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Commit 44d5759d authored by Denis V. Lunev's avatar Denis V. Lunev Committed by Trond Myklebust
Browse files

nfs: BUG_ON in nfs_follow_mountpoint 

Unfortunately, BUG_ON(IS_ROOT(dentry)) can happen inside
nfs_follow_mountpoint with NFS running Fedora 8 using a
specific setup.
https://bugzilla.redhat.com/show_bug.cgi?id=458622



So, the situation should be handled on NFS client gracefully.

Signed-off-by: default avatarDenis V. Lunev <den@openvz.org>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
CC: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent c9f6cde6

fs/nfs/namespace.c

+4 −1
Original line number Diff line number Diff line
@@ -105,7 +105,10 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd) 


	dprintk("--> nfs_follow_mountpoint()\n");



	BUG_ON(IS_ROOT(dentry));

	err = -ESTALE;

	if (IS_ROOT(dentry))

		goto out_err;



	dprintk("%s: enter\n", __func__);

	dput(nd->path.dentry);

	nd->path.dentry = dget(dentry);