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Date: Thu, 17 Sep 2020 10:18:51 +0200 From: Paolo Abeni <pabeni@...hat.com> To: Ye Bin <yebin10@...wei.com>, mathew.j.martineau@...ux.intel.com, matthieu.baerts@...sares.net, mptcp@...ts.01.org, netdev@...r.kernel.org Cc: Hulk Robot <hulkci@...wei.com> Subject: Re: [PATCH v3] mptcp: Fix unsigned 'max_seq' compared with zero in mptcp_data_queue_ofo On Thu, 2020-09-17 at 09:12 +0800, Ye Bin wrote: > Fixes coccicheck warnig: > net/mptcp/protocol.c:164:11-18: WARNING: Unsigned expression compared with zero: max_seq > 0 > > Fixes: ab174ad8ef76 ("mptcp: move ooo skbs into msk out of order queue") > Reported-by: Hulk Robot <hulkci@...wei.com> > Signed-off-by: Ye Bin <yebin10@...wei.com> > --- > net/mptcp/protocol.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c > index ef0dd2f23482..386cd4e60250 100644 > --- a/net/mptcp/protocol.c > +++ b/net/mptcp/protocol.c > @@ -157,11 +157,12 @@ static void mptcp_data_queue_ofo(struct mptcp_sock *msk, struct sk_buff *skb) > struct rb_node **p, *parent; > u64 seq, end_seq, max_seq; > struct sk_buff *skb1; > + int space; > > seq = MPTCP_SKB_CB(skb)->map_seq; > end_seq = MPTCP_SKB_CB(skb)->end_seq; > - max_seq = tcp_space(sk); > - max_seq = max_seq > 0 ? max_seq + msk->ack_seq : msk->ack_seq; > + space = tcp_space(sk); > + max_seq = space > 0 ? space + msk->ack_seq : msk->ack_seq; > > pr_debug("msk=%p seq=%llx limit=%llx empty=%d", msk, seq, max_seq, > RB_EMPTY_ROOT(&msk->out_of_order_queue)); Thank you for addressing our feedback! Acked-by: Paolo Abeni <pabeni@...hat.com>
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