From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:50482 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752922AbdLDKyz (ORCPT ); Mon, 4 Dec 2017 05:54:55 -0500 Subject: Patch "nfsd: fix panic in posix_unblock_lock called from nfs4_laundromat" has been added to the 4.9-stable tree To: honda@math.sci.hokudai.ac.jp, bfields@redhat.com, gregkh@linuxfoundation.org, jlayton@redhat.com Cc: , From: Date: Mon, 04 Dec 2017 11:53:34 +0100 Message-ID: <151238481425103@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled nfsd: fix panic in posix_unblock_lock called from nfs4_laundromat to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: nfsd-fix-panic-in-posix_unblock_lock-called-from-nfs4_laundromat.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 64ebe12494fd5d193f014ce38e1fd83cc57883c8 Mon Sep 17 00:00:00 2001 From: Naofumi Honda Date: Thu, 9 Nov 2017 10:57:16 -0500 Subject: nfsd: fix panic in posix_unblock_lock called from nfs4_laundromat From: Naofumi Honda commit 64ebe12494fd5d193f014ce38e1fd83cc57883c8 upstream. >>From kernel 4.9, my two nfsv4 servers sometimes suffer from "panic: unable to handle kernel page request" in posix_unblock_lock() called from nfs4_laundromat(). These panics diseappear if we revert the commit "nfsd: add a LRU list for blocked locks". The cause appears to be a typo in nfs4_laundromat(), which is also present in nfs4_state_shutdown_net(). Fixes: 7919d0a27f1e "nfsd: add a LRU list for blocked locks" Cc: jlayton@redhat.com Reveiwed-by: Jeff Layton Signed-off-by: J. Bruce Fields Signed-off-by: Greg Kroah-Hartman --- fs/nfsd/nfs4state.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4732,7 +4732,7 @@ nfs4_laundromat(struct nfsd_net *nn) spin_unlock(&nn->blocked_locks_lock); while (!list_empty(&reaplist)) { - nbl = list_first_entry(&nn->blocked_locks_lru, + nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, nbl_lru); list_del_init(&nbl->nbl_lru); posix_unblock_lock(&nbl->nbl_lock); @@ -7143,7 +7143,7 @@ nfs4_state_shutdown_net(struct net *net) spin_unlock(&nn->blocked_locks_lock); while (!list_empty(&reaplist)) { - nbl = list_first_entry(&nn->blocked_locks_lru, + nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, nbl_lru); list_del_init(&nbl->nbl_lru); posix_unblock_lock(&nbl->nbl_lock); Patches currently in stable-queue which might be from honda@math.sci.hokudai.ac.jp are queue-4.9/nfsd-fix-panic-in-posix_unblock_lock-called-from-nfs4_laundromat.patch