linux-kernel - [PATCH] mm/damon: Adjust the size of kbuf array to avoid overflow

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Message-Id: <20211013114854.15705-1-xhao@linux.alibaba.com>
Date:   Wed, 13 Oct 2021 19:48:54 +0800
From:   Xin Hao <xhao@...ux.alibaba.com>
To:     sjpark@...zon.de
Cc:     xhao@...ux.alibaba.com, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mm/damon: Adjust the size of kbuf array to avoid overflow

In order to avoid the 'count' size space of kbuf array is
used up, but a "\0" is still added.

Signed-off-by: Xin Hao <xhao@...ux.alibaba.com>
---
 mm/damon/dbgfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/damon/dbgfs.c b/mm/damon/dbgfs.c
index faee070977d8..20c61eed54af 100644
--- a/mm/damon/dbgfs.c
+++ b/mm/damon/dbgfs.c
@@ -247,7 +247,7 @@ static ssize_t dbgfs_kdamond_pid_read(struct file *file,
 	char *kbuf;
 	ssize_t len;
 
-	kbuf = kmalloc(count, GFP_KERNEL);
+	kbuf = kmalloc(count + 1, GFP_KERNEL);
 	if (!kbuf)
 		return -ENOMEM;
 
-- 
2.31.0