linux-kernel - [PATCH] clk: imx: Add check for kcalloc

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>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220310080257.1988412-1-jiasheng@iscas.ac.cn>
Date:   Thu, 10 Mar 2022 16:02:57 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     abel.vesa@....com, mturquette@...libre.com, sboyd@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com
Cc:     linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] clk: imx: Add check for kcalloc

As the potential failure of the kcalloc(),
it should be better to check it in order to
avoid the dereference of the NULL pointer.

Fixes: 379c9a24cc23 ("clk: imx: Fix reparenting of UARTs not associated with stdout")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/clk/imx/clk.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/clk/imx/clk.c b/drivers/clk/imx/clk.c
index 7cc669934253..99249ab361d2 100644
--- a/drivers/clk/imx/clk.c
+++ b/drivers/clk/imx/clk.c
@@ -173,6 +173,8 @@ void imx_register_uart_clocks(unsigned int clk_count)
 		int i;
 
 		imx_uart_clocks = kcalloc(clk_count, sizeof(struct clk *), GFP_KERNEL);
+		if (!imx_uart_clocks)
+			return;
 
 		if (!of_stdout)
 			return;
-- 
2.25.1