linux-kernel - Re: mmotm 2008-10-02-16-17 uploaded

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Message-Id: <20081007163331.711a938c.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 7 Oct 2008 16:33:31 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"mingo@...e.hu" <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: Re: mmotm 2008-10-02-16-17 uploaded

I'm sorry if alread fixed.

Folloing function in git-x86.patch touches invalid address.
==
+void __init early_cpu_init(void)
+{
+       struct cpu_dev **cdev;
+       int count = 0;
+
+       printk("KERNEL supported cpus:\n");
+       for (cdev = __x86_cpu_dev_start; cdev < __x86_cpu_dev_end; cdev++) {
+               struct cpu_dev *cpudev = *cdev;
+               unsigned int j;
+
+               if (count >= X86_VENDOR_NUM)
+                       break;
+               cpu_devs[count] = cpudev;
+               count++;
+
+               for (j = 0; j < 2; j++) {
+                       if (!cpudev->c_ident[j])
+                               continue;
+                       printk("  %s %s\n", cpudev->c_vendor,
+                               cpudev->c_ident[j]);
+               }
+       }
+
+       early_identify_cpu(&boot_cpu_data);
 }
==
printk("  %s %s\n", cpudev->c_vendor, cpudev->c_ident[j]);
touches invalid address. (following is printk() result by
replacing %s with %p.
==
  ffffffff8066e38a ffffffff8066e383
  ffffffff8066e3ab ffffffff8066e3a2
  ffffffff8066e3af ffffffff8066e3b7
  807064c0c7c74855 08ec834853e58948
  807064c0c7c74855 74c085fffffe9fe8
==
and the kernel never boots on my box.

Thanks,
-Kame


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