Hi All
I came across this panic due to bad server and I am wondering
why should an nfs client panic when stumbling upon an IS_ROOT dentry
in the point where it tries to cross mount. I mean: should an 'Innocent' client
'pay' for bad server behavior?
Is it unsafe to just clear the path and return error?
--- a/namespace.c 2008-08-03 12:29:21.000000000 +0300
+++ b/namespace.c 2008-08-03 12:30:54.000000000 +0300
@@ -100,7 +100,11 @@
dprintk("--> nfs_follow_mountpoint()\n");
- BUG_ON(IS_ROOT(dentry));
+ if (IS_ROOT(dentry)) {
+ err = -EBUSY; // or any reasonable error
+ goto out_err;
+
+ }
dprintk("%s: enter\n", __FUNCTION__);
dput(nd->dentry);
nd->dentry = dget(dentry);
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