On Thu, Mar 21, 2013 at 08:47:04PM +0000, Al Viro wrote:
> On Thu, Mar 21, 2013 at 04:36:39PM -0400, Dave Jones wrote:
> > at some point during the fuzz run, this happened..
> >
> > Mar 20 15:20:41 kernel: [ 7578.784674] fuse init (API version 7.21)
> > Mar 20 15:20:41 systemd[1]: Mounting FUSE Control File System...
> > Mar 20 15:20:41 systemd[1]: Mounted FUSE Control File System.
> >
> > I guess something wandered into /dev/fuse and did something. Not sure why
> > systemd reacted though...
>
> AFAICS, fuse uses d_materialise_unique() and d_splice_alias(), though, so
> it's not too likely source of that crap; there's no d_instantiate() calls
> at all and the sole d_add() is using an inode that has just been allocated,
> so it won't be creating aliases either...
here we go...
WARNING: at fs/namei.c:2335 lock_rename+0x156/0x160()
Hardware name: GA-MA78GM-S2H
Modules linked in: vmw_vsock_vmci_transport vmw_vmci vsock hidp cmtp kernelcapi
bnep caif_socket caif phonet nfnetlink rfcomm l2tp_ppp l2tp_netlink l2tp_core
rose pppoe pppox ppp_generic slhc llc2 netrom af_key can_raw af_rxrpc
scsi_transport_iscsi ipt_ULOG appletalk irda crc_ccitt decnet can_bcm can rds
atm x25 ipx p8023 psnap p8022 llc ax25 nfc af_802154 lockd sunrpc ip6t_REJECT
nf_conntrack_ipv6 nf_defrag_ipv6 xt_conntrack nf_conntrack ip6table_filter
ip6_tables snd_hda_codec_realtek snd_hda_intel snd_hda_codec btusb snd_pcm
bluetooth rfkill snd_page_alloc snd_timer microcode serio_raw pcspkr snd
edac_core soundcore r8169 mii vhost_net tun macvtap macvlan kvm_amd kvm radeon
backlight drm_kms_helper ttm
Pid: 5633, comm: trinity-child3 Not tainted 3.9.0-rc3+ #107
Call Trace:
[<ffffffff810450f5>] warn_slowpath_common+0x75/0xa0
[<ffffffff810451da>] warn_slowpath_null+0x1a/0x20
[<ffffffff811c6df6>] lock_rename+0x156/0x160
[<ffffffff811cd907>] sys_renameat+0x1f7/0x3b0
[<ffffffff810b33a2>] ? get_lock_stats+0x22/0x70
[<ffffffff810b6b95>] ? trace_hardirqs_on_caller+0x115/0x1a0
[<ffffffff810b6b95>] ? trace_hardirqs_on_caller+0x115/0x1a0
[<ffffffff8134a3ae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[<ffffffff816cd242>] system_call_fastpath+0x16/0x1b
---[ end trace 421592dfa22abfb0 ]---
p1=irda p2=irda
followed by...
=====================================
[ BUG: bad unlock balance detected! ]
3.9.0-rc3+ #107 Tainted: G W
-------------------------------------
trinity-child3/5633 is trying to release lock (&type->i_mutex_dir_key) at:
[<ffffffff816c104e>] mutex_unlock+0xe/0x10
but there are no more locks to release!
other info that might help us debug this:
1 lock on stack by trinity-child3/5633:
#0: blocked: (sb_writers#4){.+.+.+}, instance: ffff8801292d17d8, at:
[<ffffffff811df294>] mnt_want_write+0x24/0x50
stack backtrace:
Pid: 5633, comm: trinity-child3 Tainted: G W 3.9.0-rc3+ #107
Call Trace:
[<ffffffff816c104e>] ? mutex_unlock+0xe/0x10
[<ffffffff810b4e10>] print_unlock_imbalance_bug+0x100/0x110
[<ffffffff810b9417>] lock_release_non_nested+0x257/0x320
[<ffffffff810b3288>] ? trace_hardirqs_off_caller+0x28/0xc0
[<ffffffff816c104e>] ? mutex_unlock+0xe/0x10
[<ffffffff816c104e>] ? mutex_unlock+0xe/0x10
[<ffffffff810b9587>] lock_release+0xa7/0x310
[<ffffffff816c0f4a>] __mutex_unlock_slowpath+0x8a/0x180
[<ffffffff816c104e>] mutex_unlock+0xe/0x10
[<ffffffff811c67f1>] unlock_rename+0x41/0x60
[<ffffffff811cd996>] sys_renameat+0x286/0x3b0
[<ffffffff810b33a2>] ? get_lock_stats+0x22/0x70
[<ffffffff810b6b95>] ? trace_hardirqs_on_caller+0x115/0x1a0
[<ffffffff810b6b95>] ? trace_hardirqs_on_caller+0x115/0x1a0
[<ffffffff8134a3ae>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[<ffffffff816cd242>] system_call_fastpath+0x16/0x1b
--
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