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| author | Guillaume Nault <g.nault@alphalink.fr> | 2015-10-22 16:57:10 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-23 03:30:01 -0700 |
| commit | 1acea4f6ce1b1c0941438aca75dd2e5c6b09db60 (patch) | |
| tree | 095cebc2ead8abbaa4165a650b5997da39911285 /drivers | |
| parent | f6b8dec99865ea906150e963eacbfd037b579ee9 (diff) | |
| download | linux-1acea4f6ce1b1c0941438aca75dd2e5c6b09db60.tar.gz linux-1acea4f6ce1b1c0941438aca75dd2e5c6b09db60.tar.bz2 linux-1acea4f6ce1b1c0941438aca75dd2e5c6b09db60.zip | |
ppp: fix pppoe_dev deletion condition in pppoe_release()
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ppp/pppoe.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c index 2ed75060da50..5e0b43283bce 100644 --- a/drivers/net/ppp/pppoe.c +++ b/drivers/net/ppp/pppoe.c @@ -589,7 +589,7 @@ static int pppoe_release(struct socket *sock) 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; } |