linux-kernel - [oops] sysdev: Pass the attribute to the low level sysdev show/store function

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Date:	Thu, 24 Jul 2008 13:27:24 +0200
From:	Mike Galbraith <efault@....de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andi Kleen <andi@...stfloor.org>
Subject: [oops] sysdev: Pass the attribute to the low level sysdev
	show/store function

Greetings,

Oops below bisects to..

4a0b2b4dbe1335b8b9886ba3dc85a145d5d938ed is first bad commit
commit 4a0b2b4dbe1335b8b9886ba3dc85a145d5d938ed
Author: Andi Kleen <andi@...stfloor.org>
Date:   Tue Jul 1 18:48:41 2008 +0200

    sysdev: Pass the attribute to the low level sysdev show/store function

[   85.792961] BUG: unable to handle kernel NULL pointer dereference at 0000000000000002
[   85.796503] IP: [<ffffffff8022fe4f>] sched_mc_power_savings_store+0x13/0x40
[   85.796503] PGD 0 
[   85.796503] Oops: 0000 [1] SMP 
[   85.796503] CPU 1 
[   85.796503] Modules linked in: ip6t_LOG xt_tcpudp xt_pkttype xt_limit snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device af_packet ip6t_REJECT nf_conntrack_ipv6 ipt_REJECT xt_state iptable_mangle iptable_nat nf_nat iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_ipv4 nf_conntrack ip_tables cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq ip6table_filter ip6_tables x_tables ipv6 microcode nls_iso8859_1 nls_cp437 vfat fat fuse loop dm_mod tda1004x saa7134_dvb videobuf_dvb dvb_core tda827x tda8290 tuner saa7134 ir_common compat_ioctl32 videodev v4l1_compat snd_hda_intel v4l2_common firewire_ohci snd_pcm videobuf_dma_sg videobuf_core firewire_core snd_timer snd_page_alloc tveeprom crc_itu_t i2c_i801 snd_hwdep usb_storage iTCO_wdt sr_mod e1000e snd rtc_cmos cdrom ohci1394 i2c_core iTCO_vendor_support rtc_core ieee1394 button intel_agp sg soundcore rtc_lib usbhid hid ff_memless ehci_hcd uhci_hcd sd_mod usbcore edd ext3 mbcache jbd fan ahci libata scsi_mod dock thermal processor
[   85.796503] Pid: 5514, comm: sched-powersave Not tainted 2.6.27-smp #16
[   85.796503] RIP: 0010:[<ffffffff8022fe4f>]  [<ffffffff8022fe4f>] sched_mc_power_savings_store+0x13/0x40
[   85.796503] RSP: 0018:ffff8800a69b7e98  EFLAGS: 00010292
[   85.796503] RAX: fffffffffffffffb RBX: 0000000000000002 RCX: ffffffffffffffea
[   85.796503] RDX: 0000000000000002 RSI: ffff8800a9c18000 RDI: ffffffff80557f90
[   85.796503] RBP: ffff8800a69b7ea8 R08: ffffffff8022fe3c R09: ffff8800a9c18000
[   85.796503] R10: 000000000009f868 R11: 0000000000000001 R12: ffff8800b11cfba0
[   85.796503] R13: ffff8800bf80b730 R14: 00000000ffffffed R15: ffffffff80557fd8
[   85.796503] FS:  00007f23d609d6f0(0000) GS:ffff8800bf809480(0000) knlGS:0000000000000000
[   85.958513] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[   85.964251] CR2: 0000000000000002 CR3: 00000000a6947000 CR4: 00000000000006e0
[   85.968514] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   85.968514] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[   85.968514] Process sched-powersave (pid: 5514, threadinfo ffff8800a69b6000, task ffff8800bd426820)
[   85.998516] Stack:  ffff8800a69b7ea8 ffffffff80557a10 ffff8800a69b7eb8 ffffffff8037a533
[   86.006589]  ffff8800a69b7f08 ffffffff802d7d19 ffff8800a69b7f48 ffff8800b11cfbc0
[   86.008516]  ffffffff80557a10 0000000000000002 ffff8800a683b600 ffff8800a69b7f48
[   86.008516] Call Trace:
[   86.008516]  [<ffffffff8037a533>] sysdev_class_store+0x24/0x26
[   86.008516]  [<ffffffff802d7d19>] sysfs_write_file+0xdf/0x114
[   86.008516]  [<ffffffff80291dfc>] vfs_write+0xab/0x105
[   86.008516]  [<ffffffff80291f1a>] sys_write+0x47/0x6f
[   86.008516]  [<ffffffff8020c1cb>] system_call_after_swapgs+0x7b/0x80
[   86.008516] 
[   86.008516] 
[   86.008516] Code: c7 c7 d0 d8 53 80 89 c3 e8 40 07 1f 00 e8 cf 60 00 00 89 d8 5e 5b c9 c3 55 48 89 e5 53 48 89 cb 48 83 ec 08 48 c7 c1 ea ff ff ff <8a> 12 8d 42 d0 3c 01 77 1d 31 c0 80 fa 31 0f 94 c0 89 05 a6 c4 
[   86.008516] RIP  [<ffffffff8022fe4f>] sched_mc_power_savings_store+0x13/0x40
[   86.008516]  RSP <ffff8800a69b7e98>
[   86.008516] CR2: 0000000000000002
[   86.092212] ---[ end trace 35b0ed9dbfbda663 ]---


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