linux-kernel - Re: [patch 00/13] devtmpfs patches

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Message-Id: <1242063630.6624.22.camel@moss-terrapins.epoch.ncsc.mil>
Date:	Mon, 11 May 2009 13:40:30 -0400
From:	"David P. Quigley" <dpquigl@...ho.nsa.gov>
To:	Greg KH <greg@...ah.com>
Cc:	linux-kernel@...r.kernel.org, Greg KH <gregkh@...e.de>,
	Kay Sievers <kay.sievers@...y.org>,
	Jan Blunck <jblunck@...e.de>
Subject: Re: [patch 00/13] devtmpfs patches

I took the patches and applied them to Linus' tree and installed the
kernel on a Fedora 10 box with SELinux enabled and it oopses on startup.
The oops happens every time I boot up so I can reproduce it as needed to
help fix it. I've attached my kernel config in case that helps and have
pasted the oops below. If needed I can provide the entire dmesg output.

Dave

BUG: Dentry ffff88012b4043c0{i=4,n=/} still in use (-1) [unmount of tmpfs tmpfs]
------------[ cut here ]------------
kernel BUG at fs/dcache.c:669!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/virtual/net/virbr0/bridge/stp_state
CPU 3 
Modules linked in: ipt_MASQUERADE iptable_nat nf_nat sco bridge stp bnep l2cap bluetooth ppdev parport_pc parport sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 cpufreq_ondemand acpi_cpufreq freq_table dm_multipath uinput snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd e1000e i2c_i801 soundcore i2c_core serio_raw snd_page_alloc pcspkr dcdbas iTCO_wdt iTCO_vendor_support [last unloaded: microcode]
Pid: 2342, comm: mingetty Not tainted 2.6.30-rc5 #1 OptiPlex 755                 
RIP: 0010:[<ffffffff810df875>]  [<ffffffff810df875>] shrink_dcache_for_umount_subtree+0x1ac/0x275
RSP: 0018:ffff88012111f848  EFLAGS: 00010292
RAX: 0000000000000054 RBX: ffff88012b4043c0 RCX: 0000000000020000
RDX: 00000000ffffffff RSI: 0000000000000082 RDI: 0000000000000246
RBP: ffff88012111f888 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000018600 R12: ffff88012b4043c0
R13: 00000000000000d1 R14: ffff88012b4044e0 R15: ffffffff815f7c40
FS:  00007f569bb196f0(0000) GS:ffff880028073000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000035a84fc100 CR3: 0000000121c3b000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process mingetty (pid: 2342, threadinfo ffff88012111e000, task ffff8801261f1700)
Stack:
 ffff88012bc31e88 0000000000000000 ffff88012111f878 ffff88012bc31c00
 ffffffff81383030 0000000000000040 0000000000010140 ffff88012ba409d8
 ffff88012111f8a8 ffffffff810df975 ffffffff810e4c69 ffff88012bc31c00
Call Trace:
 [<ffffffff810df975>] shrink_dcache_for_umount+0x37/0x47
 [<ffffffff810e4c69>] ? free_vfsmnt+0x50/0x55
 [<ffffffff810d209d>] generic_shutdown_super+0x1e/0xea
 [<ffffffff810d21b4>] kill_anon_super+0x11/0x43
 [<ffffffff810d2208>] kill_litter_super+0x22/0x26
 [<ffffffff810d2840>] deactivate_super+0x6a/0x82
 [<ffffffff810e4d7b>] mntput_no_expire+0x10d/0x14e
 [<ffffffff810d8d53>] ? path_walk+0xc7/0xd4
 [<ffffffff810d7793>] mntput+0x18/0x1a
 [<ffffffff810d78b4>] path_put+0x1d/0x22
 [<ffffffff8121d2c0>] devtmpfs_create_node+0x209/0x229
 [<ffffffff810e11a2>] ? iput+0x2f/0x66
 [<ffffffff81120f90>] ? sysfs_addrm_finish+0x69/0x217
 [<ffffffff81120bd1>] ? sysfs_add_one+0x1c/0xe6
 [<ffffffff81121a63>] ? sysfs_do_create_link+0xe0/0x131
 [<ffffffff81217c6a>] device_add+0x1a7/0x54b
 [<ffffffff81183ff4>] ? kobject_init+0x43/0x83
 [<ffffffff81218027>] device_register+0x19/0x1d
 [<ffffffff812180c3>] device_create_vargs+0x98/0xc6
 [<ffffffff8121811d>] device_create+0x2c/0x2e
 [<ffffffff811ff222>] ? reset_terminal+0x2d0/0x2d5
 [<ffffffff811fa673>] vcs_make_sysfs+0x33/0x62
 [<ffffffff81200949>] vc_allocate+0x186/0x1aa
 [<ffffffff8105defc>] ? down+0x33/0x3b
 [<ffffffff8120099f>] con_open+0x32/0xc2
 [<ffffffff811f2c4f>] tty_open+0x2ef/0x430
 [<ffffffff810d2c52>] chrdev_open+0x14b/0x16a
 [<ffffffff811579c4>] ? selinux_dentry_open+0xed/0xf6
 [<ffffffff810d2b07>] ? chrdev_open+0x0/0x16a
 [<ffffffff810ce576>] __dentry_open+0x150/0x269
 [<ffffffff810ce75c>] nameidata_to_filp+0x41/0x53
 [<ffffffff810da1ff>] do_filp_open+0x494/0x8b2
 [<ffffffff810e4c9f>] ? mntput_no_expire+0x31/0x14e
 [<ffffffff8118a755>] ? might_fault+0x1a/0x1c
 [<ffffffff810e3540>] ? alloc_fd+0x110/0x124
 [<ffffffff810ce369>] do_sys_open+0x56/0xd6
 [<ffffffff810ce412>] sys_open+0x1b/0x1d
 [<ffffffff81010c02>] system_call_fastpath+0x16/0x1b
Code: 08 49 8b 44 24 10 48 85 c0 74 04 48 8b 50 40 48 8d 86 88 02 00 00 48 c7 c7 0e cb 48 81 4c 89 e6 48 89 04 24 31 c0 e8 79 8f 28 00 <0f> 0b eb fe 49 8b 5c 24 28 49 39 dc 75 04 31 db eb 03 f0 ff 0b 
RIP  [<ffffffff810df875>] shrink_dcache_for_umount_subtree+0x1ac/0x275
 RSP <ffff88012111f848>
---[ end trace 5ce2844beb187c5b ]---

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