The patch titled
Subject: ocfs2: fix locking for res->tracking and dlm->tracking_list
has been removed from the -mm tree. Its filename was
ocfs2-fix-locking-for-res-tracking-and-dlm-tracking_list.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Ashish Samant <ashish.samant@xxxxxxxxxx>
Subject: ocfs2: fix locking for res->tracking and dlm->tracking_list
In dlm_init_lockres() we access and modify res->tracking and
dlm->tracking_list without holding dlm->track_lock. This can cause list
corruptions and can end up in kernel panic.
Fix this by locking res->tracking and dlm->tracking_list with
dlm->track_lock instead of dlm->spinlock.
Link: http://lkml.kernel.org/r/1529951192-4686-1-git-send-email-ashish.samant@xxxxxxxxxx
Signed-off-by: Ashish Samant <ashish.samant@xxxxxxxxxx>
Reviewed-by: Changwei Ge <ge.changwei@xxxxxxx>
Acked-by: Joseph Qi <jiangqi903@xxxxxxxxx>
Acked-by: Jun Piao <piaojun@xxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Changwei Ge <ge.changwei@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/dlm/dlmmaster.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/ocfs2/dlm/dlmmaster.c~ocfs2-fix-locking-for-res-tracking-and-dlm-tracking_list
+++ a/fs/ocfs2/dlm/dlmmaster.c
@@ -584,9 +584,9 @@ static void dlm_init_lockres(struct dlm_
res->last_used = 0;
- spin_lock(&dlm->spinlock);
+ spin_lock(&dlm->track_lock);
list_add_tail(&res->tracking, &dlm->tracking_list);
- spin_unlock(&dlm->spinlock);
+ spin_unlock(&dlm->track_lock);
memset(res->lvb, 0, DLM_LVB_LEN);
memset(res->refmap, 0, sizeof(res->refmap));
_
Patches currently in -mm which might be from ashish.samant@xxxxxxxxxx are
