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From: NeilBrown <neilb@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: nfs@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: [PATCH 001 of 9] knfsd: nfsd4: fix non-terminated string
Date: Tue, 13 Feb 2007 10:44:02 +1100	[thread overview]
Message-ID: <1070212234402.29224@suse.de> (raw)
In-Reply-To: <20070213103941.28958.patches@notabene>


From: J. Bruce Fields <bfields@citi.umich.edu>
The server name is expected to be a null-terminated string, so we can't
pass in the raw client identifier.

What's more, the client identifier is just a binary, not necessarily
printable, blob.  Let's just use the ip address instead.  The server
name appears to exist just to help debugging by making some printk's
more informative.

Note that the string is copies into the rpc client structure, so
the pointer to the local variable does not outlive the function call.

Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./fs/nfsd/nfs4callback.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff .prev/fs/nfsd/nfs4callback.c ./fs/nfsd/nfs4callback.c
--- .prev/fs/nfsd/nfs4callback.c	2007-02-13 09:50:26.000000000 +1100
+++ ./fs/nfsd/nfs4callback.c	2007-02-13 10:00:59.000000000 +1100
@@ -387,7 +387,6 @@ nfsd4_probe_callback(struct nfs4_client 
 		.address	= (struct sockaddr *)&addr,
 		.addrsize	= sizeof(addr),
 		.timeout	= &timeparms,
-		.servername	= clp->cl_name.data,
 		.program	= program,
 		.version	= nfs_cb_version[1]->number,
 		.authflavor	= RPC_AUTH_UNIX,	/* XXX: need AUTH_GSS... */
@@ -397,6 +396,7 @@ nfsd4_probe_callback(struct nfs4_client 
 		.rpc_proc       = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
 		.rpc_argp       = clp,
 	};
+	char clientname[16];
 	int status;
 
 	if (atomic_read(&cb->cb_set))
@@ -419,6 +419,11 @@ nfsd4_probe_callback(struct nfs4_client 
 	memset(program->stats, 0, sizeof(cb->cb_stat));
 	program->stats->program = program;
 
+	/* Just here to make some printk's more useful: */
+	snprintf(clientname, sizeof(clientname),
+		"%u.%u.%u.%u", NIPQUAD(addr.sin_addr));
+	args.servername = clientname;
+
 	/* Create RPC client */
 	cb->cb_client = rpc_create(&args);
 	if (IS_ERR(cb->cb_client)) {

  reply	other threads:[~2007-02-12 23:44 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-12 23:43 [PATCH 000 of 9] knfsd: NFSv4 ACL improvements and a couple of bug fixes NeilBrown
2007-02-12 23:44 ` NeilBrown [this message]
2007-02-14 13:00   ` [NFS] [PATCH 001 of 9] knfsd: nfsd4: fix non-terminated string Ming Zhang
2007-02-14 17:55     ` Chuck Lever
2007-02-14 18:04       ` Ming Zhang
2007-02-12 23:44 ` [PATCH 002 of 9] knfsd: nfsd4: relax checking of ACL inheritance bits NeilBrown
2007-02-12 23:44 ` [PATCH 003 of 9] knfsd: nfsd4: simplify nfsv4->posix translation NeilBrown
2007-02-12 23:44 ` [PATCH 004 of 9] knfsd: nfsd4: represent nfsv4 acl with array instead of linked list NeilBrown
2007-02-12 23:44 ` [PATCH 005 of 9] knfsd: nfsd4: fix memory leak on kmalloc failure in savemem NeilBrown
2007-02-12 23:44 ` [PATCH 006 of 9] knfsd: nfsd4: fix error return on unsupported acl NeilBrown
2007-02-12 23:44 ` [PATCH 007 of 9] knfsd: nfsd4: acls: don't return explicit mask NeilBrown
2007-02-12 23:45 ` [PATCH 008 of 9] knfsd: nfsd4: acls: avoid unnecessary denies NeilBrown
2007-02-12 23:45 ` [PATCH 009 of 9] knfsd: nfsd4: fix handling of directories without default ACLs NeilBrown

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