The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 9322d1915f9d976ee48c09d800fbd5169bc2ddcc # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025012050-motor-prevalent-e802@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9322d1915f9d976ee48c09d800fbd5169bc2ddcc Mon Sep 17 00:00:00 2001 From: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp Date: Sun, 15 Dec 2024 12:39:45 +0900 Subject: [PATCH] irqchip: Plug a OF node reference leak in platform_irqchip_probe()
platform_irqchip_probe() leaks a OF node when irq_init_cb() fails. Fix it by declaring par_np with the __free(device_node) cleanup construct.
This bug was found by an experimental static analysis tool that I am developing.
Fixes: f8410e626569 ("irqchip: Add IRQCHIP_PLATFORM_DRIVER_BEGIN/END and IRQCHIP_MATCH helper macros") Signed-off-by: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20241215033945.3414223-1-joe@pf.is.s.u-tokyo.ac....
diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c index 1eeb0d0156ce..0ee7b6b71f5f 100644 --- a/drivers/irqchip/irqchip.c +++ b/drivers/irqchip/irqchip.c @@ -35,11 +35,10 @@ void __init irqchip_init(void) int platform_irqchip_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; - struct device_node *par_np = of_irq_find_parent(np); + struct device_node *par_np __free(device_node) = of_irq_find_parent(np); of_irq_init_cb_t irq_init_cb = of_device_get_match_data(&pdev->dev);
if (!irq_init_cb) { - of_node_put(par_np); return -EINVAL; }
@@ -55,7 +54,6 @@ int platform_irqchip_probe(struct platform_device *pdev) * interrupt controller can check for specific domains as necessary. */ if (par_np && !irq_find_matching_host(par_np, DOMAIN_BUS_ANY)) { - of_node_put(par_np); return -EPROBE_DEFER; }