android_kernel_oneplus_msm8998/drivers/scsi
James Bottomley a258a959fc scsi: fix soft lockup in scsi_remove_target() on module removal
commit 90a88d6ef88edcfc4f644dddc7eef4ea41bccf8b upstream.

This softlockup is currently happening:

[  444.088002] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:1:29]
[  444.088002] Modules linked in: lpfc(-) qla2x00tgt(O) qla2xxx_scst(O) scst_vdisk(O) scsi_transport_fc libcrc32c scst(O) dlm configfs nfsd lockd grace nfs_acl auth_rpcgss sunrpc ed
d snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device dm_mod iTCO_wdt snd_hda_codec_realtek snd_hda_codec_generic gpio_ich iTCO_vendor_support ppdev snd_hda_intel snd_hda_codec snd_hda
_core snd_hwdep tg3 snd_pcm snd_timer libphy lpc_ich parport_pc ptp acpi_cpufreq snd pps_core fjes parport i2c_i801 ehci_pci tpm_tis tpm sr_mod cdrom soundcore floppy hwmon sg 8250_
fintek pcspkr i915 drm_kms_helper uhci_hcd ehci_hcd drm fb_sys_fops sysimgblt sysfillrect syscopyarea i2c_algo_bit usbcore button video usb_common fan ata_generic ata_piix libata th
ermal
[  444.088002] CPU: 1 PID: 29 Comm: kworker/1:1 Tainted: G           O    4.4.0-rc5-2.g1e923a3-default #1
[  444.088002] Hardware name: FUJITSU SIEMENS ESPRIMO E           /D2164-A1, BIOS 5.00 R1.10.2164.A1               05/08/2006
[  444.088002] Workqueue: fc_wq_4 fc_rport_final_delete [scsi_transport_fc]
[  444.088002] task: f6266ec0 ti: f6268000 task.ti: f6268000
[  444.088002] EIP: 0060:[<c07e7044>] EFLAGS: 00000286 CPU: 1
[  444.088002] EIP is at _raw_spin_unlock_irqrestore+0x14/0x20
[  444.088002] EAX: 00000286 EBX: f20d3800 ECX: 00000002 EDX: 00000286
[  444.088002] ESI: f50ba800 EDI: f2146848 EBP: f6269ec8 ESP: f6269ec8
[  444.088002]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[  444.088002] CR0: 8005003b CR2: 08f96600 CR3: 363ae000 CR4: 000006d0
[  444.088002] Stack:
[  444.088002]  f6269eec c066b0f7 00000286 f2146848 f50ba808 f50ba800 f50ba800 f2146a90
[  444.088002]  f2146848 f6269f08 f8f0a4ed f3141000 f2146800 f2146a90 f619fa00 00000040
[  444.088002]  f6269f40 c026cb25 00000001 166c6392 00000061 f6757140 f6136340 00000004
[  444.088002] Call Trace:
[  444.088002]  [<c066b0f7>] scsi_remove_target+0x167/0x1c0
[  444.088002]  [<f8f0a4ed>] fc_rport_final_delete+0x9d/0x1e0 [scsi_transport_fc]
[  444.088002]  [<c026cb25>] process_one_work+0x155/0x3e0
[  444.088002]  [<c026cde7>] worker_thread+0x37/0x490
[  444.088002]  [<c027214b>] kthread+0x9b/0xb0
[  444.088002]  [<c07e72c1>] ret_from_kernel_thread+0x21/0x40

What appears to be happening is that something has pinned the target
so it can't go into STARGET_DEL via final release and the loop in
scsi_remove_target spins endlessly until that happens.

The fix for this soft lockup is to not keep looping over a device that
we've called remove on but which hasn't gone into DEL state.  This
patch will retain a simplistic memory of the last target and not keep
looping over it.

Reported-by: Sebastian Herbszt <herbszt@gmx.de>
Tested-by: Sebastian Herbszt <herbszt@gmx.de>
Fixes: 4099819356
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-25 12:01:17 -08:00
..
aacraid aacraid: Update driver version 2015-11-09 16:12:56 -08:00
aic7xxx scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
aic94xx SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
arcmsr libnvdimm for 4.3: 2015-09-08 14:35:59 -07:00
arm scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
be2iscsi SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
bfa scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
bnx2fc bnx2fc: Update version number to 2.9.6. 2015-11-09 17:32:34 -08:00
bnx2i bnx2i: Fix call trace while device reset 2015-06-02 17:15:24 -07:00
csiostor scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
cxgbi drivers/scsi/cxgbi: fix build with EXTRA_CFLAGS 2015-11-09 15:11:24 -08:00
cxlflash cxlflash: Fix to avoid bypassing context cleanup 2015-10-30 17:25:34 +09:00
device_handler scsi_dh_rdac: always retry MODE SELECT on command lock violation 2016-02-25 12:01:16 -08:00
dpt
esas2r scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
fcoe scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
fnic scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
ibmvscsi SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
isci SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
libfc libfc: Use the correct function name in kernel-doc comment. 2015-11-09 17:15:52 -08:00
libsas Merge branch 'for-4.0-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2015-03-24 17:08:29 -07:00
lpfc scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
megaraid SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
mpt3sas Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
mvsas Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
osd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
pcmcia scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
pm8001 SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
qla2xxx SCSI fixes on 20151205 2015-12-06 08:02:25 -08:00
qla4xxx SCSI misc on 20151113 2015-11-13 20:35:54 -08:00
snic SCSI misc on 20151113 2015-11-13 20:35:54 -08:00
sym53c8xx_2 scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ufs SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
.gitignore
3w-9xxx.c 3w-9xxx: don't unmap bounce buffered commands 2015-10-07 10:24:48 -07:00
3w-9xxx.h 3w-9xxx: fix command completion race 2015-04-27 10:10:19 -07:00
3w-sas.c 3w-sas: fix command completion race 2015-04-27 10:04:39 -07:00
3w-sas.h 3w-sas: fix command completion race 2015-04-27 10:04:39 -07:00
3w-xxxx.c 3w-xxxx: fix command completion race 2015-04-27 10:05:55 -07:00
3w-xxxx.h 3w-xxxx: fix command completion race 2015-04-27 10:05:55 -07:00
53c700.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
53c700.h
53c700.scr
53c700_d.h_shipped
a100u2w.c scsi: a100u2w: trivial typo in printk 2015-08-07 15:03:42 +02:00
a100u2w.h
a2091.c zorro: ZTWO_VADDR() should return "void __iomem *" 2013-11-26 11:09:07 +01:00
a2091.h
a3000.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
a3000.h
a4000t.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
advansys.c Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
aha152x.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha152x.h
aha1542.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha1542.h aha1542: fix include guard and remove useless changelog 2015-04-09 18:08:31 -07:00
aha1740.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
aha1740.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
am53c974.c am53c974: Fix crash during modprobe 2015-04-17 10:13:56 -07:00
atari_NCR5380.c ncr5380: Harmonize jiffies conversion with msecs_to_jiffies 2015-03-09 10:45:26 -04:00
atari_scsi.c ncr5380: Drop owner assignment from platform_drivers 2015-03-09 07:18:14 -04:00
atp870u.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
atp870u.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
BusLogic.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
BusLogic.h
bvme6000_scsi.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
ch.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
constants.c scsi: Conditionally compile in constants.c 2015-01-09 15:44:31 +01:00
dc395x.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
dc395x.h
dmx3191d.c dmx3191d: Use NO_IRQ 2014-11-20 09:11:11 +01:00
dpt_i2o.c x86/vm86: Clean up vm86.h includes 2015-07-31 13:31:10 +02:00
dpti.h scsi: use 64-bit LUNs 2014-07-17 22:07:37 +02:00
dtc.c ncr5380: Drop legacy scsi.h include 2014-11-20 09:11:10 +01:00
dtc.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
eata.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
eata_generic.h
eata_pio.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
eata_pio.h
esp_scsi.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
esp_scsi.h esp_scsi: correctly detect am53c974 2014-11-24 16:13:16 +01:00
fdomain.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
fdomain.h
FlashPoint.c FlashPoint: fix build warning 2015-11-09 16:32:14 -08:00
g_NCR5380.c ncr5380: Harmonize jiffies conversion with msecs_to_jiffies 2015-03-09 10:45:26 -04:00
g_NCR5380.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
g_NCR5380_mmio.c
gdth.c scsi: rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16 2014-11-24 20:01:40 +01:00
gdth.h
gdth_ioctl.h
gdth_proc.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
gdth_proc.h
gvp11.c zorro: ZTWO_VADDR() should return "void __iomem *" 2013-11-26 11:09:07 +01:00
gvp11.h
hosts.c Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
hpsa.c Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
hpsa.h hpsa: add in sas transport class 2015-11-09 12:39:28 -05:00
hpsa_cmd.h hpsa: add in sas transport class 2015-11-09 12:39:28 -05:00
hptiop.c hptiop: Support HighPoint RR36xx HBAs and Support SAS tape and SAS media changer 2015-08-12 13:14:57 -07:00
hptiop.h hptiop: Support HighPoint RR36xx HBAs and Support SAS tape and SAS media changer 2015-08-12 13:14:57 -07:00
imm.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
imm.h
in2000.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
in2000.h
initio.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
initio.h
ipr.c SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
ipr.h ipr: Driver version 2.6.3. 2015-11-09 19:32:41 -05:00
ips.c ips: remove pointless #warning 2015-06-02 17:24:54 -07:00
ips.h
iscsi_boot_sysfs.c [SCSI] iscsi_boot_sysfs: Fix a memory leak in iscsi_boot_destroy_kset() 2014-03-15 10:19:19 -07:00
iscsi_tcp.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
iscsi_tcp.h net: Fix use after free by removing length arg from sk_data_ready callbacks. 2014-04-11 16:15:36 -04:00
jazz_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
Kconfig Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
lasi700.c
libiscsi.c libiscsi: Fix iscsi_check_transport_timeouts possible infinite loop 2015-09-17 07:25:02 -07:00
libiscsi_tcp.c [SCSI] libiscsi: Reduce locking contention in fast path 2014-03-15 10:19:18 -07:00
mac53c94.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
mac53c94.h
mac_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
mac_scsi.c ncr5380: Drop owner assignment from platform_drivers 2015-03-09 07:18:14 -04:00
Makefile mpt3sas: Single driver module which supports both SAS 2.0 & SAS 3.0 HBAs 2015-11-11 19:50:11 -05:00
megaraid.c megaraid : use dev_printk when possible 2015-08-26 07:23:04 -07:00
megaraid.h [SCSI] megaraid: simplify internal command handling 2014-03-27 08:26:31 -07:00
mesh.c powerpc: Move Power Macintosh drivers to generic byteswappers 2015-03-23 14:29:40 +11:00
mesh.h
mvme16x_scsi.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
mvme147.c
mvme147.h
mvumi.c mvumi: 64bit value for seconds_since1970 2015-11-11 20:45:23 -05:00
mvumi.h
ncr53c8xx.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ncr53c8xx.h scsi: Remove CONFIG_SCSI_MULTI_LUN 2014-07-17 22:07:35 +02:00
NCR53c406a.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
NCR5380.c ncr5380: Harmonize jiffies conversion with msecs_to_jiffies 2015-03-09 10:45:26 -04:00
NCR5380.h atari_NCR5380: Move static co-routine variables to host data 2014-11-20 09:11:20 +01:00
NCR_D700.c
NCR_D700.h
NCR_Q720.c
NCR_Q720.h
nsp32.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
nsp32.h
nsp32_debug.c
nsp32_io.h
osst.c scsi: remove scsi_driver owner field 2014-11-24 20:01:28 +01:00
osst.h
osst_detect.h
osst_options.h
pas16.c ncr5380: Drop legacy scsi.h include 2014-11-20 09:11:10 +01:00
pas16.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
pmcraid.c SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
pmcraid.h
ppa.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
ppa.h
ps3rom.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qla1280.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qla1280.h
qlogicfas.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qlogicfas408.c
qlogicfas408.h
qlogicpti.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
qlogicpti.h
raid_class.c
script_asm.pl
scsi.c scsi: use host wide tags by default 2015-11-09 17:11:57 -08:00
scsi.h
scsi_common.c scsi: Protect against buffer possible overflow in scsi_set_sense_information 2015-07-23 22:53:05 -07:00
scsi_debug.c scsi_debug: fix prevent_allow+verify regressions 2015-11-25 21:38:53 -05:00
scsi_devinfo.c SCSI: Add Marvell Console to VPD blacklist 2016-02-25 12:01:16 -08:00
scsi_dh.c scsi_dh: don't try to load a device handler during async probing 2015-10-27 15:03:31 +09:00
scsi_error.c mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM 2015-11-06 17:50:42 -08:00
scsi_ioctl.c scsi: return EAGAIN when resetting a device under EH 2014-11-12 11:16:12 +01:00
scsi_lib.c mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM 2015-11-06 17:50:42 -08:00
scsi_lib_dma.c
scsi_logging.c scsi_logging: return void for dev_printk() functions 2015-02-04 08:00:24 -08:00
scsi_logging.h scsi: simplify scsi_log_(send|completion) 2014-11-12 11:16:05 +01:00
scsi_module.c
scsi_netlink.c net: Use netlink_ns_capable to verify the permisions of netlink messages 2014-04-24 13:44:54 -04:00
scsi_pm.c Revert "SCSI: Fix NULL pointer dereference in runtime PM" 2015-12-10 12:24:44 -05:00
scsi_priv.h scsi_dh: fix use-after-free when removing scsi device 2015-10-27 11:22:37 +09:00
scsi_proc.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
scsi_sas_internal.h
scsi_scan.c Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
scsi_sysctl.c scsi: convert use of typedef ctl_table to struct ctl_table 2014-06-06 16:08:16 -07:00
scsi_sysfs.c scsi: fix soft lockup in scsi_remove_target() on module removal 2016-02-25 12:01:17 -08:00
scsi_trace.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
scsi_transport_api.h
scsi_transport_fc.c scsi_transport_fc: Add support for 25Gbit speed 2015-04-10 07:40:32 -07:00
scsi_transport_iscsi.c SCSI misc on 20150901 2015-09-02 12:22:54 -07:00
scsi_transport_sas.c scsi_transport_sas: Remove check for SAS expander when querying bay/enclosure IDs. 2015-09-06 11:13:41 -07:00
scsi_transport_spi.c [SCSI] Fix printk typos in drivers/scsi 2015-08-07 14:28:45 +02:00
scsi_transport_srp.c IB/srp: Avoid using uninitialized variable 2015-07-14 13:20:09 -04:00
scsi_typedefs.h
scsicam.c scsi: PC partition tables are little endian 2014-11-12 11:15:54 +01:00
sd.c SCSI: fix crashes in sd and sr runtime PM 2016-02-25 12:01:16 -08:00
sd.h block/sd: Fix device-imposed transfer length limits 2015-11-25 21:38:58 -05:00
sd_dif.c block: Consolidate static integrity profile properties 2015-10-21 14:42:38 -06:00
ses.c ses: fix additional element traversal bug 2015-12-11 11:05:57 -08:00
sg.c drivers/scsi/sg.c: mark VMA as VM_IO to prevent migration 2016-02-25 12:01:16 -08:00
sgiwd93.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sim710.c
sni_53c710.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sr.c SCSI: fix crashes in sd and sr runtime PM 2016-02-25 12:01:16 -08:00
sr.h scsi: introduce sdev_prefix_printk() 2014-11-12 11:15:57 +01:00
sr_ioctl.c sr: reduce debug noise in sr_do_ioctl 2015-01-20 19:43:24 +01:00
sr_vendor.c scsi: Implement sr_printk() 2014-07-17 22:07:39 +02:00
st.c Merge branch 'mkp-fixes' into fixes 2015-12-03 09:32:33 -08:00
st.h st: implement tape statistics 2015-06-02 08:03:25 -07:00
st_options.h
stex.c stex: Remove use of struct timeval 2015-11-09 17:42:19 -08:00
storvsc_drv.c scsi: storvsc: Fix a bug in the handling of SRB status flags 2015-11-09 16:29:42 -08:00
sun3_scsi.c ncr5380: Drop owner assignment from platform_drivers 2015-03-09 07:18:14 -04:00
sun3_scsi.h sun3_scsi: Move macro definitions 2014-11-20 09:11:15 +01:00
sun3_scsi_vme.c scsi/NCR5380: merge sun3_scsi_vme.c into sun3_scsi.c 2014-05-28 12:16:28 +02:00
sun3x_esp.c arch, drivers: don't include <asm/io.h> directly, use <linux/io.h> instead 2015-08-10 23:07:05 -04:00
sun_esp.c scsi: drop owner assignment from platform_drivers 2014-10-20 16:21:33 +02:00
sym53c416.c scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
sym53c416.h
t128.c ncr5380: Drop legacy scsi.h include 2014-11-20 09:11:10 +01:00
t128.h ncr5380: Remove *_RELEASE macros 2014-11-20 09:11:10 +01:00
u14-34f.c scsi: drop reason argument from ->change_queue_depth 2014-11-24 14:45:27 +01:00
ultrastor.c
ultrastor.h
virtio_scsi.c virtio/vhost: fixes for 4.2 2015-07-23 13:07:04 -07:00
vmw_pvscsi.c vmw_pscsi: simplify ->change_queue_depth 2014-11-24 14:45:28 +01:00
vmw_pvscsi.h PCI: Move PCI_VENDOR_ID_VMWARE to pci_ids.h 2014-09-24 11:52:09 -06:00
wd33c93.c scsi: print single-character strings with seq_putc 2015-02-02 09:57:46 -08:00
wd33c93.h
wd719x.c [SCSI] Fix printk typos in drivers/scsi 2015-08-07 14:28:45 +02:00
wd719x.h scsi: Do not set cmd_per_lun to 1 in the host template 2015-05-31 18:06:28 -07:00
wd7000.c scsi: replace seq_printf with seq_puts 2015-02-02 09:57:45 -08:00
xen-scsifront.c xen: Use correctly the Xen memory terminologies 2015-09-08 18:03:49 +01:00
zalon.c
zorro7xx.c zorro: ZTWO_VADDR() should return "void __iomem *" 2013-11-26 11:09:07 +01:00