From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 14 Sep 2013 21:32:12 +0000 (-0400)
Subject: autofs4: close the races around autofs4_notify_daemon()
X-Git-Tag: v3.12-rc2~18^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=606035e76e79b14bf7a7c219140c045a952cc76e;p=pandora-kernel.git

autofs4: close the races around autofs4_notify_daemon()

Don't drop ->wq_mutex before calling autofs4_notify_daemon() only to regain it
there.  Besides being pointless, that opens a race window where autofs4_wait_release()
could've come and freed wq->name.name.  And do the debugging printk in the "reused an
existing wq" case before dropping ->wq_mutex - the same reason...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Ian Kent <raven@themaw.net>
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