audit: type=1804 audit(1558505094.654:52): pid=14941 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir869436599/syzkaller.NV79uI/306/file0" dev="sda1" ino=16564 res=1 ====================================================== WARNING: possible circular locking dependency detected 4.19.45 #17 Not tainted ------------------------------------------------------ syz-executor.3/14949 is trying to acquire lock: 000000005083f3c5 (&acct->lock#2){+.+.}, at: acct_pin_kill+0x27/0x100 kernel/acct.c:173 but task is already holding lock: 0000000043a041cb (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1578 [inline] 0000000043a041cb (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#4){.+.+}: 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+0x20b/0x360 fs/super.c:1387 sb_start_write include/linux/fs.h:1578 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:360 ovl_want_write+0x76/0xa0 fs/overlayfs/util.c:24 ovl_link+0x7c/0x2d5 fs/overlayfs/dir.c:674 vfs_link+0x79f/0xb60 fs/namei.c:4240 do_linkat+0x550/0x770 fs/namei.c:4308 __do_sys_link fs/namei.c:4337 [inline] __se_sys_link fs/namei.c:4335 [inline] __x64_sys_link+0x61/0x80 fs/namei.c:4335 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&ovl_i_mutex_key[depth]){+.+.}: down_write+0x38/0x90 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:747 [inline] ovl_write_iter+0x148/0xc20 fs/overlayfs/file.c:231 call_write_iter include/linux/fs.h:1820 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x587/0x810 fs/read_write.c:487 __kernel_write+0x110/0x390 fs/read_write.c:506 do_acct_process+0xd37/0x1150 kernel/acct.c:520 slow_acct_process kernel/acct.c:579 [inline] acct_process+0x568/0x61e kernel/acct.c:605 do_exit+0x17be/0x2fa0 kernel/exit.c:866 do_group_exit+0x135/0x370 kernel/exit.c:979 __do_sys_exit_group kernel/exit.c:990 [inline] __se_sys_exit_group kernel/exit.c:988 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:988 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&acct->lock#2){+.+.}: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 acct_pin_kill+0x27/0x100 kernel/acct.c:173 pin_kill+0x18a/0x860 fs/fs_pin.c:50 acct_on+0x574/0x790 kernel/acct.c:254 __do_sys_acct kernel/acct.c:286 [inline] __se_sys_acct kernel/acct.c:273 [inline] __x64_sys_acct+0xae/0x200 kernel/acct.c:273 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &acct->lock#2 --> &ovl_i_mutex_key[depth] --> sb_writers#4 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#4); lock(&ovl_i_mutex_key[depth]); lock(sb_writers#4); lock(&acct->lock#2); *** DEADLOCK *** 2 locks held by syz-executor.3/14949: #0: 00000000dc36c3fd (acct_on_mutex){+.+.}, at: __do_sys_acct kernel/acct.c:285 [inline] #0: 00000000dc36c3fd (acct_on_mutex){+.+.}, at: __se_sys_acct kernel/acct.c:273 [inline] #0: 00000000dc36c3fd (acct_on_mutex){+.+.}, at: __x64_sys_acct+0xa6/0x200 kernel/acct.c:273 #1: 0000000043a041cb (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1578 [inline] #1: 0000000043a041cb (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 stack backtrace: CPU: 1 PID: 14949 Comm: syz-executor.3 Not tainted 4.19.45 #17 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1861 [inline] check_prevs_add kernel/locking/lockdep.c:1974 [inline] validate_chain kernel/locking/lockdep.c:2415 [inline] __lock_acquire+0x2e6d/0x48f0 kernel/locking/lockdep.c:3411 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3900 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1300 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 acct_pin_kill+0x27/0x100 kernel/acct.c:173 pin_kill+0x18a/0x860 fs/fs_pin.c:50 acct_on+0x574/0x790 kernel/acct.c:254 __do_sys_acct kernel/acct.c:286 [inline] __se_sys_acct kernel/acct.c:273 [inline] __x64_sys_acct+0xae/0x200 kernel/acct.c:273 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459279 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8545dfac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a3 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000459279 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 000000000075bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8545dfb6d4 R13: 00000000004bf21b R14: 00000000004d0390 R15: 00000000ffffffff kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' Process accounting resumed kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000001e6036df): kobject_uevent_env Process accounting resumed kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' Process accounting resumed kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' Process accounting resumed kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' Process accounting resumed kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' Process accounting resumed kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' Process accounting resumed kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env Process accounting resumed kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env Process accounting resumed kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env Process accounting resumed kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' Process accounting resumed kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' Process accounting resumed kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' Process accounting resumed kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' Process accounting resumed kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (00000000ed050868): kobject_uevent_env kobject: 'kvm' (00000000ed050868): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. kobject: 'loop4' (0000000020426ca7): kobject_uevent_env kobject: 'loop4' (0000000020426ca7): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (000000001e6036df): kobject_uevent_env kobject: 'loop5' (000000001e6036df): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000006176d7ad): kobject_uevent_env kobject: 'loop0' (000000006176d7ad): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d0b19424): kobject_uevent_env kobject: 'loop1' (00000000d0b19424): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (00000000c16c60b8): kobject_uevent_env kobject: 'loop3' (00000000c16c60b8): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (000000008f884993): kobject_uevent_env kobject: 'loop2' (000000008f884993): fill_kobj_path: path = '/devices/virtual/block/loop2'