linux-kernel - [2.6 patch] drivers/pci/hotplug/ibmphp

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Message-ID: <20061117011925.GO31879@stusta.de>
Date:	Fri, 17 Nov 2006 02:19:25 +0100
From:	Adrian Bunk <bunk@...sta.de>
To:	gregkh@...e.de
Cc:	linux-kernel@...r.kernel.org, linux-pci@...ey.karlin.mff.cuni.cz
Subject: [2.6 patch] drivers/pci/hotplug/ibmphp_pci.c: fix NULL dereference

The correct order is: NULL check before dereference

Spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@...sta.de>

--- linux-2.6.19-rc5-mm2/drivers/pci/hotplug/ibmphp_pci.c.old	2006-11-16 22:44:42.000000000 +0100
+++ linux-2.6.19-rc5-mm2/drivers/pci/hotplug/ibmphp_pci.c	2006-11-16 22:43:44.000000000 +0100
@@ -1371,12 +1371,12 @@ static int unconfigure_boot_bridge (u8 b
 	}
 
 	bus = ibmphp_find_res_bus (sec_number);
-	debug ("bus->busno is %x\n", bus->busno);
-	debug ("sec_number is %x\n", sec_number);
 	if (!bus) {
 		err ("cannot find Bus structure for the bridged device\n");
 		return -EINVAL;
 	}
+	debug("bus->busno is %x\n", bus->busno);
+	debug("sec_number is %x\n", sec_number);
 
 	ibmphp_remove_bus (bus, busno);
 
-
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