diff options
| -rw-r--r-- | arch/s390/mm/fault.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index a9c11aa57450..72cec9ecd96c 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -584,6 +584,8 @@ static void pfault_interrupt(struct ext_code ext_code, } } else { /* signal bit not set -> a real page is missing. */ + if (WARN_ON_ONCE(tsk != current)) + goto out; if (tsk->thread.pfault_wait == 1) { /* Already on the list with a reference: put to sleep */ __set_task_state(tsk, TASK_UNINTERRUPTIBLE); @@ -606,6 +608,7 @@ static void pfault_interrupt(struct ext_code ext_code, set_tsk_need_resched(tsk); } } +out: spin_unlock(&pfault_lock); put_task_struct(tsk); } |