Bug 1495164 - CacheFiles: Error: Unexpected object collision ( kernel BUG at fs/cachefiles/namei.c:198! )
Summary: CacheFiles: Error: Unexpected object collision ( kernel BUG at fs/cachefiles/...
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: cachefilesd
Version: 26
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: David Howells
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-09-25 11:25 UTC by Tore H. Larsen
Modified: 2018-05-29 12:21 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2018-05-29 12:21:27 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Tore H. Larsen 2017-09-25 11:25:29 UTC
Description of problem:

When creating bootable usb sticks with ISO residing on CIFS mount, kernel oops as seen below.

$ sudo unetbootin

and then selecting an ISO image on a CIFS share

Version-Release number of selected component (if applicable):

cachefilesd-0.10.10-1.fc26.x86_64
samba-client-4.6.8-0.fc26.x86_64

How reproducible:

Solid, on 2nd USB stick created after reboot.

Steps to Reproduce:
1. sudo unetbootin
2. Pick file on CIFS filesystem (Windows 2008 SR2 server)
3. Happeneds when creating 2nd USB stick

Actual results:
[16793.526043] usb-storage 3-2:1.0: USB Mass Storage device detected
[16793.526363] scsi host8: usb-storage 3-2:1.0
[16794.550994] scsi 8:0:0:0: Direct-Access     General  UDisk            5.00 PQ: 0 ANSI: 2
[16794.552119] sd 8:0:0:0: [sde] 7864320 512-byte logical blocks: (4.03 GB/3.75 GiB)
[16794.552271] sd 8:0:0:0: [sde] Write Protect is off
[16794.552274] sd 8:0:0:0: [sde] Mode Sense: 0b 00 00 08
[16794.552459] sd 8:0:0:0: [sde] No Caching mode page found
[16794.552467] sd 8:0:0:0: [sde] Assuming drive cache: write through
[16794.552474] sd 8:0:0:0: Attached scsi generic sg3 type 0
[16794.554410]  sde:
[16794.555287] sd 8:0:0:0: [sde] Attached SCSI removable disk
[17055.952130] CacheFiles: 
[17055.952137] CacheFiles: Error: Overlong wait for old active object to go away
[17055.952141] CacheFiles: object: OBJ2a2
[17055.952144] CacheFiles: objstate=LOOK_UP_OBJECT fl=8 wbusy=2 ev=0[0]
[17055.952147] CacheFiles: ops=0 inp=0 exc=0
[17055.952149] CacheFiles: parent=ffff8d3b579aec00
[17055.952152] CacheFiles: cookie=ffff8d3ab5f91370 [pr=ffff8d37d87586e0 nd=ffff8d377fab5db0 fl=27]
[17055.952155] CacheFiles: key=[8] '1a22010000000400'
[17055.952162] CacheFiles: xobject: OBJ2a1
[17055.952165] CacheFiles: xobjstate=DROP_OBJECT fl=70 wbusy=2 ev=10[0]
[17055.952167] CacheFiles: xops=0 inp=0 exc=0
[17055.952169] CacheFiles: xparent=ffff8d3b579aec00
[17055.952172] CacheFiles: xcookie=ffff8d3a3a284c60 [pr=ffff8d37d87586e0 nd=          (null) fl=10]
[17115.989069] CacheFiles: 
[17115.989074] CacheFiles: Error: Overlong wait for old active object to go away
[17115.989078] CacheFiles: object: OBJ2a2
[17115.989082] CacheFiles: objstate=LOOK_UP_OBJECT fl=8 wbusy=2 ev=0[0]
[17115.989085] CacheFiles: ops=0 inp=0 exc=0
[17115.989088] CacheFiles: parent=ffff8d3b579aec00
[17115.989092] CacheFiles: cookie=ffff8d3ab5f91370 [pr=ffff8d37d87586e0 nd=ffff8d377fab5db0 fl=27]
[17115.989095] CacheFiles: key=[8] '1a22010000000400'
[17115.989104] CacheFiles: xobject: OBJ2a1
[17115.989107] CacheFiles: xobjstate=DROP_OBJECT fl=70 wbusy=2 ev=10[0]
[17115.989110] CacheFiles: xops=0 inp=0 exc=0
[17115.989112] CacheFiles: xparent=ffff8d3b579aec00
[17115.989116] CacheFiles: xcookie=ffff8d3a3a284c60 [pr=ffff8d37d87586e0 nd=          (null) fl=10]
[17176.027004] CacheFiles: 
[17176.027009] CacheFiles: Error: Overlong wait for old active object to go away
[17176.027012] CacheFiles: object: OBJ2a2
[17176.027015] CacheFiles: objstate=LOOK_UP_OBJECT fl=8 wbusy=2 ev=0[0]
[17176.027016] CacheFiles: ops=0 inp=0 exc=0
[17176.027018] CacheFiles: parent=ffff8d3b579aec00
[17176.027020] CacheFiles: cookie=ffff8d3ab5f91370 [pr=ffff8d37d87586e0 nd=ffff8d377fab5db0 fl=27]
[17176.027022] CacheFiles: key=[8] '1a22010000000400'
[17176.027028] CacheFiles: xobject: OBJ2a1
[17176.027030] CacheFiles: xobjstate=DROP_OBJECT fl=70 wbusy=2 ev=10[0]
[17176.027032] CacheFiles: xops=0 inp=0 exc=0
[17176.027033] CacheFiles: xparent=ffff8d3b579aec00
[17176.027036] CacheFiles: xcookie=ffff8d3a3a284c60 [pr=ffff8d37d87586e0 nd=          (null) fl=10]
[17403.227381] CacheFiles: 
[17403.227387] CacheFiles: Error: Unexpected object collision
[17403.227390] CacheFiles: object: OBJ43b
[17403.227394] CacheFiles: objstate=LOOK_UP_OBJECT fl=8 wbusy=2 ev=0[0]
[17403.227397] CacheFiles: ops=0 inp=0 exc=0
[17403.227400] CacheFiles: parent=ffff8d3b579aec00
[17403.227404] CacheFiles: cookie=ffff8d3776b3d688 [pr=ffff8d37d87586e0 nd=ffff8d377fab5db0 fl=27]
[17403.227406] CacheFiles: key=[8] '1a22010000000400'
[17403.227415] CacheFiles: xobject: OBJ43a
[17403.227418] CacheFiles: xobjstate=DROP_OBJECT fl=70 wbusy=2 ev=10[0]
[17403.227421] CacheFiles: xops=0 inp=0 exc=0
[17403.227423] CacheFiles: xparent=ffff8d3b579aec00
[17403.227427] CacheFiles: xcookie=ffff8d3b239802c0 [pr=ffff8d37d87586e0 nd=          (null) fl=10]
[17403.227466] ------------[ cut here ]------------
[17403.227471] kernel BUG at fs/cachefiles/namei.c:198!
[17403.227475] invalid opcode: 0000 [#1] SMP
[17403.227476] Modules linked in: vfat fat md4 uas usb_storage hid_logitech_hidpp hid_logitech_dj rfcomm vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) xt_CHECKSUM nvidia(POE) drm tun nls_utf8 cifs dns_resolver ccm ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_addrtype br_netfilter nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack dm_thin_pool dm_persistent_data dm_bio_prison loop ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_raw iptable_security ebtable_filter ebtables ip6table_filter ip6_tables fuse vmw_vsock_vmci_transport vsock
[17403.227523]  vmw_vmci cachefiles fscache bnep sunrpc xfs libcrc32c iTCO_wdt iTCO_vendor_support ppdev mei_wdt intel_powerclamp coretemp kvm_intel uvcvideo kvm qcserial usb_wwan videobuf2_vmalloc btusb videobuf2_memops btrtl videobuf2_v4l2 videobuf2_core btbcm btintel bluetooth snd_hda_codec_hdmi videodev irqbypass intel_cstate media ecdh_generic intel_uncore arc4 iwldvm mac80211 snd_hda_codec_conexant snd_hda_codec_generic snd_hda_intel joydev iwlwifi snd_hda_codec i7core_edac cfg80211 snd_hda_core snd_hwdep thinkpad_acpi i2c_i801 snd_seq lpc_ich snd_seq_device snd_pcm snd_timer snd soundcore acpi_cpufreq rfkill parport_pc parport mei_me mei shpchp tpm_tis tpm_tis_core tpm binfmt_misc mxm_wmi sdhci_pci sdhci firewire_ohci crc32c_intel e1000e serio_raw mmc_core firewire_core crc_itu_t ptp pps_core
[17403.227577]  video wmi ecryptfs
[17403.227583] CPU: 4 PID: 14075 Comm: kworker/u16:4 Tainted: P           OE   4.12.14-300.fc26.x86_64 #1
[17403.227585] Hardware name: LENOVO 43892DG/43892DG, BIOS 6NET76WW (1.37 ) 02/24/2011
[17403.227594] Workqueue: fscache_object fscache_object_work_func [fscache]
[17403.227597] task: ffff8d386c5d0000 task.stack: ffffb92b09264000
[17403.227602] RIP: 0010:cachefiles_walk_to_object+0x799/0x870 [cachefiles]
[17403.227605] RSP: 0018:ffffb92b09267d10 EFLAGS: 00010202
[17403.227607] RAX: ffff8d39b879da01 RBX: ffff8d3903e3f1c0 RCX: 000000000026e9ee
[17403.227609] RDX: 000000000026e9ed RSI: ffff8d3b7fd1d760 RDI: ffff8d3b6f003080
[17403.227611] RBP: ffffb92b09267dc0 R08: 000000000001d760 R09: ffffffffc07cebd0
[17403.227613] R10: fffffd2209e1e700 R11: ffffffff9b311b6d R12: ffff8d386c58ed80
[17403.227615] R13: ffff8d3903e3f080 R14: ffff8d3a31d82f00 R15: ffff8d386c58eea8
[17403.227618] FS:  0000000000000000(0000) GS:ffff8d3b7fd00000(0000) knlGS:0000000000000000
[17403.227620] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[17403.227622] CR2: 00007f8488a21a08 CR3: 0000000303e09000 CR4: 00000000000006e0
[17403.227624] Call Trace:
[17403.227631]  ? update_curr+0xf2/0x1c0
[17403.227635]  cachefiles_lookup_object+0x4d/0xe0 [cachefiles]
[17403.227641]  fscache_look_up_object+0xb7/0x1b0 [fscache]
[17403.227647]  ? fscache_parent_ready+0x2b/0x70 [fscache]
[17403.227653]  fscache_object_work_func+0x60/0x1e0 [fscache]
[17403.227657]  process_one_work+0x193/0x3c0
[17403.227661]  worker_thread+0x4a/0x3a0
[17403.227664]  kthread+0x125/0x140
[17403.227667]  ? process_one_work+0x3c0/0x3c0
[17403.227670]  ? kthread_park+0x60/0x60
[17403.227675]  ret_from_fork+0x25/0x30
[17403.227677] Code: d9 0f 0b e8 da 7f 8d d9 48 c7 c7 ef f5 7c c0 e8 af 7c 9f d9 48 c7 c7 78 01 7d c0 e8 a3 7c 9f d9 4c 89 ee 4c 89 e7 e8 e4 28 00 00 <0f> 0b 0f 0b 48 c7 c7 48 01 7d c0 e8 88 7c 9f d9 31 f6 4c 89 e7 
[17403.227716] RIP: cachefiles_walk_to_object+0x799/0x870 [cachefiles] RSP: ffffb92b09267d10
[17403.227719] ---[ end trace 6d75494e99615075 ]---

and then you can create a new one.

Expected results:

- Should be able to create any number of bootable USB 

Additional info:

Ref bugzilla bug # 1210730

Comment 1 Fedora End Of Life 2018-05-03 08:01:23 UTC
This message is a reminder that Fedora 26 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
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bug reports from releases that are no longer maintained. At that time
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Comment 2 Fedora End Of Life 2018-05-29 12:21:27 UTC
Fedora 26 changed to end-of-life (EOL) status on 2018-05-29. Fedora 26
is no longer maintained, which means that it will not receive any
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