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drivers: watchdog: exar_wdt.c fix use after free

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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>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20221013095258.1424967-1-pmanank200502@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Manank Patel 2022-10-13 15:22:58 +05:30 committed by Wim Van Sebroeck
parent 097a4a1612
commit 82ebbe65d7
1 changed files with 3 additions and 1 deletions
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4
drivers/watchdog/exar_wdt.c
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@ -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);