From: <gregkh@linuxfoundation.org>
To: g.nault@alphalink.fr, davem@davemloft.net, gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "ppp: fix pppoe_dev deletion condition in pppoe_release()" has been added to the 4.2-stable tree
Date: Tue, 17 Nov 2015 14:41:38 -0800 [thread overview]
Message-ID: <14478000986414@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
ppp: fix pppoe_dev deletion condition in pppoe_release()
to the 4.2-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:
ppp-fix-pppoe_dev-deletion-condition-in-pppoe_release.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Tue Nov 17 14:34:38 PST 2015
From: Guillaume Nault <g.nault@alphalink.fr>
Date: Thu, 22 Oct 2015 16:57:10 +0200
Subject: ppp: fix pppoe_dev deletion condition in pppoe_release()
From: Guillaume Nault <g.nault@alphalink.fr>
[ Upstream commit 1acea4f6ce1b1c0941438aca75dd2e5c6b09db60 ]
We can't rely on PPPOX_ZOMBIE to decide whether to clear po->pppoe_dev.
PPPOX_ZOMBIE can be set by pppoe_disc_rcv() even when po->pppoe_dev is
NULL. So we have no guarantee that (sk->sk_state & PPPOX_ZOMBIE) implies
(po->pppoe_dev != NULL).
Since we're releasing a PPPoE socket, we want to release the pppoe_dev
if it exists and reset sk_state to PPPOX_DEAD, no matter the previous
value of sk_state. So we can just check for po->pppoe_dev and avoid any
assumption on sk->sk_state.
Fixes: 2b018d57ff18 ("pppoe: drop PPPOX_ZOMBIEs in pppoe_release")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ppp/pppoe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -589,7 +589,7 @@ static int pppoe_release(struct socket *
po = pppox_sk(sk);
- if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND | PPPOX_ZOMBIE)) {
+ if (po->pppoe_dev) {
dev_put(po->pppoe_dev);
po->pppoe_dev = NULL;
}
Patches currently in stable-queue which might be from g.nault@alphalink.fr are
queue-4.2/ppp-fix-pppoe_dev-deletion-condition-in-pppoe_release.patch
reply other threads:[~2015-11-17 22:41 UTC|newest]
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