• Guillaume Nault's avatar
    ppp: fix pppoe_dev deletion condition in pppoe_release() · 1acea4f6
    Guillaume Nault authored
    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: 2b018d57
    
     ("pppoe: drop PPPOX_ZOMBIEs in pppoe_release")
    Signed-off-by: default avatarGuillaume Nault <g.nault@alphalink.fr>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    1acea4f6