From 302c04110f0ce70d25add2496b521132548cd408 Mon Sep 17 00:00:00 2001 From: Ma Ke Date: Sat, 20 Sep 2025 20:53:12 +0800 Subject: [PATCH] sparc: fix error handling in scan_one_device() Once of_device_register() failed, we should call put_device() to decrement reference count for cleanup. Or it could cause memory leak. So fix this by calling put_device(), then the name can be freed in kobject_cleanup(). Calling path: of_device_register() -> of_device_add() -> device_add(). As comment of device_add() says, 'if device_add() succeeds, you should call device_del() when you want to get rid of it. If device_add() has not succeeded, use only put_device() to drop the reference count'. Found by code review. Cc: stable@vger.kernel.org Fixes: cf44bbc26cf1 ("[SPARC]: Beginnings of generic of_device framework.") Signed-off-by: Ma Ke Reviewed-by: Andreas Larsson Signed-off-by: Andreas Larsson --- arch/sparc/kernel/of_device_32.c | 1 + arch/sparc/kernel/of_device_64.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c index 06012e68bdca..284a4cafa432 100644 --- a/arch/sparc/kernel/of_device_32.c +++ b/arch/sparc/kernel/of_device_32.c @@ -387,6 +387,7 @@ static struct platform_device * __init scan_one_device(struct device_node *dp, if (of_device_register(op)) { printk("%pOF: Could not register of device.\n", dp); + put_device(&op->dev); kfree(op); op = NULL; } diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c index f98c2901f335..f53092b07b9e 100644 --- a/arch/sparc/kernel/of_device_64.c +++ b/arch/sparc/kernel/of_device_64.c @@ -677,6 +677,7 @@ static struct platform_device * __init scan_one_device(struct device_node *dp, if (of_device_register(op)) { printk("%pOF: Could not register of device.\n", dp); + put_device(&op->dev); kfree(op); op = NULL; } -- 2.47.3