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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Steve French <stfrench@microsoft.com>,
        Ronnie Sahlberg <lsahlber@redhat.com>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
        Sasha Levin <sashal@kernel.org>, linux-cifs@vger.kernel.org,
        samba-technical@lists.samba.org
Subject: [PATCH AUTOSEL 4.9 177/251] cifs: fix rmmod regression in cifs.ko caused by force_sig changes
Date:   Thu, 16 Jan 2020 12:35:26 -0500
Message-Id: <20200116173641.22137-137-sashal@kernel.org>
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From: Steve French <stfrench@microsoft.com>

[ Upstream commit 247bc9470b1eeefc7b58cdf2c39f2866ba651509 ]

Fixes: 72abe3bcf091 ("signal/cifs: Fix cifs_put_tcp_session to call send_sig instead of force_sig")

The global change from force_sig caused module unloading of cifs.ko
to fail (since the cifsd process could not be killed, "rmmod cifs"
now would always fail)

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/cifs/connect.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 110febd69737..7d46025d5e89 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -885,6 +885,7 @@ cifs_demultiplex_thread(void *p)
 		mempool_resize(cifs_req_poolp, length + cifs_min_rcv);
 
 	set_freezable();
+	allow_signal(SIGKILL);
 	while (server->tcpStatus != CifsExiting) {
 		if (try_to_freeze())
 			continue;
-- 
2.20.1