From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Wed, 21 Nov 2007 01:32:19 +0000 (-0800)
Subject: [SPARC64]: check for possible NULL pointer dereference
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=75c6d1410caa6fea861ef3802e8b186f7685f235;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[SPARC64]: check for possible NULL pointer dereference

This patch adds checking for possible NULL pointer dereference
if of_find_property() failed.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index 8c4875bdb4a8..e587a372f3fe 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -1022,6 +1022,10 @@ void __init sun4v_pci_init(struct device_node *dp, char *model_name)
 	}
 
 	prop = of_find_property(dp, "reg", NULL);
+	if (!prop) {
+		prom_printf("SUN4V_PCI: Could not find config registers\n");
+		prom_halt();
+	}
 	regs = prop->value;
 
 	devhandle = (regs->phys_addr >> 32UL) & 0x0fffffff;