From: Tzung-Bi Shih <tzungbi@kernel.org>
To: Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>
Cc: Daniel Palmer <daniel@thingy.jp>,
Romain Perier <romain.perier@gmail.com>,
linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org,
tzungbi@kernel.org
Subject: [PATCH v2 1/9] watchdog: msc313e: Fix NULL pointer dereference in PM callbacks
Date: Sat, 29 Aug 2026 00:13:40 +0800 [thread overview]
Message-ID: <20260828161348.13212-2-tzungbi@kernel.org> (raw)
In-Reply-To: <20260828161348.13212-1-tzungbi@kernel.org>
msc313e_wdt_probe() doesn't set the driver data for the platform device.
As a result, dev_get_drvdata() in msc313e_wdt_suspend() and
msc313e_wdt_resume() will return NULL, leading to a NULL pointer
dereference afterward.
Set the platform device driver data in msc313e_wdt_probe().
Fixes: e9800b799464 ("watchdog: Add Mstar MSC313e WDT driver")
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
---
v2:
- No changes.
v1: https://lore.kernel.org/all/20260827044700.554333-2-tzungbi@kernel.org
---
drivers/watchdog/msc313e_wdt.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/watchdog/msc313e_wdt.c b/drivers/watchdog/msc313e_wdt.c
index d962589e2c55..f69d66971c41 100644
--- a/drivers/watchdog/msc313e_wdt.c
+++ b/drivers/watchdog/msc313e_wdt.c
@@ -124,6 +124,7 @@ static int msc313e_wdt_probe(struct platform_device *pdev)
set_bit(WDOG_HW_RUNNING, &priv->wdev.status);
watchdog_set_drvdata(&priv->wdev, priv);
+ platform_set_drvdata(pdev, priv);
watchdog_init_timeout(&priv->wdev, timeout, dev);
watchdog_stop_on_reboot(&priv->wdev);
--
2.53.0
next prev parent reply other threads:[~2026-08-28 16:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-28 16:13 [PATCH v2 0/9] watchdog: msc313e: Fix issues Sashiko reported Tzung-Bi Shih
2026-08-28 16:13 ` Tzung-Bi Shih [this message]
2026-08-28 16:13 ` [PATCH v2 2/9] watchdog: msc313e: Avoid division by zero Tzung-Bi Shih
2026-08-28 16:13 ` [PATCH v2 3/9] watchdog: msc313e: Fix clock leak and spurious timer in settimeout() Tzung-Bi Shih
2026-08-28 16:13 ` [PATCH v2 4/9] watchdog: msc313e: Enable clock before accessing hardware registers Tzung-Bi Shih
2026-08-28 16:13 ` [PATCH v2 5/9] watchdog: msc313e: Fix spurious reset on suspend Tzung-Bi Shih
2026-08-28 16:13 ` [PATCH v2 6/9] watchdog: msc313e: Fix undefined behavior Tzung-Bi Shih
2026-08-28 16:13 ` [PATCH v2 7/9] watchdog: msc313e: Sync timeout value if WDT was running at boot Tzung-Bi Shih
2026-08-28 16:13 ` [PATCH v2 8/9] watchdog: msc313e: Propagate error code in resume() Tzung-Bi Shih
2026-08-28 16:13 ` [PATCH v2 9/9] watchdog: msc313e: Replace commas with semicolons in probe() Tzung-Bi Shih
2026-08-28 16:20 ` [PATCH v2 0/9] watchdog: msc313e: Fix issues Sashiko reported Daniel Palmer
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