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From b29b3a215b9cbec20ea633e6a861accfc48b59bb Mon Sep 17 00:00:00 2001
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From: Phil Sutter <phil@nwl.cc>
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Date: Sat, 9 May 2020 13:36:49 +0200
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Subject: [PATCH] nfnl_osf: Fix broken conversion to nfnl_query()
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Due to missing NLM_F_ACK flag in request, nfnetlink code in kernel
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didn't create an own ACK message but left it upon subsystem to ACK or
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not. Since nfnetlink_osf doesn't ACK by itself, nfnl_query() got stuck
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waiting for a reply.
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Whoever did the conversion from deprecated nfnl_talk() obviously didn't
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even test basic functionality of the tool.
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Fixes: 52aa15098ebd6 ("nfnl_osf: Replace deprecated nfnl_talk() by nfnl_query()")
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Signed-off-by: Phil Sutter <phil@nwl.cc>
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(cherry picked from commit c8332553caf48132403895bae750b3cd09a2efd8)
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Signed-off-by: Phil Sutter <psutter@redhat.com>
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---
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utils/nfnl_osf.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/utils/nfnl_osf.c b/utils/nfnl_osf.c
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index 15d531975e11d..922d90ac135b7 100644
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--- a/utils/nfnl_osf.c
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+++ b/utils/nfnl_osf.c
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@@ -378,9 +378,11 @@ static int osf_load_line(char *buffer, int len, int del)
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memset(buf, 0, sizeof(buf));
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if (del)
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- nfnl_fill_hdr(nfnlssh, nmh, 0, AF_UNSPEC, 0, OSF_MSG_REMOVE, NLM_F_REQUEST);
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+ nfnl_fill_hdr(nfnlssh, nmh, 0, AF_UNSPEC, 0, OSF_MSG_REMOVE,
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+ NLM_F_ACK | NLM_F_REQUEST);
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else
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- nfnl_fill_hdr(nfnlssh, nmh, 0, AF_UNSPEC, 0, OSF_MSG_ADD, NLM_F_REQUEST | NLM_F_CREATE);
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+ nfnl_fill_hdr(nfnlssh, nmh, 0, AF_UNSPEC, 0, OSF_MSG_ADD,
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+ NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE);
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nfnl_addattr_l(nmh, sizeof(buf), OSF_ATTR_FINGER, &f, sizeof(struct xt_osf_user_finger));
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--
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2.26.2
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