linux-kernel - Re: 3.5-rc6 configfs BUG

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Message-ID: <20120715205845.GE18682@dhcp-172-17-9-228.mtv.corp.google.com>
Date:	Sun, 15 Jul 2012 13:58:46 -0700
From:	Joel Becker <jlbec@...lplan.org>
To:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: 3.5-rc6 configfs BUG_ON

On Wed, Jul 11, 2012 at 03:25:58PM -0400, Dave Jones wrote:
> kernel BUG at fs/configfs/dir.c:59!
> invalid opcode: 0000 [#1] PREEMPT SMP 
> CPU 4 
> Modules linked in:
>  ebtable_nat
>  nf_tproxy_core
>  hfsplus
>  ppp_synctty
>  async_tx
>  raid6_pq raid10 shpchp fakephp aer_inject ptp pps_core target_core_file target_core_iblock target_core_pscsi tcm_loop target_core_mod vga16fb sysimgblt fb_sys_fops syscopyarea vgastate output platform_lcd lcd sysfillrect n_r3964 n_gsm nozomi jsm serio_raw altera_ps2 input_polldev sparse_keymap uinput ipt_ULOG fuse tun binfmt_misc nfnetlink caif_socket caif phonet bluetooth rfkill can llc2 pppoe pppox ppp_generic slhc irda crc_ccitt rds af_key decnet rose x25 atm netrom appletalk ipx p8023 psnap p8022 llc ax25 ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables kvm_intel kvm crc32c_intel ghash_clmulni_intel microcode usb_debug pcspkr i2c_i801 e1000e nfsd nfs_acl auth_rpcgss lockd sunrpc i915 video i2c_algo_bit drm_kms_helper drm i2c_core [last unloaded: scsi_wait_scan]
> 
> Pid: 24175, comm: trinity-main Not tainted 3.5.0-rc6+ #102 
> RIP: 0010:[<ffffffff812562fb>]  [<ffffffff812562fb>] configfs_d_iput+0x8b/0xa0
> RSP: 0018:ffff88014325be08  EFLAGS: 00010282
> RAX: ffffffff81256270 RBX: ffff88014159cb98 RCX: 000000000000c7d0
> RDX: ffff880006bacd60 RSI: ffff880045f31540 RDI: ffff88000adf14d0
> RBP: ffff88014325be18 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000001 R11: 0000000000000000 R12: ffff880045f31540
> R13: ffff8801238f79d0 R14: 0000000000000001 R15: 00000000053f411b
> FS:  00007ff8895fa740(0000) GS:ffff880148400000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000038e4e10310 CR3: 0000000140c57000 CR4: 00000000001407e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process trinity-main (pid: 24175, threadinfo ffff88014325a000, task ffff880006bacd60)
> Stack:
>  ffff88000adf14d0 ffff880045f31540 ffff88014325be48 ffffffff811ec74f
>  ffff88000adf14d0 ffff8801238f79d0 ffff880045f31540 ffff88000adf1530
>  ffff88014325be78 ffffffff811ec8a2 ffff88014325beb8 00000000053f40b0
> Call Trace:
>  [<ffffffff811ec74f>] d_kill+0xaf/0x120
>  [<ffffffff811ec8a2>] dput+0xe2/0x1d0
>  [<ffffffff811dfaea>] path_put+0x1a/0x30
>  [<ffffffff811d9705>] vfs_fstatat+0x55/0x70
>  [<ffffffff811d973e>] vfs_lstat+0x1e/0x20
>  [<ffffffff811d99ca>] sys_newlstat+0x1a/0x40
>  [<ffffffff81696aed>] system_call_fastpath+0x1a/0x1f
> Code: f6 43 40 01 75 eb 48 8b 7b 50 e8 41 4d f6 ff 48 8b 3d c2 bf 7f 01 48 89 de e8 a2 52 f6 ff 4c 89 e7 e8 1a b5 f9 ff 5b 41 5c 5d c3 <0f> 0b be 9c 00 00 00 48 c7 c7 30 a2 9e 81 e8 42 2e e1 ff eb a7 
> RIP  [<ffffffff812562fb>] configfs_d_iput+0x8b/0xa0
>  RSP <ffff88014325be08>
> ---[ end trace 65e130035db36f7d ]---
> 
>   58         if (sd) {
>   59                 BUG_ON(sd->s_dentry != dentry);
> 

Dave,
	What were you doing at the time?  Is this ocfs2, dlm, target, or
what?

Joel


-- 

"Drake!  We're LEAVING!"

			http://www.jlbec.org/
			jlbec@...lplan.org
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