From nobody Sun Mar 22 09:49:27 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4CFFD3A0E93 for ; Tue, 17 Mar 2026 09:45:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773740707; cv=none; b=nNe8c2fK3bUWonlQ5nY3IdksQM+lXmUROblcVjhuBXHOARAkAkmFLnKF+teKi4nfxrU0C/fpta80HbfC9RjVE7auf5r7rvB79FB4Mn9TdVnHVqzFTJFM+MzjkEvLbzOQJ/LBI67yq5D9jgWDdf0JxWLIyv6H7+iGK3xTFfBuREQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773740707; c=relaxed/simple; bh=CYgVF5zY5Rvbg9CPg01AyrtZqoiA5aW2cHJoIC++TkM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DaQtqcep26Vj+V8UP959Qc159yUaKgrm0DMT5OZemqv48sEsVSVZROINDVszTf2cmhW5jPVCviYTSA8PKrbyRS0jCK3nMkfPfSD67QUpSjtX49smMkRoGNbO4HZkPbn3rCtjwdjrHJNQEWiPpo+Ma0NLnPvpmeDt8OPTLqfcG2I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=F8ju/BTW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="F8ju/BTW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B24BAC19425; Tue, 17 Mar 2026 09:45:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773740706; bh=CYgVF5zY5Rvbg9CPg01AyrtZqoiA5aW2cHJoIC++TkM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F8ju/BTW2A7MKi8CAJ6KanehdurXO3Y1i3a4/ZYi2361NA6g4ONebOMKwFCfBs/ZM 8q0X0+eQOwP+2ZKrMvyOcZASOCpaEH/wp7hAC/HQ2SU46mw6PJrvkIjqLdNTF7jq3k dDoYBmi/yuQmSOOMtcvr8IRSJ7cfoyxQKVq9hBySAXjHY9zfhHI7FGAZVz9VlB+o5L 2zCzqPmiRcM187Gjs0EskfB77dBmGxDLqtChLS3GWJ8FWnBWOFD0JhKO0qXHS3JYGb GrelT+i9UwBztZc9eOLP4Vt6Dffg72SLnI1FrAghuje8M9kYka6dAYp8XYbdlmeouO jt6mnh7fybmqQ== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Gang Yan , Geliang Tang Subject: [RESEND mptcp-next v2 1/2] mptcp: check desc->count in read_sock Date: Tue, 17 Mar 2026 17:44:54 +0800 Message-ID: X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Gang Yan In __tcp_read_sock(), it checks whether desc->count equals 0 within the loop and breaks the loop if true. This check should also be synchronized to __mptcp_read_sock(). Co-developed-by: Geliang Tang Signed-off-by: Geliang Tang Signed-off-by: Gang Yan --- net/mptcp/protocol.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index b5676b37f8f4..dc9fdd664871 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -4384,6 +4384,8 @@ static int __mptcp_read_sock(struct sock *sk, read_de= scriptor_t *desc, } =20 mptcp_eat_recv_skb(sk, skb); + if (!desc->count) + break; } =20 if (noack) --=20 2.53.0