From: Renaud Lottiaux <renaud.lottiaux@kerlabs.com>
Date: Tue, 30 Jun 2009 18:41:34 +0000 (-0700)
Subject: bsdacct: fix access to invalid filp in acct_on()
X-Git-Tag: v2.6.27.26~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=339d06aaa1aff1ac0d73987ec4f90836aac62d76;p=pandora-kernel.git

bsdacct: fix access to invalid filp in acct_on()

commit df279ca8966c3de83105428e3391ab17690802a9 upstream.

The file opened in acct_on and freshly stored in the ns->bacct struct can
be closed in acct_file_reopen by a concurrent call after we release
acct_lock and before we call mntput(file->f_path.mnt).

Record file->f_path.mnt in a local variable and use this variable only.

Signed-off-by: Renaud Lottiaux <renaud.lottiaux@kerlabs.com>
Signed-off-by: Louis Rilling <louis.rilling@kerlabs.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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