• Cong Wang's avatar
    netrom: fix locking in nr_find_socket() · 7314f548
    Cong Wang authored
    nr_find_socket(), nr_find_peer() and nr_find_listener() lock the
    sock after finding it in the global list. However, the call path
    requires BH disabled for the sock lock consistently.
    
    Actually the locking is unnecessary at this point, we can just hold
    the sock refcnt to make sure it is not gone after we unlock the global
    list, and lock it later only when needed.
    
    Reported-and-tested-by: syzbot+f621cda8b7e598908efa@syzkaller.appspotmail.com
    Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    7314f548
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