Unverified Commit e442cdb8 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!14777 tracing: Prevent bad count for tracing_cpumask_write 

Merge Pull Request from: @ci-robot 
 
PR sync from: Luo Gengkun <luogengkun2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/CBLEE76L3QFPKLJVCL2TYTBYJVOWKGQX/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBG2PO 
 
Link:https://gitee.com/openeuler/kernel/pulls/14777

 

Reviewed-by: default avatarXu Kuohai <xukuohai@huawei.com>
Reviewed-by: default avatarLi Nan <linan122@huawei.com>
Signed-off-by: default avatarLi Nan <linan122@huawei.com>
parents c8fb5358 2d98f7a4

kernel/trace/trace.c

+3 −0
Original line number Diff line number Diff line
@@ -4869,6 +4869,9 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf, 
	cpumask_var_t tracing_cpumask_new;

	int err;



	if (count == 0 || count > KMALLOC_MAX_SIZE)

		return -EINVAL;



	if (!zalloc_cpumask_var(&tracing_cpumask_new, GFP_KERNEL))

		return -ENOMEM;