diff options
| author | Wen Yang <wen.yang99@zte.com.cn> | 2019-07-08 09:19:04 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-09 15:53:50 +0300 |
| commit | 7c8e90ddf02f139a90bc29c04302e9914818f0c8 (patch) | |
| tree | 89ccf6f0e577abb444266a5f34b408e515e73eaf /drivers/irqchip/irq-renesas-rza1.c | |
| parent | 222a21d29521d144f3dd7a0bc4d4020e448f0126 (diff) | |
| download | linux-7c8e90ddf02f139a90bc29c04302e9914818f0c8.tar.xz | |
irqchip/renesas-rza1: Prevent use-after-free in rza1_irqc_probe()
The gic_node is still being used in the rza1_irqc_parse_map() call
after the of_node_put() call, which may result in use-after-free.
Fixes: a644ccb819bc ("irqchip: Add Renesas RZ/A1 Interrupt Controller driver")
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lkml.kernel.org/r/1562566745-7447-3-git-send-email-wen.yang99@zte.com.cn
Diffstat (limited to 'drivers/irqchip/irq-renesas-rza1.c')
| -rw-r--r-- | drivers/irqchip/irq-renesas-rza1.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/irqchip/irq-renesas-rza1.c b/drivers/irqchip/irq-renesas-rza1.c index b1f19b210190..b0d46ac42b89 100644 --- a/drivers/irqchip/irq-renesas-rza1.c +++ b/drivers/irqchip/irq-renesas-rza1.c @@ -208,20 +208,19 @@ static int rza1_irqc_probe(struct platform_device *pdev) return PTR_ERR(priv->base); gic_node = of_irq_find_parent(np); - if (gic_node) { + if (gic_node) parent = irq_find_host(gic_node); - of_node_put(gic_node); - } if (!parent) { dev_err(dev, "cannot find parent domain\n"); - return -ENODEV; + ret = -ENODEV; + goto out_put_node; } ret = rza1_irqc_parse_map(priv, gic_node); if (ret) { dev_err(dev, "cannot parse %s: %d\n", "interrupt-map", ret); - return ret; + goto out_put_node; } priv->chip.name = "rza1-irqc", @@ -237,10 +236,12 @@ static int rza1_irqc_probe(struct platform_device *pdev) priv); if (!priv->irq_domain) { dev_err(dev, "cannot initialize irq domain\n"); - return -ENOMEM; + ret = -ENOMEM; } - return 0; +out_put_node: + of_node_put(gic_node); + return ret; } static int rza1_irqc_remove(struct platform_device *pdev) |