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From dbc597c9d1e0e65cc9d989d8057f9a083c2f5779 Mon Sep 17 00:00:00 2001
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From: Phil Sutter <psutter@redhat.com>
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Date: Fri, 15 Dec 2017 16:13:46 +0100
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Subject: [PATCH] tc: fix command "tc actions del" hang issue
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1526394
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Upstream Status: iproute2.git commit 83cf5bc73b858
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commit 83cf5bc73b858608d59c3c6126a9f37e793e15dd
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Author: Chris Mi <chrism@mellanox.com>
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Date: Thu Dec 14 18:09:00 2017 +0900
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tc: fix command "tc actions del" hang issue
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If command is RTM_DELACTION, a non-NULL pointer is passed to rtnl_talk().
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Then flag NLM_F_ACK is not set on n->nlmsg_flags and netlink_ack() will
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not be called. Command tc will wait for the reply for ever.
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Fixes: 86bf43c7c2fd ("lib/libnetlink: update rtnl_talk to support malloc buff at run time")
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Reviewed-by: Jiri Pirko <jiri@mellanox.com>
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Signed-off-by: Chris Mi <chrism@mellanox.com>
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Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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---
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tc/m_action.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/tc/m_action.c b/tc/m_action.c
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index 90b2a11..7cfd9e0 100644
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--- a/tc/m_action.c
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+++ b/tc/m_action.c
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@@ -507,7 +507,7 @@ static int tc_action_gd(int cmd, unsigned int flags, int *argc_p, char ***argv_p
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req.n.nlmsg_seq = rth.dump = ++rth.seq;
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- if (rtnl_talk(&rth, &req.n, &ans) < 0) {
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+ if (rtnl_talk(&rth, &req.n, cmd == RTM_DELACTION ? NULL : &ans) < 0) {
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fprintf(stderr, "We have an error talking to the kernel\n");
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return 1;
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}
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--
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1.8.3.1
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