WARNING: possible circular locking dependency detected
4.14.228-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/25706 is trying to acquire lock:
 (&sig->cred_guard_mutex){+.+.}, at: [<ffffffff81a066e7>] lock_trace fs/proc/base.c:407 [inline]
 (&sig->cred_guard_mutex){+.+.}, at: [<ffffffff81a066e7>] proc_pid_syscall+0xa7/0x2a0 fs/proc/base.c:639

but task is already holding lock:
 (&p->lock){+.+.}, at: [<ffffffff818e708a>] seq_read+0xba/0x1120 fs/seq_file.c:165

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&p->lock){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
       seq_read+0xba/0x1120 fs/seq_file.c:165
       do_loop_readv_writev fs/read_write.c:695 [inline]
       do_loop_readv_writev fs/read_write.c:682 [inline]
       do_iter_read+0x3eb/0x5b0 fs/read_write.c:919
       vfs_readv+0xc8/0x120 fs/read_write.c:981
       kernel_readv fs/splice.c:361 [inline]
       default_file_splice_read+0x418/0x910 fs/splice.c:416
       do_splice_to+0xfb/0x140 fs/splice.c:880
       splice_direct_to_actor+0x207/0x730 fs/splice.c:952
       do_splice_direct+0x164/0x210 fs/splice.c:1061
       do_sendfile+0x47f/0xb30 fs/read_write.c:1441
       SYSC_sendfile64 fs/read_write.c:1502 [inline]
       SyS_sendfile64+0xff/0x110 fs/read_write.c:1488
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

-> #3 (sb_writers#3){.+.+}:
       percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline]
       percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
       __sb_start_write+0x64/0x260 fs/super.c:1342
       sb_start_write include/linux/fs.h:1549 [inline]
       mnt_want_write+0x3a/0xb0 fs/namespace.c:386
       ovl_do_remove+0x67/0xb90 fs/overlayfs/dir.c:759
       vfs_rmdir.part.0+0x144/0x390 fs/namei.c:3908
       vfs_rmdir fs/namei.c:3893 [inline]
       do_rmdir+0x334/0x3c0 fs/namei.c:3968
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

-> #2 (&ovl_i_mutex_dir_key[depth]){++++}:
       down_read+0x36/0x80 kernel/locking/rwsem.c:24
       inode_lock_shared include/linux/fs.h:729 [inline]
       lookup_slow+0x129/0x400 fs/namei.c:1674
       lookup_one_len_unlocked+0x3a0/0x410 fs/namei.c:2595
       ovl_lookup_single+0x33/0x6d0 fs/overlayfs/namei.c:208
       ovl_lookup_layer+0x2ef/0x3d0 fs/overlayfs/namei.c:265
       ovl_lookup+0x5d9/0x1120 fs/overlayfs/namei.c:670
       lookup_slow+0x20a/0x400 fs/namei.c:1696
       walk_component+0x6a1/0xbc0 fs/namei.c:1825
       lookup_last fs/namei.c:2293 [inline]
       path_lookupat+0x1bb/0x780 fs/namei.c:2343
       filename_lookup+0x18a/0x510 fs/namei.c:2377
       user_path include/linux/namei.h:62 [inline]
       do_mount+0x118/0x2a00 fs/namespace.c:2819
       SYSC_mount fs/namespace.c:3095 [inline]
       SyS_mount+0xa8/0x120 fs/namespace.c:3072
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

-> #1 (&ovl_i_mutex_dir_key[depth]#2){++++}:
       down_read+0x36/0x80 kernel/locking/rwsem.c:24
       inode_lock_shared include/linux/fs.h:729 [inline]
       do_last fs/namei.c:3333 [inline]
       path_openat+0x149b/0x2970 fs/namei.c:3569
       do_filp_open+0x179/0x3c0 fs/namei.c:3603
       do_open_execat+0xd3/0x450 fs/exec.c:849
       do_execveat_common+0x711/0x1f30 fs/exec.c:1755
       do_execve fs/exec.c:1860 [inline]
       SYSC_execve fs/exec.c:1941 [inline]
       SyS_execve+0x3b/0x50 fs/exec.c:1936
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

-> #0 (&sig->cred_guard_mutex){+.+.}:
       lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
       lock_trace fs/proc/base.c:407 [inline]
       proc_pid_syscall+0xa7/0x2a0 fs/proc/base.c:639
       proc_single_show+0xe7/0x150 fs/proc/base.c:761
       seq_read+0x4cf/0x1120 fs/seq_file.c:237
       __vfs_read+0xe4/0x620 fs/read_write.c:411
       vfs_read+0x139/0x340 fs/read_write.c:447
       SYSC_read fs/read_write.c:574 [inline]
       SyS_read+0xf2/0x210 fs/read_write.c:567
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x46/0xbb

other info that might help us debug this:

Chain exists of:
  &sig->cred_guard_mutex --> sb_writers#3 --> &p->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&p->lock);
                               lock(sb_writers#3);
                               lock(&p->lock);
  lock(&sig->cred_guard_mutex);

 *** DEADLOCK ***

2 locks held by syz-executor.3/25706:
 #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff818d129b>] __fdget_pos+0x1fb/0x2b0 fs/file.c:769
 #1:  (&p->lock){+.+.}, at: [<ffffffff818e708a>] seq_read+0xba/0x1120 fs/seq_file.c:165

stack backtrace:
CPU: 1 PID: 25706 Comm: syz-executor.3 Not tainted 4.14.228-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258
 check_prev_add kernel/locking/lockdep.c:1905 [inline]
 check_prevs_add kernel/locking/lockdep.c:2022 [inline]
 validate_chain kernel/locking/lockdep.c:2464 [inline]
 __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
 lock_trace fs/proc/base.c:407 [inline]
 proc_pid_syscall+0xa7/0x2a0 fs/proc/base.c:639
 proc_single_show+0xe7/0x150 fs/proc/base.c:761
 seq_read+0x4cf/0x1120 fs/seq_file.c:237
 __vfs_read+0xe4/0x620 fs/read_write.c:411
 vfs_read+0x139/0x340 fs/read_write.c:447
 SYSC_read fs/read_write.c:574 [inline]
 SyS_read+0xf2/0x210 fs/read_write.c:567
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007fbdcb13c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffc5619242f R14: 00007fbdcb13c300 R15: 0000000000022000
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
XFS (loop1): unknown mount option [euid>00000000000000000000].
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
XFS (loop1): unknown mount option [euid>00000000000000000000].
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
EXT4-fs (loop1): VFS: Can't find ext4 filesystem
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
EXT4-fs (loop1): VFS: Can't find ext4 filesystem
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
mkiss: ax1: crc mode is auto.
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue
mkiss: ax2: crc mode is auto.
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
FAT-fs (loop3): bogus number of reserved sectors
FAT-fs (loop3): Can't find a valid FAT filesystem
FAT-fs (loop3): bogus number of reserved sectors
FAT-fs (loop3): Can't find a valid FAT filesystem
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'.
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
print_req_error: 41 callbacks suppressed
print_req_error: I/O error, dev loop4, sector 0
buffer_io_error: 37 callbacks suppressed
Buffer I/O error on dev loop4, logical block 0, async page read
print_req_error: I/O error, dev loop4, sector 4
Buffer I/O error on dev loop4, logical block 2, async page read
print_req_error: I/O error, dev loop4, sector 6
Buffer I/O error on dev loop4, logical block 3, async page read
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
print_req_error: I/O error, dev loop4, sector 0
Buffer I/O error on dev loop4, logical block 0, async page read
print_req_error: I/O error, dev loop4, sector 4
Buffer I/O error on dev loop4, logical block 2, async page read
print_req_error: I/O error, dev loop4, sector 6
Buffer I/O error on dev loop4, logical block 3, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 4
Buffer I/O error on dev loop2, logical block 2, async page read
print_req_error: I/O error, dev loop2, sector 6
Buffer I/O error on dev loop2, logical block 3, async page read
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
print_req_error: I/O error, dev loop4, sector 0
Buffer I/O error on dev loop4, logical block 0, async page read
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection.
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
batman_adv: batadv0: Removing interface: batadv_slave_0
batman_adv: batadv0: Removing interface: batadv_slave_1
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
device hsr_slave_1 left promiscuous mode
device hsr_slave_0 left promiscuous mode
team0 (unregistering): Port device team_slave_1 removed
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
bond0 (unregistering): Releasing backup interface bond_slave_0
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
bond0 (unregistering): Released all slaves
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
ieee80211 M: Selected rate control algorithm 'minstrel_ht'
mkiss: ax3: crc mode is auto.
mkiss: ax2: crc mode is auto.
mkiss: ax1: crc mode is auto.
ieee80211 M: hwaddr 02:00:00:00:04:00 registered
ieee80211 phy5: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy5: hwaddr 02:00:00:00:05:00 registered
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
mkiss: ax1: crc mode is auto.
mkiss: ax2: crc mode is auto.
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
netlink: 14 bytes leftover after parsing attributes in process `syz-executor.3'.
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'.
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'.
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
EXT4-fs (loop3): Unrecognized mount option "fuse" or missing value
print_req_error: 37 callbacks suppressed
print_req_error: I/O error, dev loop2, sector 0
buffer_io_error: 36 callbacks suppressed
Buffer I/O error on dev loop2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 4
Buffer I/O error on dev loop2, logical block 2, async page read
print_req_error: I/O error, dev loop2, sector 6
Buffer I/O error on dev loop2, logical block 3, async page read
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs warning (device loop1): read_mmp_block:110: Error -117 while reading MMP block 0
EXT4-fs (loop1): warning: mounting unchecked fs, running e2fsck is recommended
EXT4-fs warning (device loop1): read_mmp_block:110: Error -117 while reading MMP block 0
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 4
Buffer I/O error on dev loop2, logical block 2, async page read
print_req_error: I/O error, dev loop2, sector 6
Buffer I/O error on dev loop2, logical block 3, async page read
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs warning (device loop1): read_mmp_block:110: Error -117 while reading MMP block 0
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs warning (device loop1): read_mmp_block:110: Error -117 while reading MMP block 0
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs warning (device loop1): read_mmp_block:110: Error -117 while reading MMP block 0
device veth1_macvtap left promiscuous mode
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
print_req_error: I/O error, dev loop4, sector 0
Buffer I/O error on dev loop4, logical block 0, async page read
print_req_error: I/O error, dev loop4, sector 4
Buffer I/O error on dev loop4, logical block 2, async page read
print_req_error: I/O error, dev loop4, sector 6
Buffer I/O error on dev loop4, logical block 3, async page read
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs warning (device loop1): read_mmp_block:110: Error -117 while reading MMP block 0
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2, logical block 0, async page read
EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue
EXT4-fs warning (device loop1): read_mmp_block:110: Error -117 while reading MMP block 0
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop2): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): unrecognized mount option "fsuuid=ba43d619-1a2d-490e-0658-"
NILFS (loop2): broken superblock, retrying with spare superblock (blocksize = 1024)
NILFS (loop4): broken superblock, retrying with spare superblock (blocksize = 1024)