lockd: Don't expose the process pid to the NLM server

Instead we use the nlm_lockowner->pid.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index da6354baa0b8..8ae79ae4b998 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -125,7 +125,15 @@ u32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock)
         list_for_each_entry(block, &nlm_blocked, b_list) {
                 struct file_lock *fl_blocked = block->b_lock;
 
-                if (!nlm_compare_locks(fl_blocked, fl))
+                if (fl_blocked->fl_start != fl->fl_start)
+                        continue;
+                if (fl_blocked->fl_end != fl->fl_end)
+                        continue;
+                /*
+                 * Careful! The NLM server will return the 32-bit "pid" that
+                 * we put on the wire: in this case the lockowner "pid".
+                 */
+                if (fl_blocked->fl_u.nfs_fl.owner->pid != lock->svid)
                         continue;
                 if (!nlm_cmp_addr(&block->b_host->h_addr, addr))
                         continue;