| title: | PATCH 16 30 nfs BUG ON in nfs follow mount |
|
From: Denis V. Lunev <den@xxxxxxxxxx
Unfortunately, BUG_ON(IS_ROOT(dentry)) can happen inside
nfs_follow_mountpoint with NFS running Fedora 8 using a
specific setup.
rel="nofollow" bugzilla.redhat.com/show_bug.cgi?id=458622 bugzilla.redhat.com/show_bug.cgi?id=458622
So, the situation should be handled on NFS client gracefully.
Signed-off-by: Denis V. Lunev <den@xxxxxxxxxx
CC: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx
CC: J. Bruce Fields <bfields@xxxxxxxxxxxx
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx
---
fs/nfs/namespace.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index d398775..64a288e 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -105,7 +105,10 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
dprintk("-- nfs_follow_mountpoint()
");
- BUG_ON(IS_ROOT(dentry));
+ err = -ESTALE;
+ if (IS_ROOT(dentry))
+ goto out_err;
+
dprintk("%s: enter
", __func__);
dput(nd- path.dentry);
nd- path.dentry = dget(dentry);
--
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