diff options
| -rw-r--r-- | include/linux/thread_info.h | 2 | ||||
| -rw-r--r-- | kernel/fork.c | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index 2873baf5372a..cf87c162f4eb 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -59,7 +59,7 @@ extern long do_no_restart_syscall(struct restart_block *parm); #ifdef __KERNEL__ -#ifdef CONFIG_DEBUG_STACK_USAGE +#if IS_ENABLED(CONFIG_DEBUG_STACK_USAGE) || IS_ENABLED(CONFIG_DEBUG_KMEMLEAK) # define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK | \ __GFP_ZERO) #else diff --git a/kernel/fork.c b/kernel/fork.c index 70e10cb49be0..c19e6d48d57d 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -184,6 +184,10 @@ static unsigned long *alloc_thread_stack_node(struct task_struct *tsk, int node) continue; this_cpu_write(cached_stacks[i], NULL); +#ifdef CONFIG_DEBUG_KMEMLEAK + /* Clear stale pointers from reused stack. */ + memset(s->addr, 0, THREAD_SIZE); +#endif tsk->stack_vm_area = s; local_irq_enable(); return s->addr; |