From: "Denis V. Lunev" <[email protected]>
Unfortunately, BUG_ON(IS_ROOT(dentry)) can happen inside
nfs_follow_mountpoint with NFS running Fedora 8 using a specific setup.
See https://bugzilla.redhat.com/show_bug.cgi?id=458622
So the situation should be handled on NFS client gracefully.
Signed-off-by: Denis V. Lunev <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: J. Bruce Fields <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
fs/nfs/namespace.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff -puN fs/nfs/namespace.c~nfs-bug_on-in-nfs_follow_mountpoint fs/nfs/namespace.c
--- a/fs/nfs/namespace.c~nfs-bug_on-in-nfs_follow_mountpoint
+++ a/fs/nfs/namespace.c
@@ -105,7 +105,10 @@ static void * nfs_follow_mountpoint(stru
dprintk("--> nfs_follow_mountpoint()\n");
- BUG_ON(IS_ROOT(dentry));
+ err = -EIO;
+ if (IS_ROOT(dentry))
+ goto out_err;
+
dprintk("%s: enter\n", __func__);
dput(nd->path.dentry);
nd->path.dentry = dget(dentry);
_