Unverified Commit 0512e86d authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!11295 padata: Fix possible divide-by-0 panic in padata_mt_helper() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Cheng Yu <serein.chengyu@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/VXSJVVUKHRCD25HONSTXPNTEVEAACMVT/ 
 
https://gitee.com/src-openeuler/kernel/issues/IAMM8G 
 
Link:https://gitee.com/openeuler/kernel/pulls/11295

 

Reviewed-by: default avatarZucheng Zheng <zhengzucheng@huawei.com>
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
parents da6dfc5d 066a788f

kernel/padata.c

+7 −0
Original line number Diff line number Diff line
@@ -521,6 +521,13 @@ void __init padata_do_multithreaded(struct padata_mt_job *job) 
	ps.chunk_size = max(ps.chunk_size, job->min_chunk);

	ps.chunk_size = roundup(ps.chunk_size, job->align);



	/*

	 * chunk_size can be 0 if the caller sets min_chunk to 0. So force it

	 * to at least 1 to prevent divide-by-0 panic in padata_mt_helper().`

	 */

	if (!ps.chunk_size)

		ps.chunk_size = 1U;



	list_for_each_entry(pw, &works, pw_list)

		queue_work(system_unbound_wq, &pw->pw_work);