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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: phil@nwl.cc, fw@strlen.de
Subject: [PATCH iptables 6/6] nft: reset netlink sender buffer size of socket restart
Date: Mon, 20 May 2019 21:08:22 +0200	[thread overview]
Message-ID: <20190520190822.18873-7-pablo@netfilter.org> (raw)
In-Reply-To: <20190520190822.18873-1-pablo@netfilter.org>

Otherwise, mnl_set_sndbuffer() skips the buffer update after socket
restart. Then, sendmsg() fails with EMSGSIZE later on when sending the
batch to the kernel.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 iptables/nft.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/iptables/nft.c b/iptables/nft.c
index 9a3e9fdf4f12..2c61521455de 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -794,6 +794,7 @@ static int nft_restart(struct nft_handle *h)
 		return -1;
 
 	h->portid = mnl_socket_get_portid(h->nl);
+	nlbuffsiz = 0;
 
 	return 0;
 }
-- 
2.11.0


      parent reply	other threads:[~2019-05-20 19:08 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-20 19:08 [PATCH iptables 0/6] ERESTART fixes Pablo Neira Ayuso
2019-05-20 19:08 ` [PATCH iptables 1/6] nft: keep original cache in case of ERESTART Pablo Neira Ayuso
2019-05-20 19:08 ` [PATCH iptables 2/6] xtables: Fix for explicit rule flushes Pablo Neira Ayuso
2019-05-20 19:08 ` [PATCH iptables 3/6] nft: don't skip table addition from ERESTART Pablo Neira Ayuso
2019-05-20 19:08 ` [PATCH iptables 4/6] nft: don't care about previous state in ERESTART Pablo Neira Ayuso
2019-05-20 19:08 ` [PATCH iptables 5/6] nft: do not retry on EINTR Pablo Neira Ayuso
2019-05-20 19:08 ` Pablo Neira Ayuso [this message]

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