linux-kernel - [PATCH] tools/io_uring: Fix missing check for return value of malloc()

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20230615125350.125557-1-cymi20@fudan.edu.cn>
Date:   Thu, 15 Jun 2023 05:53:50 -0700
From:   Chenyuan Mi <cymi20@...an.edu.cn>
To:     axboe@...nel.dk
Cc:     sml.silence@...il.com, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, Chenyuan Mi <cymi20@...an.edu.cn>
Subject: [PATCH] tools/io_uring: Fix missing check for return value of malloc()

The malloc() function may return NULL when it fails,
which may cause null pointer deference. Add Null 
check for return value of malloc().

Found by our static analysis tool.

Signed-off-by: Chenyuan Mi <cymi20@...an.edu.cn>
---
 tools/io_uring/io_uring-bench.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/io_uring/io_uring-bench.c b/tools/io_uring/io_uring-bench.c
index 7703f0118385..a7fedfdb9b84 100644
--- a/tools/io_uring/io_uring-bench.c
+++ b/tools/io_uring/io_uring-bench.c
@@ -560,6 +560,11 @@ int main(int argc, char *argv[])
 	pthread_create(&s->thread, NULL, submitter_fn, s);
 
 	fdepths = malloc(8 * s->nr_files);
+	if (!fdepths) {
+		printf("malloc failed");
+		return 1;
+	}
+
 	reap = calls = done = 0;
 	do {
 		unsigned long this_done = 0;
-- 
2.17.1