tree 8f1b6bf16c9f6b340fa398d39f55bcc51be4f05e
parent b8c9a18712f7b617fda66d878ce3759c9e575ba0
author Trond Myklebust <Trond.Myklebust@netapp.com> 1199298537 -0500
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1199371031 -0500

NFS: Fix a possible Oops in fs/nfs/super.c

Sigh... commit 4584f520e1f773082ef44ff4f8969a5d992b16ec (NFS: Fix NFS
mountpoint crossing...) had a slight flaw: server can be NULL if sget()
returned an existing superblock.

Fix the fix by dereferencing s->s_fs_info.

Thanks to Coverity/Adrian Bunk and Frank Filz for spotting the bug.
(See http://bugzilla.kernel.org/show_bug.cgi?id=9647)

Also add in the same namespace Oops fix for NFSv4 in both the mountpoint
crossing case, and the referral case.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>