====================================================== kobject: 'loop0' (000000005dab8b04): kobject_uevent_env WARNING: possible circular locking dependency detected 5.0.0-rc6+ #73 Not tainted ------------------------------------------------------ syz-executor.1/29381 is trying to acquire lock: 00000000b4db54a0 (&ovl_i_mutex_dir_key[depth]){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] 00000000b4db54a0 (&ovl_i_mutex_dir_key[depth]){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1687 but task is already holding lock: 00000000cd239ae4 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] 00000000cd239ae4 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102 lock_trace+0x4a/0xe0 fs/proc/base.c:384 proc_pid_syscall+0x98/0x250 fs/proc/base.c:619 proc_single_show+0xf6/0x180 fs/proc/base.c:739 kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' seq_read+0x4db/0x1130 fs/seq_file.c:229 do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:921 vfs_readv+0xf0/0x160 fs/read_write.c:983 do_preadv+0x1c4/0x280 fs/read_write.c:1067 __do_sys_preadv fs/read_write.c:1117 [inline] __se_sys_preadv fs/read_write.c:1112 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1112 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 seq_read+0x71/0x1130 fs/seq_file.c:161 do_loop_readv_writev fs/read_write.c:700 [inline] do_loop_readv_writev fs/read_write.c:687 [inline] do_iter_read+0x4a9/0x660 fs/read_write.c:921 vfs_readv+0xf0/0x160 fs/read_write.c:983 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x475/0x890 fs/splice.c:417 do_splice_to+0x12a/0x190 fs/splice.c:880 splice_direct_to_actor+0x2d2/0x970 fs/splice.c:957 do_splice_direct+0x1da/0x2a0 fs/splice.c:1066 do_sendfile+0x597/0xd00 fs/read_write.c:1436 __do_sys_sendfile64 fs/read_write.c:1497 [inline] __se_sys_sendfile64 fs/read_write.c:1483 [inline] __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1483 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (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+0x20b/0x360 fs/super.c:1389 sb_start_write include/linux/fs.h:1603 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:357 ovl_want_write+0x76/0xa0 fs/overlayfs/util.c:24 ovl_create_object+0xb3/0x2c0 fs/overlayfs/dir.c:599 ovl_create+0x28/0x30 fs/overlayfs/dir.c:630 lookup_open+0x12e0/0x1b10 fs/namei.c:3234 do_last fs/namei.c:3324 [inline] path_openat+0x149a/0x4690 fs/namei.c:3534 do_filp_open+0x1a1/0x280 fs/namei.c:3564 do_sys_open+0x3fe/0x5d0 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 down_read+0x3b/0x90 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:767 [inline] lookup_slow+0x4a/0x80 fs/namei.c:1687 walk_component+0x74b/0x2000 fs/namei.c:1810 link_path_walk.part.0+0x980/0x1340 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x1f9/0x4690 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3564 do_open_execat+0x13b/0x6d0 fs/exec.c:856 __do_execve_file.isra.0+0x178d/0x23f0 fs/exec.c:1758 do_execveat_common fs/exec.c:1865 [inline] do_execveat fs/exec.c:1893 [inline] __do_sys_execveat fs/exec.c:1974 [inline] __se_sys_execveat fs/exec.c:1966 [inline] __x64_sys_execveat+0xed/0x130 fs/exec.c:1966 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_key[depth] --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 1 lock held by syz-executor.1/29381: #0: 00000000cd239ae4 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000cd239ae4 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 stack backtrace: CPU: 0 PID: 29381 Comm: syz-executor.1 Not tainted 5.0.0-rc6+ #73 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:1224 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2350 [inline] __lock_acquire+0x2f00/0x4700 kernel/locking/lockdep.c:3338 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 down_read+0x3b/0x90 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:767 [inline] lookup_slow+0x4a/0x80 fs/namei.c:1687 walk_component+0x74b/0x2000 fs/namei.c:1810 link_path_walk.part.0+0x980/0x1340 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x1f9/0x4690 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3564 do_open_execat+0x13b/0x6d0 fs/exec.c:856 __do_execve_file.isra.0+0x178d/0x23f0 fs/exec.c:1758 do_execveat_common fs/exec.c:1865 [inline] do_execveat fs/exec.c:1893 [inline] __do_sys_execveat fs/exec.c:1974 [inline] __se_sys_execveat fs/exec.c:1966 [inline] __x64_sys_execveat+0xed/0x130 fs/exec.c:1966 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffa36b99c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457e29 RDX: 0000000020000240 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000400 R11: 0000000000000246 R12: 00007ffa36b9a6d4 R13: 00000000004be41b R14: 00000000004cec78 R15: 00000000ffffffff kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop4' (000000004557ea8c): kobject_uevent_env kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (0000000031147606): kobject_uevent_env kobject: 'kvm' (0000000031147606): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000031147606): kobject_uevent_env protocol 88fb is buggy, dev hsr_slave_0 kobject: 'kvm' (0000000031147606): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000031147606): kobject_uevent_env kobject: 'kvm' (0000000031147606): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000031147606): kobject_uevent_env kobject: 'kvm' (0000000031147606): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env protocol 88fb is buggy, dev hsr_slave_0 kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' protocol 88fb is buggy, dev hsr_slave_1 overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env overlayfs: unrecognized mount option "lowertir=.:file0" or missing value kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' overlayfs: unrecognized mount option "lowertir=.:file0" or missing value kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' overlayfs: unrecognized mount option "lolerdir=.U;؅" or missing value overlayfs: unrecognized mount option "lolerdir=.U;؅" or missing value kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env overlayfs: unrecognized mount option "upperdIr=./file0" or missing value kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' overlayfs: unrecognized mount option "upperdIr=./file0" or missing value kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' overlayfs: failed to resolve './fil%0': -2 kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' overlayfs: failed to resolve './fil%0': -2 kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' overlayfs: failed to resolve './file1': -2 kobject: 'loop4' (000000004557ea8c): kobject_uevent_env kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env overlayfs: failed to resolve './file1': -2 kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' overlayfs: failed to resolve './file1': -2 overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env overlayfs: unrecognized mount option "lgwerdir=.:fale " or missing value overlayfs: failed to resolve './file1': -2 kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' overlayfs: unrecognized mount option "lgwerdir=.:fale " or missing value kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' overlayfs: failed to resolve './file1': -2 kobject: 'loop0' (000000005dab8b04): kobject_uevent_env overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' overlayfs: failed to resolve './file1': -2 kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env overlayfs: filesystem on './file0' not supported as upperdir kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000004557ea8c): kobject_uevent_env kobject: 'loop4' (000000004557ea8c): fill_kobj_path: path = '/devices/virtual/block/loop4' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (000000005dab8b04): kobject_uevent_env kobject: 'loop0' (000000005dab8b04): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000008c40e7fc): kobject_uevent_env kobject: 'loop3' (000000008c40e7fc): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5' overlayfs: failed to resolve './file1': -2 overlayfs: missing 'lowerdir' overlayfs: failed to resolve './file1': -2 kobject: 'loop5' (000000009840cd71): kobject_uevent_env kobject: 'loop5' (000000009840cd71): fill_kobj_path: path = '/devices/virtual/block/loop5'