[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 41.743195] audit: type=1800 audit(1548639178.244:25): pid=7946 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 41.782768] audit: type=1800 audit(1548639178.244:26): pid=7946 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 41.814259] audit: type=1800 audit(1548639178.244:27): pid=7946 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 syzkaller login: [ 46.291387] sshd (8083) used greatest stack depth: 19848 bytes left Warning: Permanently added '10.128.0.207' (ECDSA) to the list of known hosts. 2019/01/28 01:33:40 parsed 1 programs 2019/01/28 01:33:42 executed programs: 0 [ 86.113339] IPVS: ftp: loaded support on port[0] = 21 [ 86.122255] IPVS: ftp: loaded support on port[0] = 21 [ 86.123102] IPVS: ftp: loaded support on port[0] = 21 [ 86.139419] IPVS: ftp: loaded support on port[0] = 21 [ 86.163983] IPVS: ftp: loaded support on port[0] = 21 [ 86.198085] IPVS: ftp: loaded support on port[0] = 21 [ 86.304864] chnl_net:caif_netlink_parms(): no params data found [ 86.354709] chnl_net:caif_netlink_parms(): no params data found [ 86.436411] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.443072] bridge0: port 1(bridge_slave_0) entered disabled state [ 86.450796] device bridge_slave_0 entered promiscuous mode [ 86.469746] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.476163] bridge0: port 1(bridge_slave_0) entered disabled state [ 86.483269] device bridge_slave_0 entered promiscuous mode [ 86.489968] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.496366] bridge0: port 2(bridge_slave_1) entered disabled state [ 86.503547] device bridge_slave_1 entered promiscuous mode [ 86.517549] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.523892] bridge0: port 2(bridge_slave_1) entered disabled state [ 86.531176] device bridge_slave_1 entered promiscuous mode [ 86.537749] chnl_net:caif_netlink_parms(): no params data found [ 86.622055] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 86.630982] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 86.639769] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 86.654441] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.660968] bridge0: port 1(bridge_slave_0) entered disabled state [ 86.669004] device bridge_slave_0 entered promiscuous mode [ 86.681056] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 86.696431] chnl_net:caif_netlink_parms(): no params data found [ 86.705613] team0: Port device team_slave_0 added [ 86.712783] team0: Port device team_slave_1 added [ 86.718176] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.724498] bridge0: port 2(bridge_slave_1) entered disabled state [ 86.731527] device bridge_slave_1 entered promiscuous mode [ 86.742887] chnl_net:caif_netlink_parms(): no params data found [ 86.792056] chnl_net:caif_netlink_parms(): no params data found [ 86.808572] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 86.829166] team0: Port device team_slave_0 added [ 86.838580] team0: Port device team_slave_1 added [ 86.867742] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 86.926864] device hsr_slave_0 entered promiscuous mode [ 86.965351] device hsr_slave_1 entered promiscuous mode [ 87.041336] team0: Port device team_slave_0 added [ 87.048257] bridge0: port 1(bridge_slave_0) entered blocking state [ 87.054616] bridge0: port 1(bridge_slave_0) entered disabled state [ 87.062266] device bridge_slave_0 entered promiscuous mode [ 87.072615] bridge0: port 2(bridge_slave_1) entered blocking state [ 87.079114] bridge0: port 2(bridge_slave_1) entered disabled state [ 87.086332] device bridge_slave_1 entered promiscuous mode [ 87.092695] bridge0: port 1(bridge_slave_0) entered blocking state [ 87.099423] bridge0: port 1(bridge_slave_0) entered disabled state [ 87.106642] device bridge_slave_0 entered promiscuous mode [ 87.118375] bridge0: port 2(bridge_slave_1) entered blocking state [ 87.124711] bridge0: port 2(bridge_slave_1) entered disabled state [ 87.132501] device bridge_slave_1 entered promiscuous mode [ 87.148256] team0: Port device team_slave_1 added [ 87.154601] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 87.163536] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 87.174770] bridge0: port 1(bridge_slave_0) entered blocking state [ 87.181356] bridge0: port 1(bridge_slave_0) entered disabled state [ 87.188487] device bridge_slave_0 entered promiscuous mode [ 87.199377] bridge0: port 2(bridge_slave_1) entered blocking state [ 87.205792] bridge0: port 2(bridge_slave_1) entered disabled state [ 87.212697] device bridge_slave_1 entered promiscuous mode [ 87.267094] device hsr_slave_0 entered promiscuous mode [ 87.315365] device hsr_slave_1 entered promiscuous mode [ 87.417186] device hsr_slave_0 entered promiscuous mode [ 87.445513] device hsr_slave_1 entered promiscuous mode [ 87.518393] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 87.560104] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 87.572174] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 87.589953] team0: Port device team_slave_0 added [ 87.597109] team0: Port device team_slave_1 added [ 87.616590] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 87.656351] team0: Port device team_slave_0 added [ 87.662645] team0: Port device team_slave_1 added [ 87.686971] team0: Port device team_slave_0 added [ 87.693407] team0: Port device team_slave_1 added [ 87.756886] device hsr_slave_0 entered promiscuous mode [ 87.795230] device hsr_slave_1 entered promiscuous mode [ 87.888455] device hsr_slave_0 entered promiscuous mode [ 87.925386] device hsr_slave_1 entered promiscuous mode [ 88.047523] device hsr_slave_0 entered promiscuous mode [ 88.095439] device hsr_slave_1 entered promiscuous mode [ 88.148035] 8021q: adding VLAN 0 to HW filter on device bond0 [ 88.186799] 8021q: adding VLAN 0 to HW filter on device team0 [ 88.212327] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 88.220677] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 88.228287] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 88.236217] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 88.243780] bridge0: port 1(bridge_slave_0) entered blocking state [ 88.250242] bridge0: port 1(bridge_slave_0) entered forwarding state [ 88.258928] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 88.276889] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 88.285970] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 88.293516] bridge0: port 2(bridge_slave_1) entered blocking state [ 88.299910] bridge0: port 2(bridge_slave_1) entered forwarding state [ 88.312577] 8021q: adding VLAN 0 to HW filter on device bond0 [ 88.322788] 8021q: adding VLAN 0 to HW filter on device bond0 [ 88.385913] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 88.393869] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 88.402505] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 88.410845] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 88.419292] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 88.427547] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 88.437361] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 88.444768] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 88.452632] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 88.469784] 8021q: adding VLAN 0 to HW filter on device team0 [ 88.479355] 8021q: adding VLAN 0 to HW filter on device team0 [ 88.487411] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 88.494389] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 88.501919] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 88.509149] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 88.524245] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 88.535668] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 88.556908] 8021q: adding VLAN 0 to HW filter on device bond0 [ 88.566628] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 88.574189] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 88.582006] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 88.589940] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 88.597487] bridge0: port 1(bridge_slave_0) entered blocking state [ 88.603811] bridge0: port 1(bridge_slave_0) entered forwarding state [ 88.610747] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 88.618806] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 88.627014] bridge0: port 1(bridge_slave_0) entered blocking state [ 88.633361] bridge0: port 1(bridge_slave_0) entered forwarding state [ 88.640651] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 88.648542] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 88.672940] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 88.681428] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 88.689607] bridge0: port 2(bridge_slave_1) entered blocking state [ 88.696035] bridge0: port 2(bridge_slave_1) entered forwarding state [ 88.702902] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 88.718616] 8021q: adding VLAN 0 to HW filter on device team0 [ 88.742325] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 88.749371] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 88.757818] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 88.767502] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 88.775164] bridge0: port 2(bridge_slave_1) entered blocking state [ 88.781551] bridge0: port 2(bridge_slave_1) entered forwarding state [ 88.788539] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 88.796696] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 88.808241] 8021q: adding VLAN 0 to HW filter on device bond0 [ 88.820068] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 88.842385] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 88.850799] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 88.866407] bridge0: port 1(bridge_slave_0) entered blocking state [ 88.872758] bridge0: port 1(bridge_slave_0) entered forwarding state [ 88.880471] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 88.901198] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 88.909771] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 88.918067] bridge0: port 2(bridge_slave_1) entered blocking state [ 88.924399] bridge0: port 2(bridge_slave_1) entered forwarding state [ 88.931472] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 88.938563] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 88.947689] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 88.955606] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 88.963277] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 88.971107] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 88.979905] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 88.990545] 8021q: adding VLAN 0 to HW filter on device bond0 [ 89.004642] 8021q: adding VLAN 0 to HW filter on device team0 [ 89.045596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 89.053912] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 89.061784] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 89.069554] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 89.078119] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 89.085804] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 89.093219] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 89.101108] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 89.109228] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 89.117097] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 89.124872] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 89.132916] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 89.140582] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 89.168449] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 89.177782] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 89.184712] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 89.194454] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 89.201764] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 89.210435] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 89.218248] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 89.226246] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 89.233859] bridge0: port 1(bridge_slave_0) entered blocking state [ 89.240241] bridge0: port 1(bridge_slave_0) entered forwarding state [ 89.247269] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 89.254885] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 89.262617] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 89.270380] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 89.278102] bridge0: port 2(bridge_slave_1) entered blocking state [ 89.284469] bridge0: port 2(bridge_slave_1) entered forwarding state [ 89.291463] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 89.299295] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 89.309006] 8021q: adding VLAN 0 to HW filter on device team0 [ 89.323051] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 89.333667] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 89.343034] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 89.350460] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 89.357893] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 89.366270] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 89.373821] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 89.381469] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 89.403095] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 89.426402] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 89.434211] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 89.444244] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 89.452282] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 89.460064] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 89.468751] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 89.476781] bridge0: port 1(bridge_slave_0) entered blocking state [ 89.483142] bridge0: port 1(bridge_slave_0) entered forwarding state [ 89.490258] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 89.497941] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 89.506272] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 89.513206] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 89.541117] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 89.552827] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 89.574551] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 89.582035] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 89.590215] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 89.598058] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 89.607248] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 89.614704] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 89.622678] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 89.630371] bridge0: port 2(bridge_slave_1) entered blocking state [ 89.636808] bridge0: port 2(bridge_slave_1) entered forwarding state [ 89.643605] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 89.651623] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 89.682150] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 89.692438] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 89.701532] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 89.709965] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 89.718553] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 89.752225] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 89.768827] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 89.781852] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 89.793626] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 89.801521] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 89.810315] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 89.817976] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 89.827465] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 89.837285] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 89.941567] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 91.526651] [ 91.528315] ===================================================== [ 91.534532] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected [ 91.541264] 5.0.0-rc3+ #48 Not tainted [ 91.545136] ----------------------------------------------------- [ 91.551357] syz-executor5/8205 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: [ 91.558540] 0000000011783c53 (&ctx->fd_wqh){....}, at: aio_poll+0x7b9/0x14e0 [ 91.565747] [ 91.565747] and this task is already holding: [ 91.571718] 00000000b36c0b41 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll+0x790/0x14e0 [ 91.579937] which would create a new lock dependency: [ 91.585111] (&(&ctx->ctx_lock)->rlock){..-.} -> (&ctx->fd_wqh){....} [ 91.591786] [ 91.591786] but this new dependency connects a SOFTIRQ-irq-safe lock: [ 91.599812] (&(&ctx->ctx_lock)->rlock){..-.} [ 91.599821] [ 91.599821] ... which became SOFTIRQ-irq-safe at: [ 91.610613] lock_acquire+0x1db/0x570 [ 91.614491] _raw_spin_lock_irq+0x60/0x80 [ 91.618706] free_ioctx_users+0xa7/0x6e0 [ 91.622834] percpu_ref_switch_to_atomic_rcu+0x50c/0x6b0 [ 91.628352] rcu_process_callbacks+0xc4a/0x1680 [ 91.633086] __do_softirq+0x30b/0xb11 [ 91.636954] irq_exit+0x180/0x1d0 [ 91.640473] smp_apic_timer_interrupt+0x1b7/0x760 [ 91.645394] apic_timer_interrupt+0xf/0x20 [ 91.649705] _raw_spin_unlock_irqrestore+0x95/0xe0 [ 91.654710] __debug_object_init+0x1c0/0x12d0 [ 91.659283] debug_object_activate+0x348/0x550 [ 91.663931] __call_rcu.constprop.0+0x9f/0x920 [ 91.668580] call_rcu+0xb/0x10 [ 91.671842] memcg_update_all_caches+0x82/0x130 [ 91.676581] mem_cgroup_css_alloc+0x144c/0x1a60 [ 91.681322] cgroup_apply_control_enable+0x54d/0xf20 [ 91.686525] cgroup_mkdir+0x878/0x1270 [ 91.690492] kernfs_iop_mkdir+0x150/0x1e0 [ 91.694708] vfs_mkdir+0x433/0x690 [ 91.698315] do_mkdirat+0x271/0x2f0 [ 91.702012] __x64_sys_mkdir+0x5c/0x80 [ 91.705987] do_syscall_64+0x1a3/0x800 [ 91.709952] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.715203] [ 91.715203] to a SOFTIRQ-irq-unsafe lock: [ 91.720801] (&ctx->fault_pending_wqh){+.+.} [ 91.720808] [ 91.720808] ... which became SOFTIRQ-irq-unsafe at: [ 91.731662] ... [ 91.731674] lock_acquire+0x1db/0x570 [ 91.737436] _raw_spin_lock+0x2f/0x40 [ 91.741305] userfaultfd_release+0x609/0x8c0 [ 91.745788] __fput+0x3c5/0xb10 [ 91.749148] ____fput+0x16/0x20 [ 91.752494] task_work_run+0x1f4/0x2b0 [ 91.756450] get_signal+0x168d/0x19b0 [ 91.760320] do_signal+0x91/0x1ea0 [ 91.763926] exit_to_usermode_loop+0x2f7/0x3b0 [ 91.768587] do_syscall_64+0x696/0x800 [ 91.772553] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.777801] [ 91.777801] other info that might help us debug this: [ 91.777801] [ 91.785936] Chain exists of: [ 91.785936] &(&ctx->ctx_lock)->rlock --> &ctx->fd_wqh --> &ctx->fault_pending_wqh [ 91.785936] [ 91.798068] Possible interrupt unsafe locking scenario: [ 91.798068] [ 91.804971] CPU0 CPU1 [ 91.809623] ---- ---- [ 91.814272] lock(&ctx->fault_pending_wqh); [ 91.818658] local_irq_disable(); [ 91.824687] lock(&(&ctx->ctx_lock)->rlock); [ 91.831675] lock(&ctx->fd_wqh); [ 91.837624] [ 91.840376] lock(&(&ctx->ctx_lock)->rlock); [ 91.845028] [ 91.845028] *** DEADLOCK *** [ 91.845028] [ 91.851076] 1 lock held by syz-executor5/8205: [ 91.855649] #0: 00000000b36c0b41 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll+0x790/0x14e0 [ 91.864357] [ 91.864357] the dependencies between SOFTIRQ-irq-safe lock and the holding lock: [ 91.873343] -> (&(&ctx->ctx_lock)->rlock){..-.} { [ 91.878166] IN-SOFTIRQ-W at: [ 91.881438] lock_acquire+0x1db/0x570 [ 91.886899] _raw_spin_lock_irq+0x60/0x80 [ 91.892687] free_ioctx_users+0xa7/0x6e0 [ 91.898378] percpu_ref_switch_to_atomic_rcu+0x50c/0x6b0 [ 91.905466] rcu_process_callbacks+0xc4a/0x1680 [ 91.911773] __do_softirq+0x30b/0xb11 [ 91.917204] irq_exit+0x180/0x1d0 [ 91.922287] smp_apic_timer_interrupt+0x1b7/0x760 [ 91.928768] apic_timer_interrupt+0xf/0x20 [ 91.934649] _raw_spin_unlock_irqrestore+0x95/0xe0 [ 91.941211] __debug_object_init+0x1c0/0x12d0 [ 91.947347] debug_object_activate+0x348/0x550 [ 91.953569] __call_rcu.constprop.0+0x9f/0x920 [ 91.959782] call_rcu+0xb/0x10 [ 91.964606] memcg_update_all_caches+0x82/0x130 [ 91.970923] mem_cgroup_css_alloc+0x144c/0x1a60 [ 91.977224] cgroup_apply_control_enable+0x54d/0xf20 [ 91.983959] cgroup_mkdir+0x878/0x1270 [ 91.989495] kernfs_iop_mkdir+0x150/0x1e0 [ 91.995274] vfs_mkdir+0x433/0x690 [ 92.000454] do_mkdirat+0x271/0x2f0 [ 92.005763] __x64_sys_mkdir+0x5c/0x80 [ 92.011293] do_syscall_64+0x1a3/0x800 [ 92.016846] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.023662] INITIAL USE at: [ 92.026845] lock_acquire+0x1db/0x570 [ 92.032199] _raw_spin_lock_irq+0x60/0x80 [ 92.037892] aio_poll+0x790/0x14e0 [ 92.042981] io_submit_one+0xc39/0x1050 [ 92.048520] __x64_sys_io_submit+0x1c4/0x5d0 [ 92.054484] do_syscall_64+0x1a3/0x800 [ 92.059923] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.066655] } [ 92.068446] ... key at: [] __key.51949+0x0/0x40 [ 92.075170] ... acquired at: [ 92.078260] lock_acquire+0x1db/0x570 [ 92.082217] _raw_spin_lock+0x2f/0x40 [ 92.086178] aio_poll+0x7b9/0x14e0 [ 92.089901] io_submit_one+0xc39/0x1050 [ 92.094036] __x64_sys_io_submit+0x1c4/0x5d0 [ 92.098597] do_syscall_64+0x1a3/0x800 [ 92.102642] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.107994] [ 92.109602] [ 92.109602] the dependencies between the lock to be acquired [ 92.109605] and SOFTIRQ-irq-unsafe lock: [ 92.120974] -> (&ctx->fault_pending_wqh){+.+.} { [ 92.125806] HARDIRQ-ON-W at: [ 92.129165] lock_acquire+0x1db/0x570 [ 92.134771] _raw_spin_lock+0x2f/0x40 [ 92.140375] userfaultfd_release+0x609/0x8c0 [ 92.146594] __fput+0x3c5/0xb10 [ 92.151700] ____fput+0x16/0x20 [ 92.156820] task_work_run+0x1f4/0x2b0 [ 92.162535] get_signal+0x168d/0x19b0 [ 92.168159] do_signal+0x91/0x1ea0 [ 92.173526] exit_to_usermode_loop+0x2f7/0x3b0 [ 92.179955] do_syscall_64+0x696/0x800 [ 92.185660] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.192656] SOFTIRQ-ON-W at: [ 92.196015] lock_acquire+0x1db/0x570 [ 92.201630] _raw_spin_lock+0x2f/0x40 [ 92.207250] userfaultfd_release+0x609/0x8c0 [ 92.213469] __fput+0x3c5/0xb10 [ 92.218553] ____fput+0x16/0x20 [ 92.223651] task_work_run+0x1f4/0x2b0 [ 92.229349] get_signal+0x168d/0x19b0 [ 92.234962] do_signal+0x91/0x1ea0 [ 92.240325] exit_to_usermode_loop+0x2f7/0x3b0 [ 92.246733] do_syscall_64+0x696/0x800 [ 92.252433] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.259423] INITIAL USE at: [ 92.262699] lock_acquire+0x1db/0x570 [ 92.268234] _raw_spin_lock+0x2f/0x40 [ 92.273753] userfaultfd_ctx_read+0x690/0x2060 [ 92.280053] userfaultfd_read+0x1e0/0x2c0 [ 92.285935] __vfs_read+0x116/0xb20 [ 92.291295] vfs_read+0x194/0x3e0 [ 92.296465] ksys_read+0x105/0x260 [ 92.301724] __x64_sys_read+0x73/0xb0 [ 92.307254] do_syscall_64+0x1a3/0x800 [ 92.312871] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.319772] } [ 92.321650] ... key at: [] __key.44850+0x0/0x40 [ 92.328465] ... acquired at: [ 92.331645] _raw_spin_lock+0x2f/0x40 [ 92.335603] userfaultfd_ctx_read+0x690/0x2060 [ 92.340339] userfaultfd_read+0x1e0/0x2c0 [ 92.344645] __vfs_read+0x116/0xb20 [ 92.348427] vfs_read+0x194/0x3e0 [ 92.352036] ksys_read+0x105/0x260 [ 92.355729] __x64_sys_read+0x73/0xb0 [ 92.359684] do_syscall_64+0x1a3/0x800 [ 92.363736] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.369083] [ 92.370687] -> (&ctx->fd_wqh){....} { [ 92.374468] INITIAL USE at: [ 92.377650] lock_acquire+0x1db/0x570 [ 92.382994] _raw_spin_lock_irq+0x60/0x80 [ 92.388686] userfaultfd_ctx_read+0x25e/0x2060 [ 92.394812] userfaultfd_read+0x1e0/0x2c0 [ 92.400520] __vfs_read+0x116/0xb20 [ 92.405702] vfs_read+0x194/0x3e0 [ 92.410707] ksys_read+0x105/0x260 [ 92.415789] __x64_sys_read+0x73/0xb0 [ 92.421143] do_syscall_64+0x1a3/0x800 [ 92.426589] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.433324] } [ 92.435131] ... key at: [] __key.44853+0x0/0x40 [ 92.441864] ... acquired at: [ 92.444962] lock_acquire+0x1db/0x570 [ 92.448931] _raw_spin_lock+0x2f/0x40 [ 92.452887] aio_poll+0x7b9/0x14e0 [ 92.456583] io_submit_one+0xc39/0x1050 [ 92.460712] __x64_sys_io_submit+0x1c4/0x5d0 [ 92.465282] do_syscall_64+0x1a3/0x800 [ 92.469336] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.474673] [ 92.476284] [ 92.476284] stack backtrace: [ 92.480764] CPU: 1 PID: 8205 Comm: syz-executor5 Not tainted 5.0.0-rc3+ #48 [ 92.487846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.497188] Call Trace: [ 92.499760] dump_stack+0x1db/0x2d0 [ 92.503467] ? dump_stack_print_info.cold+0x20/0x20 [ 92.508477] ? print_shortest_lock_dependencies.cold+0x176/0x1f0 [ 92.514612] ? vprintk_func+0x86/0x189 [ 92.518499] check_usage.cold+0x5e2/0x917 [ 92.522644] ? check_usage_forwards+0x3e0/0x3e0 [ 92.527308] ? __lock_acquire+0x572/0x4a30 [ 92.531532] ? lockdep_on+0x50/0x50 [ 92.535149] ? lock_pin_lock+0x3a0/0x3a0 [ 92.539192] ? mark_held_locks+0x100/0x100 [ 92.543407] ? save_trace+0x290/0x290 [ 92.547204] __lock_acquire+0x2169/0x4a30 [ 92.551353] ? __lock_acquire+0x2169/0x4a30 [ 92.555659] ? add_lock_to_list.isra.0+0x450/0x450 [ 92.560572] ? mark_held_locks+0x100/0x100 [ 92.564788] ? add_wait_queue+0x1bc/0x300 [ 92.568923] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 92.574024] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 92.579131] ? lockdep_hardirqs_on+0x415/0x5d0 [ 92.583709] ? trace_hardirqs_on+0xbd/0x310 [ 92.588022] ? kasan_check_read+0x11/0x20 [ 92.592165] ? add_wait_queue+0x1bc/0x300 [ 92.596295] ? trace_hardirqs_off_caller+0x300/0x300 [ 92.601388] ? do_raw_spin_trylock+0x270/0x270 [ 92.605971] ? kasan_check_read+0x11/0x20 [ 92.610139] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 92.615243] ? add_wait_queue+0x1bc/0x300 [ 92.619389] ? wait_woken+0x250/0x250 [ 92.623170] ? __fget+0x499/0x710 [ 92.626613] lock_acquire+0x1db/0x570 [ 92.630412] ? aio_poll+0x7b9/0x14e0 [ 92.634107] ? lock_release+0xc40/0xc40 [ 92.638084] ? rwlock_bug.part.0+0x90/0x90 [ 92.642309] ? trace_hardirqs_on_caller+0x310/0x310 [ 92.647316] ? add_lock_to_list.isra.0+0x450/0x450 [ 92.652248] _raw_spin_lock+0x2f/0x40 [ 92.656035] ? aio_poll+0x7b9/0x14e0 [ 92.659731] aio_poll+0x7b9/0x14e0 [ 92.663255] ? init_once_userfaultfd_ctx+0xd0/0xd0 [ 92.668166] ? free_ioctx_users+0x6e0/0x6e0 [ 92.672469] ? aio_setup_rw+0x180/0x180 [ 92.676425] ? find_held_lock+0x35/0x120 [ 92.680468] ? __might_fault+0x12b/0x1e0 [ 92.684529] ? lock_acquire+0x1db/0x570 [ 92.688508] ? lock_downgrade+0x910/0x910 [ 92.692644] ? lock_release+0xc40/0xc40 [ 92.696599] ? lock_downgrade+0x910/0x910 [ 92.700740] ? kasan_check_read+0x11/0x20 [ 92.704891] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 92.710160] io_submit_one+0xc39/0x1050 [ 92.714114] ? io_submit_one+0xc39/0x1050 [ 92.718254] ? aio_poll+0x14e0/0x14e0 [ 92.722055] ? lock_downgrade+0x910/0x910 [ 92.726202] __x64_sys_io_submit+0x1c4/0x5d0 [ 92.730613] ? __ia32_sys_io_destroy+0x590/0x590 [ 92.735371] ? do_syscall_64+0x8c/0x800 [ 92.739344] ? lockdep_hardirqs_on+0x415/0x5d0 [ 92.743909] ? trace_hardirqs_on+0xbd/0x310 [ 92.748214] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.753734] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.759078] ? trace_hardirqs_off_caller+0x300/0x300 [ 92.764173] ? ret_from_fork+0x15/0x50 [ 92.768056] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.772793] do_syscall_64+0x1a3/0x800 [ 92.776668] ? __ia32_sys_io_destroy+0x590/0x590 [ 92.781406] ? do_syscall_64+0x1a3/0x800 [ 92.785462] ? syscall_return_slowpath+0x5f0/0x5f0 [ 92.790381] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 92.795378] ? __switch_to_asm+0x34/0x70 [ 92.799422] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 92.804259] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.809451] RIP: 0033:0x458099 [ 92.812626] Code: 6d 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 92.831514] RSP: 002b:00007f27be669c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 [ 92.839203] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099 [ 92.846459] RDX: 0000000020000600 RSI: 0000000000000001 RDI: 00007f27be68c000 [ 92.853718] RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000 [ 92.861001] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f27be66a6d4 [ 92.868262] R13: 00000000004bf2cb R14: 00000000004d0af8 R15: 00000000ffffffff 2019/01/28 01:33:49 executed programs: 13 [ 92.958444] kobject: 'loop5' (0000000020ed5d29): kobject_uevent_env [ 92.965080] kobject: 'loop5' (0000000020ed5d29): fill_kobj_path: path = '/devices/virtual/block/loop5' [ 93.006775] kobject: 'loop1' (0000000090516c5d): kobject_uevent_env [ 93.018499] kobject: 'loop1' (0000000090516c5d): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 93.030241] kobject: 'loop2' (000000002d56a391): kobject_uevent_env [ 93.037291] kobject: 'loop2' (000000002d56a391): fill_kobj_path: path = '/devices/virtual/block/loop2' [ 93.047300] kobject: 'loop0' (0000000045eb9d2d): kobject_uevent_env [ 93.053788] kobject: 'loop0' (0000000045eb9d2d): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 93.064052] kobject: 'loop4' (0000000086be7a8c): kobject_uevent_env [ 93.071247] kobject: 'loop4' (0000000086be7a8c): fill_kobj_path: path = '/devices/virtual/block/loop4' [ 93.082475] kobject: 'loop3' (00000000c5d1ba62): kobject_uevent_env [ 93.089077] kobject: 'loop3' (00000000c5d1ba62): fill_kobj_path: path = '/devices/virtual/block/loop3' [ 93.888529] kobject: 'loop5' (0000000020ed5d29): kobject_uevent_env [ 93.895039] kobject: 'loop5' (0000000020ed5d29): fill_kobj_path: path = '/devices/virtual/block/loop5' [ 93.919085] kobject: 'loop1' (0000000090516c5d): kobject_uevent_env [ 93.939085] kobject: 'loop1' (0000000090516c5d): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 93.959310] kobject: 'loop2' (000000002d56a391): kobject_uevent_env [ 93.968951] kobject: 'loop2' (000000002d56a391): fill_kobj_path: path = '/devices/virtual/block/loop2' [ 93.980412] kobject: 'loop3' (00000000c5d1ba62): kobject_uevent_env [ 93.987310] kobject: 'loop3' (00000000c5d1ba62): fill_kobj_path: path = '/devices/virtual/block/loop3' [ 94.000023] kobject: 'loop0' (0000000045eb9d2d): kobject_uevent_env [ 94.007184] kobject: 'loop0' (0000000045eb9d2d): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 94.020209] kobject: 'loop4' (0000000086be7a8c): kobject_uevent_env [ 94.026777] kobject: 'loop4' (0000000086be7a8c): fill_kobj_path: path = '/devices/virtual/block/loop4' [ 94.840564] kobject: 'loop5' (0000000020ed5d29): kobject_uevent_env [ 94.849973] kobject: 'loop5' (0000000020ed5d29): fill_kobj_path: path = '/devices/virtual/block/loop5' [ 94.864240] kobject: 'loop1' (0000000090516c5d): kobject_uevent_env [ 94.874425] kobject: 'loop1' (0000000090516c5d): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 94.890841] kobject: 'loop0' (0000000045eb9d2d): kobject_uevent_env [ 94.905268] kobject: 'loop0' (0000000045eb9d2d): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 94.920387] kobject: 'loop2' (000000002d56a391): kobject_uevent_env [ 94.927102] kobject: 'loop2' (000000002d56a391): fill_kobj_path: path = '/devices/virtual/block/loop2' [ 94.938092] kobject: 'loop3' (00000000c5d1ba62): kobject_uevent_env [ 94.944566] kobject: 'loop3' (00000000c5d1ba62): fill_kobj_path: path = '/devices/virtual/block/loop3' [ 94.954835] kobject: 'loop4' (0000000086be7a8c): kobject_uevent_env [ 94.961426] kobject: 'loop4' (0000000086be7a8c): fill_kobj_path: path = '/devices/virtual/block/loop4' [ 95.788612] kobject: 'loop5' (0000000020ed5d29): kobject_uevent_env [ 95.796351] kobject: 'loop5' (0000000020ed5d29): fill_kobj_path: path = '/devices/virtual/block/loop5' [ 95.809653] kobject: 'loop2' (000000002d56a391): kobject_uevent_env [ 95.817249] kobject: 'loop2' (000000002d56a391): fill_kobj_path: path = '/devices/virtual/block/loop2' [ 95.832774] kobject: 'loop0' (0000000045eb9d2d): kobject_uevent_env [ 95.847837] kobject: 'loop0' (0000000045eb9d2d): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 95.864245] kobject: 'loop1' (0000000090516c5d): kobject_uevent_env [ 95.871033] kobject: 'loop1' (0000000090516c5d): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 95.881608] kobject: 'loop4' (0000000086be7a8c): kobject_uevent_env [ 95.888112] kobject: 'loop4' (0000000086be7a8c): fill_kobj_path: path = '/devices/virtual/block/loop4' [ 95.899818] kobject: 'loop3' (00000000c5d1ba62): kobject_uevent_env [ 95.906327] kobject: 'loop3' (00000000c5d1ba62): fill_kobj_path: path = '/devices/virtual/block/loop3' [ 96.719366] kobject: 'loop5' (0000000020ed5d29): kobject_uevent_env [ 96.726035] kobject: 'loop5' (0000000020ed5d29): fill_kobj_path: path = '/devices/virtual/block/loop5' [ 96.742651] kobject: 'loop0' (0000000045eb9d2d): kobject_uevent_env [ 96.759652] kobject: 'loop0' (0000000045eb9d2d): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 96.782761] kobject: 'loop2' (000000002d56a391): kobject_uevent_env [ 96.789353] kobject: 'loop2' (000000002d56a391): fill_kobj_path: path = '/devices/virtual/block/loop2' [ 96.800077] kobject: 'loop3' (00000000c5d1ba62): kobject_uevent_env [ 96.807173] kobject: 'loop3' (00000000c5d1ba62): fill_kobj_path: path = '/devices/virtual/block/loop3' [ 96.817001] kobject: 'loop1' (0000000090516c5d): kobject_uevent_env [ 96.823456] kobject: 'loop1' (0000000090516c5d): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 96.834407] kobject: 'loop4' (0000000086be7a8c): kobject_uevent_env [ 96.840878] kobject: 'loop4' (0000000086be7a8c): fill_kobj_path: path = '/devices/virtual/block/loop4' [ 97.648828] kobject: 'loop5' (0000000020ed5d29): kobject_uevent_env [ 97.655830] kobject: 'loop5' (0000000020ed5d29): fill_kobj_path: path = '/devices/virtual/block/loop5' [