NFS: Fix inode corruption in nfs_prime_dcache()
authorTrond Myklebust <trond.myklebust@primarydata.com>
Thu, 22 Sep 2016 17:38:52 +0000 (13:38 -0400)
committerAnna Schumaker <Anna.Schumaker@Netapp.com>
Tue, 27 Sep 2016 18:31:52 +0000 (14:31 -0400)
commit7dc72d5f7a0ec97a53e126c46e2cbd2560757955
tree156b815db4fd3d78958bb3754a57855e02984c11
parent0a014a44a50839a8064618e959fae5bbc44c2fd5
NFS: Fix inode corruption in nfs_prime_dcache()

Due to inode number reuse in filesystems, we can end up corrupting the
inode on our client if we apply the file attributes without ensuring that
the filehandle matches.
Typical symptoms include spurious "mode changed" reports in the syslog.

We still do want to ensure that we don't invalidate the dentry if the
inode number matches, but we don't have a filehandle.

Fixes: fa9233699cc1 ("NFS: Don't require a filehandle to refresh...")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org # v4.0+
Tested-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
fs/nfs/dir.c