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Vasily Averin 117dd2165e lockd: lost rollback of set_grace_period() in lockd_down_net()

commit 3a2b19d1ee upstream.

Commit efda760fe9 ("lockd: fix lockd shutdown race") is incorrect,
it removes lockd_manager and disarm grace_period_end for init_net only.

If nfsd was started from another net namespace lockd_up_net() calls
set_grace_period() that adds lockd_manager into per-netns list
and queues grace_period_end delayed work.

These action should be reverted in lockd_down_net().
Otherwise it can lead to double list_add on after restart nfsd in netns,
and to use-after-free if non-disarmed delayed work will be executed after netns destroy.

Fixes: efda760fe9 ("lockd: fix lockd shutdown race")
Cc: stable@vger.kernel.org
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-05-19 10:27:00 +02:00

clnt4xdr.c

nfsd: remove <linux/nfsd/nfsfh.h>

2014-05-06 17:54:53 -04:00

clntlock.c

LOCKD: Don't call utsname()->nodename from nlmclnt_setlockargs

2013-08-05 15:03:46 -04:00

clntproc.c

Move locks API users to locks_lock_inode_wait()

2015-10-22 14:57:36 -04:00

clntxdr.c

nfsd: remove <linux/nfsd/nfsfh.h>