| Message ID | 20250424071648.89016-1-bsdhenrymartin@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v1] watchdog: lenovo_se30_wdt: Fix null-ptr-deref in lenovo_se30_wdt_probe() | expand |
diff --git a/drivers/watchdog/lenovo_se30_wdt.c b/drivers/watchdog/lenovo_se30_wdt.c index 024b842499b3..1c73bb7eeeee 100644 --- a/drivers/watchdog/lenovo_se30_wdt.c +++ b/drivers/watchdog/lenovo_se30_wdt.c @@ -271,6 +271,8 @@ static int lenovo_se30_wdt_probe(struct platform_device *pdev) return -EBUSY; priv->shm_base_addr = devm_ioremap(dev, base_phys, SHM_WIN_SIZE); + if (!priv->shm_base_addr) + return -ENOMEM; priv->wdt_cfg.mod = WDT_MODULE; priv->wdt_cfg.idx = WDT_CFG_INDEX;
devm_ioremap() returns NULL on error. Currently, lenovo_se30_wdt_probe() does not check for this case, which results in a NULL pointer dereference. Add NULL check after devm_ioremap() to prevent this issue. Fixes: c284153a2c55 ("watchdog: lenovo_se30_wdt: Watchdog driver for Lenovo SE30 platform") Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com> --- drivers/watchdog/lenovo_se30_wdt.c | 2 ++ 1 file changed, 2 insertions(+)