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Date: Tue, 14 Nov 2017 08:41:40 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Cc: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
        akpm@linux-foundation.org, linux@roeck-us.net,
        shuahkh@osg.samsung.com, patches@kernelci.org,
        ben.hutchings@codethink.co.uk, stable@vger.kernel.org
Subject: Re: [PATCH 4.9 00/87] 4.9.62-stable review --> crash
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 <2bdb5773-68e2-2758-be69-56d91557e98d@dd-wrt.com>
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On Tue, Nov 14, 2017 at 07:48:47AM +0100, Sebastian Gottschall wrote:
> ahm it compiles well. but
> 
> [�� 24.838120] Unable to handle kernel NULL pointer dereference at virtual
> address 00000055
> [�� 24.846193] pgd = c0004000
> [�� 24.848893] [00000055] *pgd=00000000
> [�� 24.852472] Internal error: Oops - BUG: 817 [#1] PREEMPT SMP ARM
> [�� 24.858463] Modules linked in: xhci_plat_hcd xhci_pci xhci_hcd ohci_hcd
> ehci_pci ehci_platform ehci_hcd usbcore usb_common nls_base qca_ssdk
> gpio_pca953x mii_gpio wil6210 ath10k_pci ath10k_core ath9k ath9k_common
> ath9k_hw ath mac80211 cfg80211 compat
> [�� 24.880852] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.9.62-rc1 #90
> [�� 24.887189] Hardware name: AnnapurnaLabs Alpine (Device Tree)
> [�� 24.892921] task: ef029ac0 task.stack: ef05a000
> [�� 24.897444] PC is at nf_nat_cleanup_conntrack+0x4c/0x74
> [�� 24.902657] LR is at nf_nat_cleanup_conntrack+0x38/0x74
> [�� 24.907869] pc : [<c04858c8>]��� lr : [<c04858b4>]��� psr: 60000153
> [�� 24.907869] sp : ef05bb58� ip : ef05bb58� fp : ef05bb6c
> [�� 24.919317] r10: ed230cc0� r9 : ed230c00� r8 : edf45800
> [�� 24.924529] r7 : ebcd2f00� r6 : ec33739e� r5 : c0892294� r4 : ebcd2f00
> [�� 24.931040] r3 : 00000000� r2 : 00000055� r1 : 00000000� r0 : c0892718
> [�� 24.937551] Flags: nZCv� IRQs on� FIQs off� Mode SVC_32� ISA ARM� Segment
> user
> [�� 24.944755] Control: 10c5387d� Table: 2bd1006a� DAC: 00000055
> [�� 24.950486] Process swapper/2 (pid: 0, stack limit = 0xef05a210)
> [�� 24.956477] Stack: (0xef05bb58 to 0xef05c000)
> 
> 
> will dig into the code to find the reason

Can you run 'git bisect' or if you use quilt, do a manual bisect to find
the offending patch?

thanks,

greg k-h