linux-kernel - [PATCH] tools/vm/page_owner_sort.c: Fix the potential stack overflow risk

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Message-Id: <20210506131402.10416-1-tangbin@cmss.chinamobile.com>
Date:   Thu,  6 May 2021 21:14:02 +0800
From:   Tang Bin <tangbin@...s.chinamobile.com>
To:     akpm@...ux-foundation.org, ch0.han@....com
Cc:     linux-kernel@...r.kernel.org,
        Tang Bin <tangbin@...s.chinamobile.com>,
        Zhang Shengju <zhangshengju@...s.chinamobile.com>
Subject: [PATCH] tools/vm/page_owner_sort.c: Fix the potential stack overflow risk

Add judgment to fix the potential stack overflow risk

Signed-off-by: Zhang Shengju <zhangshengju@...s.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
---
 tools/vm/page_owner_sort.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
index 85eb65ea1..bb7c35b77 100644
--- a/tools/vm/page_owner_sort.c
+++ b/tools/vm/page_owner_sort.c
@@ -132,6 +132,10 @@ int main(int argc, char **argv)
 	qsort(list, list_size, sizeof(list[0]), compare_txt);
 
 	list2 = malloc(sizeof(*list) * list_size);
+	if (!list2) {
+		printf("Out of memory\n");
+		exit(1);
+	}
 
 	printf("culling\n");
 
-- 
2.20.1.windows.1