(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Fri, 12 Nov 2010 12:05:49 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=22782
> 
>            Summary: 2.6.36: general protection fault during lockfs
>                     lockspace removal
>            Product: File System
>            Version: 2.5
>     Kernel Version: 2.6.36

Seems to be a 2.6.35->2.6.36 regression, but nobody has mucked with
configfs for a while?


>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: high
>           Priority: P1
>          Component: Other
>         AssignedTo: fs_other@kernel-bugs.osdl.org
>         ReportedBy: nik@linuxbox.cz
>         Regression: Yes
> 
> 
> during lockfs lockspace removal, sometimes GPF occurs:
> 
> general protection fault: 0000 [#1] PREEMPT SMP
> last sysfs file: /sys/kernel/dlm/30D118C784964730BDAF2115299250CD/control
> CPU 3
> Modules linked in: ocfs2 ocfs2_nodemanager ocfs2_stack_user ocfs2_stackglue
> nfs
> nfs_acl auth_rpcgss dlm configfs drbd lru_cache cf_conntrack_ipv4
> nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter
> ip_tables x_tables bridge stp llc ipv6hc fan battery ac kvm_intel kvm ppdev
> parport_pc iTCO_wdt i2c_i801 e1000e video cdc_acm pcspkr i3200_edac edac_core
> i2c_core buttlight container thermal output processor thermal_sys sd_mod
> crc_t10dif raid1 dm_snapshot dm_zero dm_mirror dm_region_hash dm_log ohci_hcd
> ehci_hcd ahci libahci libata scsi_mod [last unloaded: scsi_wait_scan]         
> 
> Pid: 8167, comm: dlm_controld.pc Not tainted 2.6.36lb.00_01_PRE11 #1
> X7SBA/X7SBA
> RIP: 0010:[<ffffffffa049e0c3>]  [<ffffffffa049e0c3>] unlink_group+0x13/0x50
> [configfs]
> RSP: 0018:ffff8801259b5dd8  EFLAGS: 00010286
> RAX: ffff000000000000 RBX: 0000000000000008 RCX: 0000000000000000
> RDX: ffffffffa04c3570 RSI: ffff880125a2fd00 RDI: ffff88010200000a
> RBP: ffff8801259b5de8 R08: 2222222222222222 R09: 2222222222222222
> R10: 0000000000000000 R11: 2222222222222222 R12: ffff88010200000a
> R13: ffff88012afd0948 R14: ffff880125a2fd00 R15: ffff88012a2c1e00
> FS:  00007ff6506d8730(0000) GS:ffff880001b80000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f63c9959228 CR3: 0000000126baf000 CR4: 00000000000406e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process dlm_controld.pc (pid: 8167, threadinfo ffff8801259b4000, task
> ffff880125acae60)
> Stack:
>  0000000000000008 ffff880125a2fd00 ffff8801259b5e08 ffffffffa049e0d5
> <0> 0000000000000000 ffffffffa04c3550 ffff8801259b5e68 ffffffffa049f994
> <0> ffffffffa04c34e0 ffffffffa04c40a0 ffffffffa04c40a0 ffff880114dd9440
> Call Trace:
>  [<ffffffffa049e0d5>] unlink_group+0x25/0x50 [configfs]
>  [<ffffffffa049f994>] configfs_rmdir+0x244/0x2e0 [configfs]
>  [<ffffffff8111f9e0>] vfs_rmdir+0xb0/0x100
>  [<ffffffff811219c9>] do_rmdir+0xf9/0x110
>  [<ffffffff81111b58>] ? filp_close+0x58/0x90
>  [<ffffffff81121a21>] sys_rmdir+0x11/0x20
>  [<ffffffff8100242b>] system_call_fastpath+0x16/0x1b
> Code: 00 00 48 83 c4 08 5b c9 c3 0f 1f 80 00 00 00 00 0f 1f 84 00 00 00 00 00
> 55 48 89 e5 41 54 49 89 fc 53 48 8b 47 68 48 85 c0
>  00 00 00 e8 db ff ff ff 49 8b 44
> RIP  [<ffffffffa049e0c3>] unlink_group+0x13/0x50 [configfs]
>  RSP <ffff8801259b5dd8>
> ---[ end trace e701ef8bbb89eb8e ]---
>

On Wednesday, December 08, 2010, Nikola Ciprich wrote:
> AFAIK the problem hasn't been fixed yet..
> n.
> 
> On Sun, Dec 05, 2010 at 09:34:33PM +0100, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.35 and 2.6.36.
> > 
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.35 and 2.6.36.  Please verify if it still should
> > be listed and let the tracking team know (either way).
> > 
> > 
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=22782
> > Subject             : 2.6.36: general protection fault during lockfs
> lockspace removal
> > Submitter   : nik@linuxbox.cz <nik@linuxbox.cz>
> > Date                : 2010-11-12 12:05 (24 days old)

I don't know how to use the email interface, sorry Andrew.

I own configfs, so I'm adding myself to the Cc.  I've forwarded it to Dave too, as he owns fs/dlm.

Is this still an issue in 2.6.37 or 2.6.38-rc2?