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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-20 13:44:41 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-20 13:44:41 -0500 |
| commit | 4c060b531006e0711db32a132d6ac7661594b280 (patch) | |
| tree | 899f281dfec3da7e29ede2e76019b3861116714f /fs/lockd/clntproc.c | |
| parent | 26bcbf965f857c710adafd16cf424f043006b5dd (diff) | |
| download | linux-4c060b531006e0711db32a132d6ac7661594b280.tar.gz linux-4c060b531006e0711db32a132d6ac7661594b280.tar.bz2 linux-4c060b531006e0711db32a132d6ac7661594b280.zip | |
lockd: Fix Oopses due to list manipulation errors.
The patch "stop abusing file_lock_list introduces a couple of bugs since
the locks may be copied and need to be removed from the lists when they are
destroyed.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/lockd/clntproc.c')
| -rw-r--r-- | fs/lockd/clntproc.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c index cb469431bd1d..3e90356b4882 100644 --- a/fs/lockd/clntproc.c +++ b/fs/lockd/clntproc.c @@ -446,12 +446,14 @@ nlmclnt_test(struct nlm_rqst *req, struct file_lock *fl) static void nlmclnt_locks_copy_lock(struct file_lock *new, struct file_lock *fl) { - memcpy(&new->fl_u.nfs_fl, &fl->fl_u.nfs_fl, sizeof(new->fl_u.nfs_fl)); - nlm_get_lockowner(new->fl_u.nfs_fl.owner); + new->fl_u.nfs_fl.state = fl->fl_u.nfs_fl.state; + new->fl_u.nfs_fl.owner = nlm_get_lockowner(fl->fl_u.nfs_fl.owner); + list_add_tail(&new->fl_u.nfs_fl.list, &fl->fl_u.nfs_fl.owner->host->h_granted); } static void nlmclnt_locks_release_private(struct file_lock *fl) { + list_del(&fl->fl_u.nfs_fl.list); nlm_put_lockowner(fl->fl_u.nfs_fl.owner); fl->fl_ops = NULL; } @@ -466,6 +468,7 @@ static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *ho BUG_ON(fl->fl_ops != NULL); fl->fl_u.nfs_fl.state = 0; fl->fl_u.nfs_fl.owner = nlm_find_lockowner(host, fl->fl_owner); + INIT_LIST_HEAD(&fl->fl_u.nfs_fl.list); fl->fl_ops = &nlmclnt_lock_ops; } @@ -552,7 +555,7 @@ nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl) if (resp->status == NLM_LCK_GRANTED) { fl->fl_u.nfs_fl.state = host->h_state; fl->fl_flags |= FL_SLEEP; - list_add_tail(&fl->fl_u.nfs_fl.list, &host->h_granted); + /* Ensure the resulting lock will get added to granted list */ do_vfs_lock(fl); } status = nlm_stat_to_errno(resp->status); @@ -619,12 +622,6 @@ nlmclnt_unlock(struct nlm_rqst *req, struct file_lock *fl) int status; /* - * Remove from the granted list now so the lock doesn't get - * reclaimed while we're stuck in the unlock call. - */ - list_del(&fl->fl_u.nfs_fl.list); - - /* * Note: the server is supposed to either grant us the unlock * request, or to deny it with NLM_LCK_DENIED_GRACE_PERIOD. In either * case, we want to unlock. |