>
[PATCH] Fix reiserfs deadlock
reiserfs_cache_default_acl() should return whether we successfully found
the acl or not. We have to return correct value even if reiserfs_get_acl()
returns error code and not just 0. Otherwise callers such as
reiserfs_mkdir() can unnecessarily lock the xattrs and later functions such
as reiserfs_new_inode() fail to notice that we have already taken the lock
and try to take it again with obvious consequences.
Signed-off-by: Jan Kara <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/reiserfs/xattr_acl.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- linux-2.6.16.11.orig/fs/reiserfs/xattr_acl.c
+++ linux-2.6.16.11/fs/reiserfs/xattr_acl.c
@@ -408,8 +408,9 @@ int reiserfs_cache_default_acl(struct in
acl = reiserfs_get_acl(inode, ACL_TYPE_DEFAULT);
reiserfs_read_unlock_xattrs(inode->i_sb);
reiserfs_read_unlock_xattr_i(inode);
- ret = acl ? 1 : 0;
- posix_acl_release(acl);
+ ret = (acl && !IS_ERR(acl));
+ if (ret)
+ posix_acl_release(acl);
}
return ret;
--
-
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