Commit 28f6e487 authored Dec 08, 2022 by Zheng Zucheng Committed by Zheng Zengkai Dec 08, 2022

fork: Fixed the extended kabi memory is not initialized

hulk inclusion
category: bugfix
bugzilla: 18808I3, https://gitee.com/openeuler/kernel/issues/I648XI


CVE: NA

-------------------------------

If the extended kabi memory is not initialized, maybe has security risks.
Therefore, the extended kabi memory is initialized to NULL in fork process
and initialized by users as required.

Fixes: 5efc447b ("fork: Allocate a new task_struct_resvd object for fork task")
Signed-off-by: Zheng Zucheng <zhengzucheng@huawei.com>
Reviewed-by: Zhang Qiao <zhangqiao22@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>

parent a3a6ee2e

kernel/fork.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -856,7 +856,7 @@ void set_task_stack_end_magic(struct task_struct *tsk)
		static bool dup_resvd_task_struct(struct task_struct *dst,
		struct task_struct *orig, int node)
		{
		dst->_resvd = kmalloc_node(sizeof(struct task_struct_resvd),
		dst->_resvd = kzalloc_node(sizeof(struct task_struct_resvd),
		GFP_KERNEL, node);
		if (!dst->_resvd)
		return false;