From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bernard Pidoux Subject: Re: [AX25] kernel panic Date: Thu, 20 Mar 2008 23:58:35 +0100 Message-ID: <47E2EC1B.9070405@free.fr> References: <47DF9D21.20807@free.fr> <20080318212531.GA2031@electric-eye.fr.zoreil.com> <47E0C261.3000106@free.fr> <47E17E2E.9050105@free.fr> <20080320073021.GA4037@ff.dom.local> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Cc: Francois Romieu , Linux Netdev List , Jarek Poplawski To: Jarek Poplawski Return-path: Received: from smtp5-g19.free.fr ([212.27.42.35]:48179 "EHLO smtp5-g19.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751395AbYCTW6k (ORCPT ); Thu, 20 Mar 2008 18:58:40 -0400 In-Reply-To: <20080320073021.GA4037@ff.dom.local> Sender: netdev-owner@vger.kernel.org List-ID: Jarek Poplawski wrote: > On Wed, Mar 19, 2008 at 09:57:18PM +0100, Bernard Pidoux wrote: > ... >> I also tried to revert Jarek's mkiss ax_bump() patch, but this did not >> prevent >> kernel lockup, although this time swapper is involved and not ax25ipd. > ... >> BUG: unable to handle kernel paging request at virtual address 6b6b6c2b >> printing eip: c013fc67 *pde = 00000000 >> Oops: 0002 [#1] SMP > > Well, the rest looks very similarly and not trivial... Probably a > socket is destructed too soon (or something...). Could you try to > reproduce this with some debugging turned off, e.g.: > CONFIG_DEBUG_LOCK_ALLOC, CONFIG_DEBUG_PAGEALLOC, (CONFIG_SLUB_DEBUG?). > > Regards, > Jarek P. I recompiled the kernel after turning off the above options. However there is still a kernel panic documented below. Does it help ? Bernard Pidoux BUG: spinlock bad magic on CPU#0, swapper/0 BUG: unable to handle kernel paging request at virtual address 6b6b6c2f printing eip: c01e730b *pde = 00000000 Oops: 0000 [#1] SMP Modules linked in: rose netrom mkiss crc16 ax25 mga drm netconsole configfs nfsd exportfs nfs lockd nfs_acl sunrpc af_packet ipv6 snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss binfmt_misc loop usb_storage scsi_mod floppy usbhid snd_ens1371 snd_rawmidi snd_seq_device snd_ac97_codec snd_pcm snd_timer snd uhci_hcd intel_agp ne2k_pci ide_cd usbcore soundcore snd_page_alloc ac97_bus 8390 agpgart genrtc ext3 jbd ide_disk piix ide_core Pid: 0, comm: swapper Not tainted (2.6.24.3 #8) EIP: 0060:[] EFLAGS: 00010002 CPU: 0 EIP is at spin_bug+0xdb/0xf0 EAX: 0000002f EBX: 6b6b6b6b ECX: 6b6b6b6b EDX: 00000082 ESI: c07e5a38 EDI: c0333633 EBP: c0379c78 ESP: c0379c54 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Process swapper (pid: 0, ti=c0378000 task=c0353340 task.ti=c0378000) Stack: c0333724 c0333633 00000000 c0353509 00000000 00000010 c07e5a38 00000001 c7b8abb8 c0379cb0 c01e7409 c11448c8 c1147740 00000000 c11448c0 c0379cb8 c114775c c11448c8 c1147740 00000000 00000282 00000001 c7b8abb8 c0379cbc Call Trace: [] show_trace_log_lvl+0x1a/0x30 [] show_stack_log_lvl+0xa9/0xd0 [] show_registers+0xc7/0x1b0 [] die+0x10a/0x230 [] do_page_fault+0x2f5/0x600 [] error_code+0x72/0x78 [] _raw_spin_lock+0x69/0x140 [] _spin_lock_irqsave+0xc/0x20 [] __wake_up+0x1b/0x50 [] sock_def_write_space+0x9c/0xc0 [] sock_wfree+0x3c/0x50 [] skb_release_all+0x57/0x130 [] __kfree_skb+0xb/0x90 [] kfree_skb+0x19/0x40 [] ax25_frames_acked+0x43/0x70 [ax25] [] ax25_check_iframes_acked+0x40/0x60 [ax25] [] ax25_std_frame_in+0x6af/0x890 [ax25] [] ax25_kiss_rcv+0x2bb/0x7c0 [ax25] [] netif_receive_skb+0x33b/0x420 [] process_backlog+0x6b/0xd0 [] net_rx_action+0xff/0x1a0 [] __do_softirq+0x84/0x100 [] do_softirq+0x3b/0x50 [] irq_exit+0x79/0x90 [] do_IRQ+0x46/0x80 [] common_interrupt+0x23/0x28 [] cpu_idle+0x76/0xa0 [] rest_init+0x49/0x50 [] start_kernel+0x2b5/0x330 [<00000000>] 0x0 ======================= Code: 00 64 8b 0d 08 f0 3a c0 89 44 24 0c 89 4c 24 08 89 54 24 10 89 7c 24 04 c7 04 24 24 37 33 c0 e8 5c 6f f3 ff 85 db 8b 4e 08 74 83 <8b> 93 c4 00 00 00 8d 83 c9 01 00 00 e9 7c ff ff ff 8d 74 26 00 EIP: [] spin_bug+0xdb/0xf0 SS:ESP 0068:c0379c54 Kernel panic - not syncing: Fatal exception in interrupt