Unverified Commit ac333461 authored Dec 05, 2023 by openeuler-ci-bot Committed by Gitee Dec 05, 2023

!3103 [sync] PR-3082: fs/dirty_pages: add last read check in seq_read_dirty()

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/3082 
 
PR sync from: Zizhi Wo <wozizhi@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/Z2PGGVKB3BCZJYLGNVYDDEYL64T7UZJQ/ 
 
https://gitee.com/openeuler/kernel/issues/I8JUUC?from=project-issue 
 
Link:https://gitee.com/openeuler/kernel/pulls/3103

 

Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>

parents 2ff2495d 2be2e11f

fs/dirty_pages.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -218,6 +218,9 @@ static ssize_t seq_read_dirty(
	}		}

	n = min(m->count - m->from, size);		n = min(m->count - m->from, size);
			/* check if this is the last read */
			if (n == 0)
			goto done;
	n -= copy_to_user(buf, m->buf + m->from, n);		n -= copy_to_user(buf, m->buf + m->from, n);
	if (unlikely(!n)) {		if (unlikely(!n)) {
	err = -EFAULT;		err = -EFAULT;