6.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Henry Martin bsdhenrymartin@gmail.com
[ Upstream commit a4e2401438a26131ecff9be6a3a1d4cbfea66f9a ]
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 Reviewed-by: Guenter Roeck linux@roeck-us.net Link: https://lore.kernel.org/r/20250424071648.89016-1-bsdhenrymartin@gmail.com Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Wim Van Sebroeck wim@linux-watchdog.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/watchdog/lenovo_se30_wdt.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/watchdog/lenovo_se30_wdt.c b/drivers/watchdog/lenovo_se30_wdt.c index 024b842499b36..1c73bb7eeeeed 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;