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authorJeff Mahoney <jeffm@suse.com>2005-07-27 11:43:38 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-27 16:25:50 -0700
commitb3bb8afd965159f155d4f629cbea158cbcc69275 (patch)
treefffcb983d26aa1d435ba8e2b788a7aaf0b6efce0
parentc9b3ad673460fc997a652cd58aa3a345d40e5218 (diff)
[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 <jeffm@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/reiserfs/inode.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 1aaf2c7d44e6..d9f614a57731 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;
}