linux-kernel - [08/90] bsdacct: fix uid/gid misreporting

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Message-Id: <20091217011558.884142808@mini.kroah.org>
Date:	Wed, 16 Dec 2009 17:14:19 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Alexey Dobriyan <adobriyan@...il.com>,
	Serge Hallyn <serue@...ibm.com>,
	David Howells <dhowells@...hat.com>,
	James Morris <jmorris@...ei.org>
Subject: [08/90] bsdacct: fix uid/gid misreporting

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Alexey Dobriyan <adobriyan@...il.com>

commit 4b731d50ff3df6b9141a6c12b088e8eb0109e83c upstream.

commit d8e180dcd5bbbab9cd3ff2e779efcf70692ef541 "bsdacct: switch
credentials for writing to the accounting file" introduced credential
switching during final acct data collecting.  However, uid/gid pair
continued to be collected from current which became credentials of who
created acct file, not who exits.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14676

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
Reported-by: Juho K. Juopperi <jkj@...si.fi>
Acked-by: Serge Hallyn <serue@...ibm.com>
Acked-by: David Howells <dhowells@...hat.com>
Reviewed-by: Michal Schmidt <mschmidt@...hat.com>
Cc: James Morris <jmorris@...ei.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 kernel/acct.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -536,7 +536,8 @@ static void do_acct_process(struct bsd_a
 	do_div(elapsed, AHZ);
 	ac.ac_btime = get_seconds() - elapsed;
 	/* we really need to bite the bullet and change layout */
-	current_uid_gid(&ac.ac_uid, &ac.ac_gid);
+	ac.ac_uid = orig_cred->uid;
+	ac.ac_gid = orig_cred->gid;
 #if ACCT_VERSION==2
 	ac.ac_ahz = AHZ;
 #endif

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