From e3f70eadb7dddfb5a2bb9afff7abfc6ee17a29d0 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Thu, 29 Mar 2012 18:54:33 +0400 Subject: Lockd: pass network namespace to creation and destruction routines v2: dereference of most probably already released nlm_host removed in nlmclnt_done() and reclaimer(). These routines are called from locks reclaimer() kernel thread. This thread works in "init_net" network context and currently relays on persence on lockd thread and it's per-net resources. Thus lockd_up() and lockd_down() can't relay on current network context. So let's pass corrent one into them. Signed-off-by: Stanislav Kinsbursky Signed-off-by: J. Bruce Fields --- fs/lockd/clntlock.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'fs/lockd/clntlock.c') diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c index ba1dc2eebd1e..ca0a08001449 100644 --- a/fs/lockd/clntlock.c +++ b/fs/lockd/clntlock.c @@ -56,7 +56,7 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init) u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4; int status; - status = lockd_up(); + status = lockd_up(nlm_init->net); if (status < 0) return ERR_PTR(status); @@ -65,7 +65,7 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init) nlm_init->hostname, nlm_init->noresvport, nlm_init->net); if (host == NULL) { - lockd_down(); + lockd_down(nlm_init->net); return ERR_PTR(-ENOLCK); } @@ -80,8 +80,10 @@ EXPORT_SYMBOL_GPL(nlmclnt_init); */ void nlmclnt_done(struct nlm_host *host) { + struct net *net = host->net; + nlmclnt_release_host(host); - lockd_down(); + lockd_down(net); } EXPORT_SYMBOL_GPL(nlmclnt_done); @@ -220,11 +222,12 @@ reclaimer(void *ptr) struct nlm_wait *block; struct file_lock *fl, *next; u32 nsmstate; + struct net *net = host->net; allow_signal(SIGKILL); down_write(&host->h_rwsem); - lockd_up(); /* note: this cannot fail as lockd is already running */ + lockd_up(net); /* note: this cannot fail as lockd is already running */ dprintk("lockd: reclaiming locks for host %s\n", host->h_name); @@ -275,6 +278,6 @@ restart: /* Release host handle after use */ nlmclnt_release_host(host); - lockd_down(); + lockd_down(net); return 0; } -- cgit v1.2.3