diff options
Diffstat (limited to 'mm/kasan/kasan.c')
| -rw-r--r-- | mm/kasan/kasan.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c index 0e9505f66ec1..b2a0cff2bb35 100644 --- a/mm/kasan/kasan.c +++ b/mm/kasan/kasan.c @@ -80,7 +80,14 @@ void kasan_unpoison_task_stack(struct task_struct *task) /* Unpoison the stack for the current task beyond a watermark sp value. */ asmlinkage void kasan_unpoison_task_stack_below(const void *watermark) { - __kasan_unpoison_stack(current, watermark); + /* + * Calculate the task stack base address. Avoid using 'current' + * because this function is called by early resume code which hasn't + * yet set up the percpu register (%gs). + */ + void *base = (void *)((unsigned long)watermark & ~(THREAD_SIZE - 1)); + + kasan_unpoison_shadow(base, watermark - base); } /* |