Message-ID: <AANLkTinj2sk==Jw7ZL3RvO_M7iRPW0sQy8dsvabo-V5h@mail.gmail.com>
Date:	Fri, 5 Nov 2010 15:10:07 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Randy Dunlap <randy.dunlap@...cle.com>,
	Jens Axboe <jaxboe@...ionio.com>,
	David Miller <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.37-rc1 (floppy module load: no device found)

That first warning says that something stayed on a list even though it
was released (the 0x6b thing is the kmalloc free poison pattern). And
the oops looks related to something similar.

Randy, is this one also related to that ipv6 percpu list corruption?
IOW, does it go away with

  http://patchwork.ozlabs.org/patch/69939/

like one of your other reports did?

And David - I think we need that patch merged. The error case for when
the percpu list entry is free'd without unlinking is _so_ annoying
(random crashes in totally unrelated code) that I think we need to get
that one closed asap. Hmm?

                           Linus

On Wed, Nov 3, 2010 at 4:16 PM, Randy Dunlap <randy.dunlap@...cle.com> wrote:
>
>
> [  303.127418] calling  floppy_module_init+0x0/0x93 [floppy] @ 5726
> [  303.134577] ------------[ cut here ]------------
> [  303.139329] WARNING: at /local/linsrc/lnx-2637-rc1/lib/list_debug.c:26 __list_add+0x4d/0xa5()
> [  303.148248] Hardware name: OptiPlex GX620
> [  303.153682] list_add corruption. next->prev should be prev (ffffffff81ae5e50), but was 6b6b6b6b6b6b6b6b. (next=ffff88006c908590).
> [  303.165678] Modules linked in: floppy(+) ipt_MASQUERADE iptable_nat nf_nat af_packet nfsd lockd nfs_acl auth_rpcgss exportfs sco bridge stp llc bnep l2cap crc16 bluetooth rfkill sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables x_tables ipv6 p4_clockmod freq_table speedstep_lib binfmt_misc dm_mirror dm_region_hash dm_log dm_multipath scsi_dh dm_mod kvm uinput mousedev joydev snd_intel8x0 snd_ac97_codec ppdev ac97_bus snd_seq snd_seq_device led_class snd_pcm iTCO_wdt snd_timer usbmouse iTCO_vendor_support usbkbd snd usbhid tg3 hid sg dcdbas sr_mod soundcore rtc_cmos pcspkr i2c_i801 cdrom parport_pc rng_core evdev snd_page_alloc shpchp rtc_core parport rtc_lib mac_hid pci_hotplug 8250_pnp unix ide_pci_generic ide_core ata_generic pata_acpi ata_piix sd_mod crc_t10dif ext3 jbd mbcache uhci_hcd ohci_hcd ssb mmc_core pcmcia pcmcia_core firmware_class!
>  ehci_hcd usbcore nls_base i915 drm_kms_helper intel_agp button intel_gtt video thermal_sys hwmon output [last unloaded: mperf]
> [  303.269866] Pid: 5726, comm: modprobe Not tainted 2.6.37-rc1 #10
> [  303.275973] Call Trace:
> [  303.278775]  [<ffffffff8107e1ed>] warn_slowpath_common+0xc6/0xf3
> Nov  3 16:13:19 [  303.284885]  [<ffffffff812d3582>] ? __percpu_counter_init+0x9e/0xdf
> control kernel: [  303.292959]  [<ffffffff8107e30a>] warn_slowpath_fmt+0x5b/0x6b
> [  303.127418] c[  303.299754]  [<ffffffff812cf38b>] __list_add+0x4d/0xa5
> alling  floppy_m[  303.306249]  [<ffffffff812d359f>] __percpu_counter_init+0xbb/0xdf
> odule_init+0x0/0[  303.314093]  [<ffffffff8117c577>] bdi_init+0x13f/0x1c2
> x93 [floppy] @ 5[  303.320270]  [<ffffffffa0bdb3bb>] ? do_fd_request+0x0/0x111 [floppy]
> 726
> Nov  3 16:13[  303.328429]  [<ffffffffa0bdb3bb>] ? do_fd_request+0x0/0x111 [floppy]
> :19 control kern[  303.335791]  [<ffffffff812a7444>] blk_alloc_queue_node+0x8f/0x220
> el: [  303.13457[  303.343257]  [<ffffffff812a773b>] blk_init_queue_node+0x30/0x90
> 7] ------------[[  303.350874]  [<ffffffff812a77b3>] blk_init_queue+0x18/0x21
>  cut here ]-----[  303.357447]  [<ffffffffa0bf29da>] floppy_init+0x95/0x7c0 [floppy]
> -------
> Nov  3 1[  303.365279]  [<ffffffff81017b19>] ? read_tsc+0x17/0x29
> 6:13:19 control [  303.371436]  [<ffffffffa0bf3105>] ? floppy_module_init+0x0/0x93 [floppy]
> kernel: [  303.1[  303.379517]  [<ffffffffa0bf318d>] floppy_module_init+0x88/0x93 [floppy]
> 39329] WARNING: [  303.387890]  [<ffffffffa0bf3105>] ? floppy_module_init+0x0/0x93 [floppy]
> at /local/linsrc[  303.395650]  [<ffffffff810020a6>] do_one_initcall+0x6c/0x1ef
> /lnx-2637-rc1/li[  303.403068]  [<ffffffff810d52f3>] sys_init_module+0xe1/0x2a5
> b/list_debug.c:2[  303.409709]  [<ffffffff8100ea72>] system_call_fastpath+0x16/0x1b
> 6 __list_add+0x4Nov  3 16:13:19 control kernel: [  303.419712] ---[ end trace e26c2a9ce976be75 ]---
> cd usbcore nls_base i915 drm_kms_helper intel_ag[  303.429812] Floppy drive(s):p button intel_g fd0 is 1.44Mtt video thermal
> _sys hwmon output [last unloaded: mperf]
> Nov  3 16:13:19 control kernel: [  303.269866] Pid: 5726, comm: modprobe Not tainted 2.6.37-rc1 #10
> Nov  3 16:13:19 control kernel: [  303.275973] Call Trace:
> Nov  3 16:13:19 control kernel: [  303.278775]  [<ffffffff8107e1ed>] warn_slowpath_common+0xc6/0xf3
> Nov  3 16:13:19 control kernel: [  3
>
> [  306.480304] floppy0: no floppy controllers found
> Nov  3 16:13:22 [  306.488160] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
> [  306.492030] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.1/usb3/3-1/3-1.3/devnum
> [  306.492030] CPU 0
> [  306.492030] Modules linked in: floppy(+) ipt_MASQUERADE iptable_nat nf_nat af_packet nfsd lockd nfs_acl auth_rpcgss exportfs sco bridge stp llc bnep l2cap crc16 bluetooth rfkill sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables x_tables ipv6 p4_clockmod freq_table speedstep_lib binfmt_misc dm_mirror dm_region_hash dm_log dm_multipath scsi_dh dm_mod kvm uinput mousedev joydev snd_intel8x0 snd_ac97_codec ppdev ac97_bus snd_seq snd_seq_device led_class snd_pcm iTCO_wdt snd_timer usbmouse iTCO_vendor_support usbkbd snd usbhid tg3 hid sg dcdbas sr_mod soundcore rtc_cmos pcspkr i2c_i801 cdrom parport_pc rng_core evdev snd_page_alloc shpchp rtc_core parport rtc_lib mac_hid pci_hotplug 8250_pnp unix ide_pci_generic ide_core ata_generic pata_acpi ata_piix sd_mod crc_t10dif ext3 jbd mbcache uhci_hcd ohci_hcd ssb mmc_core pcmcia pcmcia_core firmware_class!
>  ehci_hcd usbcore nls_base i915 drm_kms_helper intel_agp button intel_gtt video thermal_sys hwmon output [last unloaded: mperf]
> [  306.626211]
> [  306.626211] Pid: 5726, comm: modprobe Tainted: G        W   2.6.37-rc1 #10 0HH807/OptiPlex GX620
> [  306.626211] RIP: 0010:[<ffffffff810c309f>]  [<ffffffff810c309f>] __lock_acquire+0xd8/0x4e8
> [  306.626211] RSP: 0018:ffff88006d38dd48  EFLAGS: 00010002
> [  306.626211] RAX: 0000000000000006 RBX: 6b6b6b6b6b6b6d13 RCX: 0000000000000000
> [  306.626211] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 6b6b6b6b6b6b6d13
> [  306.626211] RBP: ffff88006d38dda8 R08: 0000000000000001 R09: 0000000000000001
> [  306.626211] R10: ffffffff81812d48 R11: ffff88006d38de78 R12: 0000000000000000
> [  306.626211] R13: ffff88006cb13000 R14: 0000000000000000 R15: 0000000000000000
> [  306.626211] FS:  00007f248ff436f0(0000) GS:ffff88007c600000(0000) knlGS:0000000000000000
> [  306.626211] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [  306.626211] CR2: 000000000064b000 CR3: 000000006c976000 CR4: 00000000000006f0
> [  306.626211] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [  306.626211] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> [  306.626211] Process modprobe (pid: 5726, threadinfo ffff88006d38c000, task ffff88006cb13000)
> [  306.626211] Stack:
> [  306.783845]  0000000000000202 ffffffff812b10c2 ffff88006d38dd88 ffffffff811b2af3
> [  306.787082]  ffff88006d24ca88 000000006d24ca88 ffff88006d38dd88 0000000000000000
> [  306.787082]  ffff88006cb13000 ffffffff81092650 0000000000000001 0000000000000000
> [  306.787082] Call Trace:
> [  306.787082]  [<ffffffff812b10c2>] ? disk_release+0x97/0xa3
> [  306.787082]  [<ffffffff811b2af3>] ? __slab_free+0x1b9/0x1d6
> [  306.787082]  [<ffffffff81092650>] ? del_timer_sync+0x50/0x15c
> [  306.787082]  [<ffffffff810c35af>] lock_acquire+0x100/0x150
> [  306.787082]  [<ffffffff81092650>] ? del_timer_sync+0x50/0x15c
> [  306.787082]  [<ffffffff81092694>] del_timer_sync+0x94/0x15c
> [  306.874354]  [<ffffffff81092650>] ? del_timer_sync+0x50/0x15c
> [  306.874354]  [<ffffffff812a763f>] blk_sync_queue+0x24/0x55
> [  306.874354]  [<ffffffff812a7692>] blk_cleanup_queue+0x22/0x9b
> [  306.874354]  [<ffffffffa0bf30e1>] floppy_init+0x79c/0x7c0 [floppy]
> [  306.874354]  [<ffffffff81017b19>] ? read_tsc+0x17/0x29
> [  306.874354]  [<ffffffffa0bf3105>] ? floppy_module_init+0x0/0x93 [floppy]
> [  306.874354]  [<ffffffffa0bf318d>] floppy_module_init+0x88/0x93 [floppy]
> [  306.874354]  [<ffffffffa0bf3105>] ? floppy_module_init+0x0/0x93 [floppy]
> [  306.940576]  [<ffffffff810020a6>] do_one_initcall+0x6c/0x1ef
> [  306.943732]  [<ffffffff810d52f3>] sys_init_module+0xe1/0x2a5
> [  306.943732]  [<ffffffff8100ea72>] system_call_fastpath+0x16/0x1b
> [  306.943732] Code: 05 4f 15 72 01 e8 9c b1 fb ff 48 ff 05 4b 15 72 01 48 ff 05 4c 15 72 01 48 ff 05 55 15 72 01 e9 e3 03 00 00 48 ff 05 41 15 72 01 <48> 81 3b 40 34 0b 82 75 07 48 ff 05 41 15 72 01 83 fe 01 77 13
> [  306.982675] RIP  [<ffffffff810c309f>] __lock_acquire+0xd8/0x4e8
> [  306.982675]  RSP <ffff88006d38dd48>
> [  306.982675] ---[ end trace e26c2a9ce976be76 ]---
> Nov  3 16:13:22 control kernel: Nov  3 16:13:22 Nov  3 16:13:22 control kernel: [  306.492030] CPU 0
>
>
> ---
> ~Randy
> *** Remember to use Documentation/SubmitChecklist when testing your code ***
>
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