====================================================== WARNING: possible circular locking dependency detected 5.0.0-rc6+ #68 Not tainted ------------------------------------------------------ syz-executor.5/28962 is trying to acquire lock: 00000000eb48bcd6 (&pipe->mutex/1){+.+.}, at: __pipe_lock fs/pipe.c:83 [inline] 00000000eb48bcd6 (&pipe->mutex/1){+.+.}, at: fifo_open+0x159/0xb00 fs/pipe.c:905 but task is already holding lock: 00000000cb0bbf62 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] 00000000cb0bbf62 (&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: -> #2 (&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_stack+0x13e/0x2c0 fs/proc/base.c:434 proc_single_show+0xf6/0x180 fs/proc/base.c:739 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 -> #1 (&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 proc_reg_read+0x1fa/0x2c0 fs/proc/inode.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 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 do_splice+0xf7c/0x1330 fs/splice.c:1178 __do_sys_splice fs/splice.c:1419 [inline] __se_sys_splice fs/splice.c:1399 [inline] __x64_sys_splice+0x2c6/0x330 fs/splice.c:1399 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&pipe->mutex/1){+.+.}: lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 __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 __pipe_lock fs/pipe.c:83 [inline] fifo_open+0x159/0xb00 fs/pipe.c:905 do_dentry_open+0x47d/0x1130 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x10d7/0x4690 fs/namei.c:3534 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_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1963 [inline] __se_sys_execve fs/exec.c:1958 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1958 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: &pipe->mutex/1 --> &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(&pipe->mutex/1); *** DEADLOCK *** 1 lock held by syz-executor.5/28962: #0: 00000000cb0bbf62 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1407 [inline] #0: 00000000cb0bbf62 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file.isra.0+0x376/0x23f0 fs/exec.c:1750 stack backtrace: CPU: 0 PID: 28962 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #68 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 __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 __pipe_lock fs/pipe.c:83 [inline] fifo_open+0x159/0xb00 fs/pipe.c:905 do_dentry_open+0x47d/0x1130 fs/open.c:771 vfs_open+0xa0/0xd0 fs/open.c:880 do_last fs/namei.c:3418 [inline] path_openat+0x10d7/0x4690 fs/namei.c:3534 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_execve fs/exec.c:1882 [inline] __do_sys_execve fs/exec.c:1963 [inline] __se_sys_execve fs/exec.c:1958 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1958 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 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:00007f4841545c78 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f48415466d4 R13: 00000000004be429 R14: 00000000004cec48 R15: 00000000ffffffff protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): 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: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'ip6gre1' (00000000d6ca8e31): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'ip6gre1' (00000000d6ca8e31): kobject_uevent_env kobject: 'ip6gre1' (00000000d6ca8e31): fill_kobj_path: path = '/devices/virtual/net/ip6gre1' kobject: 'queues' (00000000cdb50dc5): kobject_add_internal: parent: 'ip6gre1', set: '' kobject: 'queues' (00000000cdb50dc5): kobject_uevent_env kobject: 'queues' (00000000cdb50dc5): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000beb6bc82): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000beb6bc82): kobject_uevent_env kobject: 'rx-0' (00000000beb6bc82): fill_kobj_path: path = '/devices/virtual/net/ip6gre1/queues/rx-0' kobject: 'tx-0' (000000003c843970): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000003c843970): kobject_uevent_env kobject: 'tx-0' (000000003c843970): fill_kobj_path: path = '/devices/virtual/net/ip6gre1/queues/tx-0' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'ip6gre1' (0000000021ff5599): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'ip6gre1' (0000000021ff5599): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'ip6gre1' (0000000021ff5599): fill_kobj_path: path = '/devices/virtual/net/ip6gre1' kobject: 'queues' (0000000007af3ded): kobject_add_internal: parent: 'ip6gre1', set: '' kobject: 'queues' (0000000007af3ded): kobject_uevent_env kobject: 'queues' (0000000007af3ded): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (0000000069839baf): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (0000000069839baf): kobject_uevent_env kobject: 'rx-0' (0000000069839baf): fill_kobj_path: path = '/devices/virtual/net/ip6gre1/queues/rx-0' kobject: 'tx-0' (0000000097725a03): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (0000000097725a03): kobject_uevent_env kobject: 'tx-0' (0000000097725a03): fill_kobj_path: path = '/devices/virtual/net/ip6gre1/queues/tx-0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'ip6gre1' (00000000cbcf7def): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'ip6gre1' (00000000cbcf7def): kobject_uevent_env kobject: 'ip6gre1' (00000000cbcf7def): fill_kobj_path: path = '/devices/virtual/net/ip6gre1' kobject: 'queues' (00000000b69a0952): kobject_add_internal: parent: 'ip6gre1', set: '' kobject: 'queues' (00000000b69a0952): kobject_uevent_env kobject: 'queues' (00000000b69a0952): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000d751f2d6): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000d751f2d6): kobject_uevent_env kobject: 'rx-0' (00000000d751f2d6): fill_kobj_path: path = '/devices/virtual/net/ip6gre1/queues/rx-0' kobject: 'tx-0' (000000004f723bba): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000004f723bba): kobject_uevent_env kobject: 'tx-0' (000000004f723bba): fill_kobj_path: path = '/devices/virtual/net/ip6gre1/queues/tx-0' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' net_ratelimit: 18 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_1 kobject: '0' (0000000014187a38): kobject_add_internal: parent: 'net', set: 'devices' protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 kobject: '0' (0000000014187a38): kobject_uevent_env kobject: '0' (0000000014187a38): fill_kobj_path: path = '/devices/virtual/net/0' kobject: 'queues' (000000008349060d): kobject_add_internal: parent: '0', set: '' kobject: 'queues' (000000008349060d): kobject_uevent_env kobject: 'queues' (000000008349060d): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000ed04f51d): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000ed04f51d): kobject_uevent_env kobject: 'rx-0' (00000000ed04f51d): fill_kobj_path: path = '/devices/virtual/net/0/queues/rx-0' kobject: 'tx-0' (00000000517c6285): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000517c6285): kobject_uevent_env kobject: 'tx-0' (00000000517c6285): fill_kobj_path: path = '/devices/virtual/net/0/queues/tx-0' kobject: 'brif' (000000008699af9e): kobject_add_internal: parent: '0', set: '' kobject: 'batman_adv' (0000000093b43d7d): kobject_add_internal: parent: '0', set: '' kobject: 'nr0' (00000000b70cd0c4): kobject_add_internal: parent: 'net', set: 'devices' protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_0 kobject: 'nr0' (00000000b70cd0c4): kobject_uevent_env kobject: 'nr0' (00000000b70cd0c4): fill_kobj_path: path = '/devices/virtual/net/nr0' kobject: 'queues' (00000000c83fdaf0): kobject_add_internal: parent: 'nr0', set: '' kobject: 'queues' (00000000c83fdaf0): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'queues' (00000000c83fdaf0): kobject_uevent_env: filter function caused the event to drop! kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'rx-0' (000000001ec38196): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000001ec38196): kobject_uevent_env kobject: 'rx-0' (000000001ec38196): fill_kobj_path: path = '/devices/virtual/net/nr0/queues/rx-0' kobject: 'tx-0' (0000000043bade97): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (0000000043bade97): kobject_uevent_env kobject: 'tx-0' (0000000043bade97): fill_kobj_path: path = '/devices/virtual/net/nr0/queues/tx-0' kobject: 'brif' (00000000be7b4329): kobject_add_internal: parent: 'nr0', set: '' kobject: 'batman_adv' (000000009680f056): kobject_add_internal: parent: 'nr0', set: '' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: '1' (0000000000a2e20c): kobject_add_internal: parent: 'net', set: 'devices' kobject: '1' (0000000000a2e20c): kobject_uevent_env kobject: '1' (0000000000a2e20c): fill_kobj_path: path = '/devices/virtual/net/1' kobject: 'queues' (00000000fb2ec148): kobject_add_internal: parent: '1', set: '' kobject: 'queues' (00000000fb2ec148): kobject_uevent_env kobject: 'queues' (00000000fb2ec148): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (0000000043b322ae): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (0000000043b322ae): kobject_uevent_env kobject: 'rx-0' (0000000043b322ae): fill_kobj_path: path = '/devices/virtual/net/1/queues/rx-0' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'tx-0' (0000000095a73606): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (0000000095a73606): kobject_uevent_env kobject: 'tx-0' (0000000095a73606): fill_kobj_path: path = '/devices/virtual/net/1/queues/tx-0' kobject: 'brif' (00000000cc2c48f9): kobject_add_internal: parent: '1', set: '' kobject: 'batman_adv' (0000000072929ac8): kobject_add_internal: parent: '1', set: '' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: '2' (000000006154bbed): kobject_add_internal: parent: 'net', set: 'devices' kobject: '2' (000000006154bbed): kobject_uevent_env kobject: '2' (000000006154bbed): fill_kobj_path: path = '/devices/virtual/net/2' kobject: 'queues' (0000000077beebec): kobject_add_internal: parent: '2', set: '' kobject: 'queues' (0000000077beebec): kobject_uevent_env kobject: 'queues' (0000000077beebec): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (000000000042ddd9): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (000000000042ddd9): kobject_uevent_env kobject: 'rx-0' (000000000042ddd9): fill_kobj_path: path = '/devices/virtual/net/2/queues/rx-0' kobject: 'tx-0' (00000000a0dec696): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000a0dec696): kobject_uevent_env kobject: 'tx-0' (00000000a0dec696): fill_kobj_path: path = '/devices/virtual/net/2/queues/tx-0' kobject: 'loop0' (00000000dcee3acb): kobject_uevent_env kobject: 'loop0' (00000000dcee3acb): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'brif' (000000002f4133cb): kobject_add_internal: parent: '2', set: '' kobject: 'batman_adv' (0000000015834e63): kobject_add_internal: parent: '2', set: '' kobject: 'loop4' (000000000528a0b1): kobject_uevent_env kobject: 'loop4' (000000000528a0b1): fill_kobj_path: path = '/devices/virtual/block/loop4'