lockd: use rpc client's cl_nodename for id encoding
Taking hostname from uts namespace if not safe, because this cuold be
performind during umount operation on child reaper death. And in this case
current->nsproxy is NULL already.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 38f240e..e0bc36e 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -42,6 +42,7 @@
u32 proc;
char *mon_name;
+ char *nodename;
};
struct nsm_res {
@@ -141,6 +142,7 @@
.vers = 3,
.proc = NLMPROC_NSM_NOTIFY,
.mon_name = nsm->sm_mon_name,
+ .nodename = utsname()->nodename,
};
struct rpc_message msg = {
.rpc_argp = &args,
@@ -477,7 +479,7 @@
{
__be32 *p;
- encode_nsm_string(xdr, utsname()->nodename);
+ encode_nsm_string(xdr, argp->nodename);
p = xdr_reserve_space(xdr, 4 + 4 + 4);
*p++ = cpu_to_be32(argp->prog);
*p++ = cpu_to_be32(argp->vers);