From: Manank Patel <pmanank200502@gmail.com>
To: linux@roeck-us.net
Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org,
Manank Patel <pmanank200502@gmail.com>
Subject: [PATCH] drivers: watchdog: exar_wdt.c fix use after free
Date: Thu, 13 Oct 2022 15:24:39 +0530 [thread overview]
Message-ID: <20221013095439.1425108-1-pmanank200502@gmail.com> (raw)
fix use after free by storing the result of PTR_ERR(n->pdev)
to a local variable before returning.
Signed-off-by: Manank Patel <pmanank200502@gmail.com>
---
drivers/watchdog/exar_wdt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/exar_wdt.c b/drivers/watchdog/exar_wdt.c
index 35058d8b21bc..7c61ff343271 100644
--- a/drivers/watchdog/exar_wdt.c
+++ b/drivers/watchdog/exar_wdt.c
@@ -355,8 +355,10 @@ static int __init exar_wdt_register(struct wdt_priv *priv, const int idx)
&priv->wdt_res, 1,
priv, sizeof(*priv));
if (IS_ERR(n->pdev)) {
+ int err = PTR_ERR(n->pdev);
+
kfree(n);
- return PTR_ERR(n->pdev);
+ return err;
}
list_add_tail(&n->list, &pdev_list);
--
2.38.0
next reply other threads:[~2022-10-13 9:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-13 9:54 Manank Patel [this message]
2022-10-13 13:53 ` Guenter Roeck
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