From cbe355f57c8074bc4f452e5b6e35509044c6fa23 Mon Sep 17 00:00:00 2001 From: Ashish Samant Date: Fri, 5 Oct 2018 15:52:15 -0700 Subject: [PATCH] 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@oracle.com Signed-off-by: Ashish Samant Reviewed-by: Changwei Ge Acked-by: Joseph Qi Acked-by: Jun Piao Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- fs/ocfs2/dlm/dlmmaster.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c index aaca0949fe53..826f0567ec43 100644 --- a/fs/ocfs2/dlm/dlmmaster.c +++ b/fs/ocfs2/dlm/dlmmaster.c @@ -584,9 +584,9 @@ static void dlm_init_lockres(struct dlm_ctxt *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)); -- 2.30.2