Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

watchdog: lenovo_se30_wdt: Fix possible devm_ioremap() NULL pointer dereference in lenovo_se30_wdt_probe() 

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: c284153a2c ("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>
This commit is contained in:
Henry Martin 2025-04-24 15:16:48 +08:00 committed by Wim Van Sebroeck
parent 53663d2cab
commit a4e2401438
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/watchdog/lenovo_se30_wdt.c
View File

@ -271,6 +271,8 @@ static int lenovo_se30_wdt_probe(struct platform_device *pdev)
return -EBUSY; return -EBUSY;
priv->shm_base_addr = devm_ioremap(dev, base_phys, SHM_WIN_SIZE); 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.mod = WDT_MODULE;
priv->wdt_cfg.idx = WDT_CFG_INDEX; priv->wdt_cfg.idx = WDT_CFG_INDEX;