This is a note to let you know that I've just added the patch titled
LOCKD: Fix a race when initialising nlmsvc_timeout
to the 3.18-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:
lockd-fix-a-race-when-initialising-nlmsvc_timeout.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 06bed7d18c2c07b3e3eeadf4bd357f6e806618cc Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Date: Fri, 2 Jan 2015 15:05:25 -0500
Subject: LOCKD: Fix a race when initialising nlmsvc_timeout
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
commit 06bed7d18c2c07b3e3eeadf4bd357f6e806618cc upstream.
This commit fixes a race whereby nlmclnt_init() first starts the lockd
daemon, and then calls nlm_bind_host() with the expectation that
nlmsvc_timeout has already been initialised. Unfortunately, there is no
no synchronisation between lockd() and lockd_up() to guarantee that this
is the case.
Fix is to move the initialisation of nlmsvc_timeout into lockd_create_svc
Fixes: 9a1b6bf818e74 ("LOCKD: Don't call utsname()->nodename...")
Cc: Bruce Fields <bfields@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 3.10.x
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/lockd/svc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -138,10 +138,6 @@ lockd(void *vrqstp)
dprintk("NFS locking service started (ver " LOCKD_VERSION ").\n");
- if (!nlm_timeout)
- nlm_timeout = LOCKD_DFLT_TIMEO;
- nlmsvc_timeout = nlm_timeout * HZ;
-
/*
* The main request loop. We don't terminate until the last
* NFS mount or NFS daemon has gone away.
@@ -350,6 +346,10 @@ static struct svc_serv *lockd_create_svc
printk(KERN_WARNING
"lockd_up: no pid, %d users??\n", nlmsvc_users);
+ if (!nlm_timeout)
+ nlm_timeout = LOCKD_DFLT_TIMEO;
+ nlmsvc_timeout = nlm_timeout * HZ;
+
serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL);
if (!serv) {
printk(KERN_WARNING "lockd_up: create service failed\n");
Patches currently in stable-queue which might be from trond.myklebust@xxxxxxxxxxxxxxx are
queue-3.18/lockd-fix-a-race-when-initialising-nlmsvc_timeout.patch
queue-3.18/nfsv4.1-fix-client-id-trunking-on-linux.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html