linux-kernel - Re: [BUG][linux-next][ppc] kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: _

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Date:   Fri, 12 Oct 2018 12:36:50 +0200
From:   Christophe LEROY <christophe.leroy@....fr>
To:     Abdul Haleem <abdhalee@...ux.vnet.ibm.com>
Cc:     linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        sachinp <sachinp@...ux.vnet.ibm.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        npiggin <npiggin@...il.com>,
        linux-next <linux-next@...r.kernel.org>,
        manvanth <manvanth@...ux.vnet.ibm.com>
Subject: Re: [BUG][linux-next][ppc] kernel panic - not syncing:
 stack-protector: Kernel stack is corrupted in: __schedule+0x978/0xa80



Le 12/10/2018 à 12:31, Abdul Haleem a écrit :
> On Fri, 2018-10-12 at 10:08 +0200, Christophe LEROY wrote:
>>
>> Le 12/10/2018 à 09:48, Abdul Haleem a écrit :
>>> On Fri, 2018-10-12 at 13:15 +0530, Abdul Haleem wrote:
>>>> Greeting's
>>>>
>>>> Today's linux-next fails to boot on powerpc bare-metal with this error
>>>>
>>>> POWER8 performance monitor hardware support registered
>>>> rcu: Hierarchical SRCU implementation.
>>>> smp: Bringing up secondary CPUs ...
>>>> Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: __schedule+0x978/0xa80
>>>> CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.0-rc7-next-20181010-autotest-autotest #1
>>>> Call Trace:
>>>> [c000001fed5b3bf0] [c000000000a0ef3c] dump_stack+0xb0/0xf4 (unreliable)
>>>> [c000001fed5b3c30] [c0000000000f9d68] panic+0x140/0x308
>>>> [c000001fed5b3cc0] [c0000000000f9844] __stack_chk_fail+0x24/0x30
>>>> [c000001fed5b3d20] [c000000000a2c3a8] __schedule+0x978/0xa80
>>>> [c000001fed5b3e00] [c000000000a2c9b4] schedule_idle+0x34/0x60
>>>> [c000001fed5b3e30] [c00000000013d344] do_idle+0x224/0x3d0
>>>> [c000001fed5b3ec0] [c00000000013d6e0] cpu_startup_entry+0x30/0x50
>>>> [c000001fed5b3ef0] [c000000000047f34] start_secondary+0x4d4/0x520
>>>> [c000001fed5b3f90] [c00000000000b370] start_secondary_prolog+0x10/0x14
>>>> Rebooting in 10 seconds..
>>>>
>>>> Machine: Power 8 bare-metal
>>>> kernel version: 4.19.0-rc7-next-20181010
>>>> gcc version: 4.8.5 20150623
>>>> config attach
>>>
>>> Attaching the kernel config file
>>>
>>
>> # Linux/powerpc 4.11.0-rc4 Kernel Configuration
>>
>> This is not the correct config file. Can you send the .config ?
> 
> CONFIG_HAVE_STACKPROTECTOR=y
> CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
> CONFIG_STACKPROTECTOR=y
> CONFIG_STACKPROTECTOR_STRONG=y
> 
> ah yes, I have attached the correct config now.

Ok,

Could you please try and add a call to function boot_init_stack_canary() 
in function start_secondary() in arch/powerpc/kernel/smp.c just before 
the call to cpu_startup_entry() ?

Thanks
Christophe