3.10-stable review patch. If anyone has any objections, please let me know.
------------------ From: Daniel Borkmann <dbork...@redhat.com> [ Upstream commit a0fb05d1aef0f5df936f80b726d1b3bfd4275f95 ] If we do not add braces around ... mask |= POLLERR | sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0; ... then this condition always evaluates to true as POLLERR is defined as 8 and binary or'd with whatever result comes out of sock_flag(). Hence instead of (X | Y) ? A : B, transform it into X | (Y ? A : B). Unfortunatelty, commit 8facd5fb73 ("net: fix smatch warnings inside datagram_poll") forgot about SCTP. :-( Introduced by 7d4c04fc170 ("net: add option to enable error queue packets waking select"). Signed-off-by: Daniel Borkmann <dbork...@redhat.com> Cc: Jacob Keller <jacob.e.kel...@intel.com> Acked-by: Neil Horman <nhor...@tuxdriver.com> Acked-by: Vlad Yasevich <vyasev...@gmail.com> Acked-by: Jacob Keller <jacob.e.kel...@intel.com> Signed-off-by: David S. Miller <da...@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- net/sctp/socket.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -6193,7 +6193,7 @@ unsigned int sctp_poll(struct file *file /* Is there any exceptional events? */ if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) mask |= POLLERR | - sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0; + (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? POLLPRI : 0); if (sk->sk_shutdown & RCV_SHUTDOWN) mask |= POLLRDHUP | POLLIN | POLLRDNORM; if (sk->sk_shutdown == SHUTDOWN_MASK) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/