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lockd: use rpc client's cl_nodename for id encoding

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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>
This commit is contained in:
Stanislav Kinsbursky 2012-09-18 13:37:18 +04:00 committed by Trond Myklebust
parent e9406db20f
commit 303a7ce920
1 changed files with 3 additions and 1 deletions
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4
fs/lockd/mon.c
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@ -42,6 +42,7 @@ struct nsm_args {
u32 proc;
char *mon_name;
char *nodename;
};
struct nsm_res {
@ -141,6 +142,7 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,
.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 @@ static void encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp)
{
__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);