Messages in this thread Patch in this message | | | From | Mark Salyzyn <> | Subject | net/unix: sk_socket can disappear when state is unlocked | Date | Thu, 21 May 2015 09:25:32 -0700 |
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got a rare NULL pointer dereference in clear_bit
Signed-off-by: Mark Salyzyn <salyzyn@android.com> --- net/unix/af_unix.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 5266ea7..37a8925 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1880,6 +1880,11 @@ static long unix_stream_data_wait(struct sock *sk, long timeo, unix_state_unlock(sk); timeo = freezable_schedule_timeout(timeo); unix_state_lock(sk); + + /* sk_socket may have been killed while unlocked */ + if (!sk->sk_socket) + break; + clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); } -- 2.2.0.rc0.207.ga3a616c
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