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[DLM] Telnet to port 21064 can stop all lockspaces

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This patch fixes Red Hat bz#245892

Opening a tcp connection from a cluster member to another cluster member
targeting the dlm port it is enough to stop every dlm operation in the cluster.
This means that GFS and rgmanager will hang.

Signed-Off-By: Patrick Caulfield <pcaulfie@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Patrick Caulfield 2007-06-27 11:36:23 +01:00 committed by Steven Whitehouse
parent 1875f2f31b
commit 97d848365e
1 changed files with 10 additions and 4 deletions
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14
fs/dlm/lowcomms.c
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@ -720,11 +720,17 @@ static int tcp_accept_from_sock(struct connection *con)
INIT_WORK(&othercon->rwork, process_recv_sockets); INIT_WORK(&othercon->rwork, process_recv_sockets);
set_bit(CF_IS_OTHERCON, &othercon->flags); set_bit(CF_IS_OTHERCON, &othercon->flags);
newcon->othercon = othercon; newcon->othercon = othercon;
othercon->sock = newsock;
newsock->sk->sk_user_data = othercon;
add_sock(newsock, othercon);
addcon = othercon;
}
else {
printk("Extra connection from node %d attempted\n", nodeid);
result = -EAGAIN;
up_write(&newcon->sock_sem);
goto accept_err;
} }
othercon->sock = newsock;
newsock->sk->sk_user_data = othercon;
add_sock(newsock, othercon);
addcon = othercon;
} }
else { else {
newsock->sk->sk_user_data = newcon; newsock->sk->sk_user_data = newcon;