Public bug reported:
I have some problems with btrfs filesystem. This time an error occurred
just after the start up and the filesystem has been mounted as read
only.
Kernel log:
[ 35.214387] ------------[ cut here ]------------
[ 35.214406] WARNING: CPU: 5 PID: 3124 at
/build/linux-oXTOqc/linux-4.4.0/fs/btrfs/inode.c:4485
btrfs_truncate_inode_items+0xc1d/0xd20 [btrfs]()
[ 35.214407] BTRFS: Transaction aborted (error -11)
[ 35.214408] Modules linked in: xt_addrtype br_netfilter xt_CHECKSUM
iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4
nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT
nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter
ip6_tables iptable_filter ip_tables x_tables pci_stub vboxpci(OE)
vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) binfmt_misc intel_rapl
x86_pkg_temp_thermal input_leds intel_powerclamp coretemp crct10dif_pclmul
snd_hda_codec_realtek crc32_pclmul snd_hda_codec_generic snd_hda_codec_hdmi
snd_soc_rt5640 snd_soc_ssm4567 snd_soc_rl6231 snd_hda_intel aesni_intel
snd_soc_core aes_x86_64 snd_hda_codec lrw gf128mul glue_helper snd_hda_core
snd_compress ablk_helper ac97_bus cryptd snd_hwdep snd_pcm_dmaengine serio_raw
[ 35.214436] mei_me snd_seq_midi snd_seq_midi_event lpc_ich mei snd_pcm
snd_rawmidi snd_seq shpchp snd_seq_device snd_timer snd 8250_fintek elan_i2c
soundcore i2c_designware_platform 8250_dw dw_dmac dw_dmac_core
i2c_designware_core spi_pxa2xx_platform snd_soc_sst_acpi mac_hid acpi_pad
kvm_intel kvm irqbypass parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq
hid_generic usbhid amdkfd amd_iommu_v2 radeon i915 ttm i2c_algo_bit
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse ahci drm
r8169 libahci mii i2c_hid sdhci_acpi sdhci video hid fjes
[ 35.214462] CPU: 5 PID: 3124 Comm: SimpleCacheWork Tainted: G OE
4.4.0-24-generic #43-Ubuntu
[ 35.214463] Hardware name: Gigabyte Technology Co., Ltd. Z97-HD3/Z97-HD3,
BIOS F6 06/11/2014
[ 35.214465] 0000000000000286 00000000dd8b3f1e ffff8803e71f3c18
ffffffff813eab23
[ 35.214466] ffff8803e71f3c60 ffffffffc05c4220 ffff8803e71f3c50
ffffffff810810d2
[ 35.214468] ffff880414f91000 ffff8800b8745b58 0000000000000000
ffff8800b85126c0
[ 35.214470] Call Trace:
[ 35.214475] [<ffffffff813eab23>] dump_stack+0x63/0x90
[ 35.214478] [<ffffffff810810d2>] warn_slowpath_common+0x82/0xc0
[ 35.214480] [<ffffffff8108116c>] warn_slowpath_fmt+0x5c/0x80
[ 35.214492] [<ffffffffc05a3a4f>] ? ulist_free+0x1f/0x30 [btrfs]
[ 35.214504] [<ffffffffc054a4fd>] btrfs_truncate_inode_items+0xc1d/0xd20
[btrfs]
[ 35.214507] [<ffffffff810c3b80>] ? wake_atomic_t_function+0x60/0x60
[ 35.214518] [<ffffffffc054a6e2>] btrfs_truncate+0xe2/0x2c0 [btrfs]
[ 35.214529] [<ffffffffc054af85>] btrfs_setattr+0x1e5/0x360 [btrfs]
[ 35.214531] [<ffffffff81229d35>] notify_change+0x235/0x360
[ 35.214533] [<ffffffff81209a75>] do_truncate+0x75/0xc0
[ 35.214535] [<ffffffff8120aa29>] do_sys_ftruncate.constprop.13+0x119/0x170
[ 35.214537] [<ffffffff8120ac2e>] SyS_ftruncate+0xe/0x10
[ 35.214540] [<ffffffff81825bf2>] entry_SYSCALL_64_fastpath+0x16/0x71
[ 35.214542] ---[ end trace 619f33d132d16603 ]---
[ 35.214544] BTRFS warning (device sdb3): btrfs_truncate_inode_items:4485:
Aborting unused transaction(unknown).
[ 35.222150] BTRFS: error (device sdb3) in btrfs_truncate_inode_items:4485:
errno=-11 unknown
[ 35.222153] BTRFS info (device sdb3): forced readonly
[ 374.383753] audit: type=1400 audit(1466590347.068:31): apparmor="DENIED"
operation="capable" profile="/usr/sbin/cupsd" pid=884 comm="cupsd"
capability=12 capname="net_admin"
[ 374.383768] audit: type=1400 audit(1466590347.068:32): apparmor="DENIED"
operation="sendmsg" profile="/usr/sbin/cupsd"
name="/run/systemd/journal/socket" pid=884 comm="cupsd" requested_mask="w"
denied_mask="w" fsuid=0 ouid=0
[ 374.383778] audit: type=1400 audit(1466590347.068:33): apparmor="DENIED"
operation="sendmsg" profile="/usr/sbin/cupsd"
name="/run/systemd/journal/socket" pid=884 comm="cupsd" requested_mask="w"
denied_mask="w" fsuid=0 ouid=0
[ 374.383825] audit: type=1400 audit(1466590347.068:34): apparmor="DENIED"
operation="sendmsg" profile="/usr/sbin/cupsd"
name="/run/systemd/journal/socket" pid=884 comm="cupsd" requested_mask="w"
denied_mask="w" fsuid=0 ouid=0
[ 374.383833] audit: type=1400 audit(1466590347.068:35): apparmor="DENIED"
operation="sendmsg" profile="/usr/sbin/cupsd"
name="/run/systemd/journal/socket" pid=884 comm="cupsd" requested_mask="w"
denied_mask="w" fsuid=0 ouid=0
The filesystem is mounted as:
UUID=7b378779-2fea-4f8a-a365-ff9529ed110a / btrfs
defaults,noatime,compress=lzo,subvol=@ 0 1
UUID=7b378779-2fea-4f8a-a365-ff9529ed110a /home btrfs
defaults,noatime,compress=lzo,subvol=@home 0 2
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1595134
Title:
btrfs error: read only filesystem
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