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Message-ID: <47FDE881.1030409@gmail.com>
Date: Thu, 10 Apr 2008 12:14:25 +0200
From: Jacek Luczak <difrost.kernel@gmail.com>
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To: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
CC: Stephen Rothwell <sfr@canb.auug.org.au>, linux-next@vger.kernel.org,
       LKML <linux-kernel@vger.kernel.org>, Andy Whitcroft <apw@shadowen.org>
Subject: Re: [BUG] linux-next: Tree for April 9 warning on CC_STACKPROTECTOR,
 followed by kernel panic
References: <20080409185309.b94c9d15.sfr@canb.auug.org.au> <47FDE045.4070509@linux.vnet.ibm.com>
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Kamalesh Babulal pisze:
> Hi Stephen,
> 
> The next-20080409 kernel warns while booting up on a x86_64 machine.
> When compiled the kernel with CONFIG_CC_STACKPROTECTOR=y, the warning
> is followed by the kernel panic.
> 
> Testing -fstack-protector-all feature
> No -fstack-protector-stack-frame!
> -fstack-protector-all test failed
> ------------[ cut here ]------------
> WARNING: at kernel/panic.c:365 __stack_chk_test+0x4b/0x50()
> Modules linked in:
> Pid: 1, comm: swapper Not tainted 2.6.25-rc8-next-20080409-autotest #1
> 
> Call Trace:
>  [<ffffffff80231f5e>] warn_on_slowpath+0x51/0x63
>  [<ffffffff80232d93>] printk+0x4e/0x56
>  [<ffffffff80382fcd>] extract_entropy+0x47/0x90
>  [<ffffffff80230000>] dup_mm+0xca/0x3fd
>  [<ffffffff80231eba>] __stack_chk_test_func+0x21/0x32
>  [<ffffffff80231fbb>] __stack_chk_test+0x4b/0x50
>  [<ffffffff808ba8f1>] kernel_init+0x189/0x2f9
>  [<ffffffff804ee221>] _spin_unlock_irq+0x9/0xc
>  [<ffffffff8020cb88>] child_rip+0xa/0x12
>  [<ffffffff808ba768>] kernel_init+0x0/0x2f9
>  [<ffffffff8020cb7e>] child_rip+0x0/0x12
> 
> ---[ end trace d88d2f3a71e3b32c ]---

Hi,

what version of GCC are you using?

-Jacek