6.1-stable review patch. If anyone has any objections, please let me know.
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From: Joe Hattori joe@pf.is.s.u-tokyo.ac.jp
commit 9322d1915f9d976ee48c09d800fbd5169bc2ddcc upstream.
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.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/irqchip/irqchip.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- 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 platfo * 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; }