[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.117188][ T27] audit: type=1800 audit(1561828298.188:25): pid=8902 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.168073][ T27] audit: type=1800 audit(1561828298.188:26): pid=8902 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.199197][ T27] audit: type=1800 audit(1561828298.188:27): pid=8902 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.206' (ECDSA) to the list of known hosts. 2019/06/29 17:11:49 parsed 1 programs 2019/06/29 17:11:51 executed programs: 0 syzkaller login: [ 74.330006][ T9073] IPVS: ftp: loaded support on port[0] = 21 [ 74.397461][ T9073] chnl_net:caif_netlink_parms(): no params data found [ 74.427084][ T9073] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.435137][ T9073] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.442978][ T9073] device bridge_slave_0 entered promiscuous mode [ 74.451495][ T9073] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.458722][ T9073] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.466453][ T9073] device bridge_slave_1 entered promiscuous mode [ 74.484946][ T9073] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.495782][ T9073] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.515392][ T9073] team0: Port device team_slave_0 added [ 74.523700][ T9073] team0: Port device team_slave_1 added [ 74.600774][ T9073] device hsr_slave_0 entered promiscuous mode [ 74.668263][ T9073] device hsr_slave_1 entered promiscuous mode [ 74.736019][ T9073] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.743237][ T9073] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.751086][ T9073] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.758186][ T9073] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.795847][ T9073] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.807304][ T2875] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.827496][ T2875] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.836214][ T2875] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.844937][ T2875] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.856494][ T9073] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.867639][ T9075] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.876229][ T9075] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.883323][ T9075] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.894517][ T2875] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.903953][ T2875] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.911094][ T2875] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.929435][ T9075] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.939948][ T9075] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.951222][ T9075] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.965853][ T9073] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 74.976610][ T9073] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.989048][ T2875] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.997830][ T2875] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.007050][ T2875] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.024620][ T9073] 8021q: adding VLAN 0 to HW filter on device batadv0 2019/06/29 17:11:56 executed programs: 5 [ 84.222365][ T9131] [ 84.224724][ T9131] ===================================================== [ 84.231634][ T9131] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 84.239069][ T9131] 5.2.0-rc6-next-20190628 #25 Not tainted [ 84.244769][ T9131] ----------------------------------------------------- [ 84.251697][ T9131] syz-executor.0/9131 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: [ 84.259838][ T9131] 0000000033f919a3 (&ctx->fd_wqh){....}, at: io_submit_one+0xefa/0x2ef0 [ 84.268390][ T9131] [ 84.268390][ T9131] and this task is already holding: [ 84.275833][ T9131] 000000006922d685 (&(&ctx->ctx_lock)->rlock){..-.}, at: io_submit_one+0xeb5/0x2ef0 [ 84.285204][ T9131] which would create a new lock dependency: [ 84.291077][ T9131] (&(&ctx->ctx_lock)->rlock){..-.} -> (&ctx->fd_wqh){....} [ 84.298699][ T9131] [ 84.298699][ T9131] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 84.308402][ T9131] (&(&ctx->ctx_lock)->rlock){..-.} [ 84.308412][ T9131] [ 84.308412][ T9131] ... which became SOFTIRQ-irq-safe at: [ 84.321290][ T9131] lock_acquire+0x190/0x410 [ 84.325868][ T9131] _raw_spin_lock_irq+0x60/0x80 [ 84.330793][ T9131] free_ioctx_users+0x2d/0x490 [ 84.335678][ T9131] percpu_ref_switch_to_atomic_rcu+0x4c0/0x570 [ 84.342025][ T9131] rcu_core+0x67f/0x1580 [ 84.346471][ T9131] rcu_core_si+0x9/0x10 [ 84.350711][ T9131] __do_softirq+0x262/0x98c [ 84.355295][ T9131] irq_exit+0x19b/0x1e0 [ 84.359614][ T9131] smp_apic_timer_interrupt+0x1a3/0x610 [ 84.365332][ T9131] apic_timer_interrupt+0xf/0x20 [ 84.370464][ T9131] native_safe_halt+0xe/0x10 [ 84.375126][ T9131] arch_cpu_idle+0xa/0x10 [ 84.379528][ T9131] default_idle_call+0x84/0xb0 [ 84.384495][ T9131] do_idle+0x413/0x760 [ 84.388825][ T9131] cpu_startup_entry+0x1b/0x20 [ 84.393660][ T9131] start_secondary+0x3fe/0x580 [ 84.398588][ T9131] secondary_startup_64+0xa4/0xb0 [ 84.403680][ T9131] [ 84.403680][ T9131] to a SOFTIRQ-irq-unsafe lock: [ 84.410911][ T9131] (&ctx->fault_pending_wqh){+.+.} [ 84.410921][ T9131] [ 84.410921][ T9131] ... which became SOFTIRQ-irq-unsafe at: [ 84.424065][ T9131] ... [ 84.424087][ T9131] lock_acquire+0x190/0x410 [ 84.431277][ T9131] _raw_spin_lock+0x2f/0x40 [ 84.435952][ T9131] userfaultfd_release+0x4ca/0x710 [ 84.441252][ T9131] __fput+0x2ff/0x890 [ 84.445401][ T9131] ____fput+0x16/0x20 [ 84.449536][ T9131] task_work_run+0x145/0x1c0 [ 84.454243][ T9131] exit_to_usermode_loop+0x280/0x2d0 [ 84.459918][ T9131] do_syscall_64+0x5a9/0x6a0 [ 84.464601][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.471341][ T9131] [ 84.471341][ T9131] other info that might help us debug this: [ 84.471341][ T9131] [ 84.482005][ T9131] Chain exists of: [ 84.482005][ T9131] &(&ctx->ctx_lock)->rlock --> &ctx->fd_wqh --> &ctx->fault_pending_wqh [ 84.482005][ T9131] [ 84.496736][ T9131] Possible interrupt unsafe locking scenario: [ 84.496736][ T9131] [ 84.505285][ T9131] CPU0 CPU1 [ 84.510911][ T9131] ---- ---- [ 84.516263][ T9131] lock(&ctx->fault_pending_wqh); [ 84.521500][ T9131] local_irq_disable(); [ 84.528342][ T9131] lock(&(&ctx->ctx_lock)->rlock); [ 84.540354][ T9131] lock(&ctx->fd_wqh); [ 84.547120][ T9131] [ 84.550673][ T9131] lock(&(&ctx->ctx_lock)->rlock); [ 84.556035][ T9131] [ 84.556035][ T9131] *** DEADLOCK *** [ 84.556035][ T9131] [ 84.564580][ T9131] 1 lock held by syz-executor.0/9131: [ 84.570018][ T9131] #0: 000000006922d685 (&(&ctx->ctx_lock)->rlock){..-.}, at: io_submit_one+0xeb5/0x2ef0 [ 84.580481][ T9131] [ 84.580481][ T9131] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 84.590893][ T9131] -> (&(&ctx->ctx_lock)->rlock){..-.} { [ 84.596432][ T9131] IN-SOFTIRQ-W at: [ 84.600459][ T9131] lock_acquire+0x190/0x410 [ 84.606710][ T9131] _raw_spin_lock_irq+0x60/0x80 [ 84.613479][ T9131] free_ioctx_users+0x2d/0x490 [ 84.620166][ T9131] percpu_ref_switch_to_atomic_rcu+0x4c0/0x570 [ 84.628225][ T9131] rcu_core+0x67f/0x1580 [ 84.634228][ T9131] rcu_core_si+0x9/0x10 [ 84.640106][ T9131] __do_softirq+0x262/0x98c [ 84.646341][ T9131] irq_exit+0x19b/0x1e0 [ 84.652330][ T9131] smp_apic_timer_interrupt+0x1a3/0x610 [ 84.659774][ T9131] apic_timer_interrupt+0xf/0x20 [ 84.666477][ T9131] native_safe_halt+0xe/0x10 [ 84.672747][ T9131] arch_cpu_idle+0xa/0x10 [ 84.678813][ T9131] default_idle_call+0x84/0xb0 [ 84.685216][ T9131] do_idle+0x413/0x760 [ 84.690945][ T9131] cpu_startup_entry+0x1b/0x20 [ 84.697566][ T9131] start_secondary+0x3fe/0x580 [ 84.704080][ T9131] secondary_startup_64+0xa4/0xb0 [ 84.710753][ T9131] INITIAL USE at: [ 84.714743][ T9131] lock_acquire+0x190/0x410 [ 84.721006][ T9131] _raw_spin_lock_irq+0x60/0x80 [ 84.727486][ T9131] free_ioctx_users+0x2d/0x490 [ 84.734071][ T9131] percpu_ref_switch_to_atomic_rcu+0x4c0/0x570 [ 84.741911][ T9131] rcu_core+0x67f/0x1580 [ 84.747802][ T9131] rcu_core_si+0x9/0x10 [ 84.753603][ T9131] __do_softirq+0x262/0x98c [ 84.760396][ T9131] irq_exit+0x19b/0x1e0 [ 84.766248][ T9131] smp_apic_timer_interrupt+0x1a3/0x610 [ 84.773480][ T9131] apic_timer_interrupt+0xf/0x20 [ 84.779999][ T9131] native_safe_halt+0xe/0x10 [ 84.787022][ T9131] arch_cpu_idle+0xa/0x10 [ 84.793308][ T9131] default_idle_call+0x84/0xb0 [ 84.799818][ T9131] do_idle+0x413/0x760 [ 84.805549][ T9131] cpu_startup_entry+0x1b/0x20 [ 84.811887][ T9131] start_secondary+0x3fe/0x580 [ 84.818232][ T9131] secondary_startup_64+0xa4/0xb0 [ 84.825111][ T9131] } [ 84.827611][ T9131] ... key at: [] __key.53845+0x0/0x40 [ 84.835215][ T9131] ... acquired at: [ 84.839019][ T9131] lock_acquire+0x190/0x410 [ 84.843831][ T9131] _raw_spin_lock+0x2f/0x40 [ 84.848678][ T9131] io_submit_one+0xefa/0x2ef0 [ 84.853520][ T9131] __x64_sys_io_submit+0x1bd/0x570 [ 84.858968][ T9131] do_syscall_64+0xfd/0x6a0 [ 84.863715][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.870146][ T9131] [ 84.872722][ T9131] [ 84.872722][ T9131] the dependencies between the lock to be acquired [ 84.872726][ T9131] and SOFTIRQ-irq-unsafe lock: [ 84.886637][ T9131] -> (&ctx->fault_pending_wqh){+.+.} { [ 84.892250][ T9131] HARDIRQ-ON-W at: [ 84.896314][ T9131] lock_acquire+0x190/0x410 [ 84.902620][ T9131] _raw_spin_lock+0x2f/0x40 [ 84.908941][ T9131] userfaultfd_release+0x4ca/0x710 [ 84.916053][ T9131] __fput+0x2ff/0x890 [ 84.921992][ T9131] ____fput+0x16/0x20 [ 84.927785][ T9131] task_work_run+0x145/0x1c0 [ 84.934294][ T9131] exit_to_usermode_loop+0x280/0x2d0 [ 84.941672][ T9131] do_syscall_64+0x5a9/0x6a0 [ 84.948085][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 84.955778][ T9131] SOFTIRQ-ON-W at: [ 84.959840][ T9131] lock_acquire+0x190/0x410 [ 84.966157][ T9131] _raw_spin_lock+0x2f/0x40 [ 84.972482][ T9131] userfaultfd_release+0x4ca/0x710 [ 84.979415][ T9131] __fput+0x2ff/0x890 [ 84.985217][ T9131] ____fput+0x16/0x20 [ 84.991026][ T9131] task_work_run+0x145/0x1c0 [ 84.997476][ T9131] exit_to_usermode_loop+0x280/0x2d0 [ 85.004621][ T9131] do_syscall_64+0x5a9/0x6a0 [ 85.011140][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.018997][ T9131] INITIAL USE at: [ 85.022977][ T9131] lock_acquire+0x190/0x410 [ 85.029251][ T9131] _raw_spin_lock+0x2f/0x40 [ 85.035499][ T9131] userfaultfd_read+0x54d/0x1940 [ 85.042184][ T9131] __vfs_read+0x8a/0x110 [ 85.048265][ T9131] vfs_read+0x1f0/0x440 [ 85.054143][ T9131] ksys_read+0x14f/0x290 [ 85.060112][ T9131] __x64_sys_read+0x73/0xb0 [ 85.066386][ T9131] do_syscall_64+0xfd/0x6a0 [ 85.072876][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.080609][ T9131] } [ 85.083226][ T9131] ... key at: [] __key.46557+0x0/0x40 [ 85.091006][ T9131] ... acquired at: [ 85.095027][ T9131] _raw_spin_lock+0x2f/0x40 [ 85.099702][ T9131] userfaultfd_read+0x54d/0x1940 [ 85.104954][ T9131] __vfs_read+0x8a/0x110 [ 85.109434][ T9131] vfs_read+0x1f0/0x440 [ 85.113754][ T9131] ksys_read+0x14f/0x290 [ 85.118156][ T9131] __x64_sys_read+0x73/0xb0 [ 85.122903][ T9131] do_syscall_64+0xfd/0x6a0 [ 85.127572][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.133616][ T9131] [ 85.135970][ T9131] -> (&ctx->fd_wqh){....} { [ 85.140457][ T9131] INITIAL USE at: [ 85.144380][ T9131] lock_acquire+0x190/0x410 [ 85.150439][ T9131] _raw_spin_lock_irq+0x60/0x80 [ 85.156890][ T9131] userfaultfd_read+0x27a/0x1940 [ 85.163388][ T9131] __vfs_read+0x8a/0x110 [ 85.169194][ T9131] vfs_read+0x1f0/0x440 [ 85.175009][ T9131] ksys_read+0x14f/0x290 [ 85.180911][ T9131] __x64_sys_read+0x73/0xb0 [ 85.186967][ T9131] do_syscall_64+0xfd/0x6a0 [ 85.193034][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.200614][ T9131] } [ 85.203149][ T9131] ... key at: [] __key.46560+0x0/0x40 [ 85.210740][ T9131] ... acquired at: [ 85.214547][ T9131] lock_acquire+0x190/0x410 [ 85.219220][ T9131] _raw_spin_lock+0x2f/0x40 [ 85.224005][ T9131] io_submit_one+0xefa/0x2ef0 [ 85.229043][ T9131] __x64_sys_io_submit+0x1bd/0x570 [ 85.234546][ T9131] do_syscall_64+0xfd/0x6a0 [ 85.239214][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.245464][ T9131] [ 85.247787][ T9131] [ 85.247787][ T9131] stack backtrace: [ 85.253880][ T9131] CPU: 1 PID: 9131 Comm: syz-executor.0 Not tainted 5.2.0-rc6-next-20190628 #25 [ 85.262882][ T9131] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.273000][ T9131] Call Trace: [ 85.276349][ T9131] dump_stack+0x172/0x1f0 [ 85.280915][ T9131] check_irq_usage.cold+0x5b4/0x72e [ 85.286267][ T9131] ? check_usage_forwards+0x330/0x330 [ 85.291632][ T9131] ? check_path+0x26/0x40 [ 85.295946][ T9131] ? kasan_check_read+0x11/0x20 [ 85.300786][ T9131] ? check_noncircular+0x16a/0x3e0 [ 85.305923][ T9131] ? print_circular_bug+0x200/0x200 [ 85.311121][ T9131] ? __lockdep_reset_lock+0x450/0x450 [ 85.316523][ T9131] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.322764][ T9131] __lock_acquire+0x25bd/0x4c20 [ 85.327743][ T9131] ? __lock_acquire+0x25bd/0x4c20 [ 85.332757][ T9131] ? mark_held_locks+0xf0/0xf0 [ 85.337515][ T9131] ? trace_hardirqs_on+0x67/0x240 [ 85.342539][ T9131] ? kasan_check_read+0x11/0x20 [ 85.347377][ T9131] lock_acquire+0x190/0x410 [ 85.351859][ T9131] ? io_submit_one+0xefa/0x2ef0 [ 85.356751][ T9131] _raw_spin_lock+0x2f/0x40 [ 85.361366][ T9131] ? io_submit_one+0xefa/0x2ef0 [ 85.366411][ T9131] io_submit_one+0xefa/0x2ef0 [ 85.371111][ T9131] ? lookup_ioctx+0x1d7/0x830 [ 85.376048][ T9131] ? ioctx_alloc+0x1dc0/0x1dc0 [ 85.380871][ T9131] ? aio_setup_rw+0x180/0x180 [ 85.385577][ T9131] __x64_sys_io_submit+0x1bd/0x570 [ 85.390916][ T9131] ? __x64_sys_io_submit+0x1bd/0x570 [ 85.396208][ T9131] ? __ia32_sys_io_destroy+0x420/0x420 [ 85.401806][ T9131] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 85.407268][ T9131] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 85.412740][ T9131] ? do_syscall_64+0x26/0x6a0 [ 85.417491][ T9131] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.423803][ T9131] ? do_syscall_64+0x26/0x6a0 [ 85.428713][ T9131] ? lockdep_hardirqs_on+0x418/0x5d0 [ 85.434004][ T9131] do_syscall_64+0xfd/0x6a0 [ 85.438501][ T9131] ? do_syscall_64+0xfd/0x6a0 [ 85.443404][ T9131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.449295][ T9131] RIP: 0033:0x459519 [ 85.453177][ T9131] 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 [ 85.473706][ T9131] RSP: 002b:00007fa9aa606c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 85.492220][ T9131] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519 [ 85.500181][ T9131] RDX: 0000000020000600 RSI: 0000000000000001 RDI: 00007fa9aa608000 [ 85.508238][ T9131] RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 [ 85.516194][ T9131] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa9aa6076d4 [ 85.524280][ T9131] R13: 00000000004c0898 R14: 00000000004d3548 R15: 00000000ffffffff 2019/06/29 17:12:02 executed programs: 10 [ 85.643064][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 85.650814][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 86.523066][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 86.530421][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 87.413640][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 87.420900][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 88.293415][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 88.301160][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 89.214116][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 89.221574][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 90.154330][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 90.161602][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' 2019/06/29 17:12:08 executed programs: 16 [ 91.053460][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 91.060713][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 92.003099][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 92.010315][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 92.883244][ T3878] kobject: 'loop0' (00000000ea7e06f4): kobject_uevent_env [ 92.890764][ T3878] kobject: 'loop0' (00000000ea7e06f4): fill_kobj_path: path = '/devices/virtual/block/loop0'