[PATCH 5.5 065/367] irqdomain: Fix a memory leak in irq_domain_push_irq()

Greg Kroah-Hartman
2020-02-10T13:07:23Z

From: Kevin Hao <haokexin@gmail.com>

commit 0f394daef89b38d58c91118a2b08b8a1b316703b upstream.

Fix a memory leak reported by kmemleak:
unreferenced object 0xffff000bc6f50e80 (size 128):
comm "kworker/23:2", pid 201, jiffies 4294894947 (age 942.132s)
hex dump (first 32 bytes):
00 00 00 00 41 00 00 00 86 c0 03 00 00 00 00 00 ....A...........
00 a0 b2 c6 0b 00 ff ff 40 51 fd 10 00 80 ff ff ........@Q......
backtrace:
[<00000000e62d2240>] kmem_cache_alloc_trace+0x1a4/0x320
[<00000000279143c9>] irq_domain_push_irq+0x7c/0x188
[<00000000d9f4c154>] thunderx_gpio_probe+0x3ac/0x438
[<00000000fd09ec22>] pci_device_probe+0xe4/0x198
[<00000000d43eca75>] really_probe+0xdc/0x320
[<00000000d3ebab09>] driver_probe_device+0x5c/0xf0
[<000000005b3ecaa0>] __device_attach_driver+0x88/0xc0
[<000000004e5915f5>] bus_for_each_drv+0x7c/0xc8
[<0000000079d4db41>] __device_attach+0xe4/0x140
[<00000000883bbda9>] device_initial_probe+0x18/0x20
[<000000003be59ef6>] bus_probe_device+0x98/0xa0
[<0000000039b03d3f>] deferred_probe_work_func+0x74/0xa8
[<00000000870934ce>] process_one_work+0x1c8/0x470
[<00000000e3cce570>] worker_thread+0x1f8/0x428
[<000000005d64975e>] kthread+0xfc/0x128
[<00000000f0eaa764>] ret_from_fork+0x10/0x18

Fixes: 495c38d3001f ("irqdomain: Add irq_domain_{push,pop}_irq() functions")
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200120043547.22271-1-haokexin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
kernel/irq/irqdomain.c | 1 +
1 file changed, 1 insertion(+)

--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1459,6 +1459,7 @@ int irq_domain_push_irq(struct irq_domai
if (rv) {
/* Restore the original irq_data. */
*root_irq_data = *child_irq_data;
+ kfree(child_irq_data);
goto error;
}