From b3bb8afd965159f155d4f629cbea158cbcc69275 Mon Sep 17 00:00:00 2001 From: Jeff Mahoney Date: Wed, 27 Jul 2005 11:43:38 -0700 Subject: [PATCH] [PATCH] reiserfs: fix deadlock in inode creation failure path w/ default ACL reiserfs_new_inode() can call iput() with the xattr lock held. This will cause a deadlock to occur when reiserfs_delete_xattrs() is called to clean up. The following patch releases the lock and reacquires it after the iput. This is safe because interaction with xattrs is complete, and the relock is just to balance out the release in the caller. The locking needs some reworking to be more sane, but that's more intrusive and I was just looking to fix this bug. Signed-off-by: Jeff Mahoney Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/reiserfs/inode.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index 1aaf2c7d44e..d9f614a5773 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -1980,7 +1980,17 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th, out_inserted_sd: inode->i_nlink = 0; th->t_trans_id = 0; /* so the caller can't use this handle later */ - iput(inode); + + /* If we were inheriting an ACL, we need to release the lock so that + * iput doesn't deadlock in reiserfs_delete_xattrs. The locking + * code really needs to be reworked, but this will take care of it + * for now. -jeffm */ + if (REISERFS_I(dir)->i_acl_default) { + reiserfs_write_unlock_xattrs(dir->i_sb); + iput(inode); + reiserfs_write_lock_xattrs(dir->i_sb); + } else + iput(inode); return err; } -- 2.20.1