[ 8.881382][ T2616] 8021q: adding VLAN 0 to HW filter on device bond0 [ 8.889240][ T2616] eql: remember to turn off Van-Jacobson compression on your slave devices [ 8.916492][ T1026] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 8.921560][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.209' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.860446][ T3038] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.876665][ T3040] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.888767][ T3042] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.900225][ T3043] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.909310][ T3044] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.919776][ T3045] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.932454][ T3046] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.941021][ T3048] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.951903][ T3050] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 27.959127][ T3051] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.252697][ T3099] nbd: failed to add new device executing program executing program executing program executing program [ 28.315129][ T3107] [ 28.315632][ T3107] ====================================================== [ 28.317001][ T3107] WARNING: possible circular locking dependency detected [ 28.318597][ T3107] 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Not tainted [ 28.320110][ T3107] ------------------------------------------------------ [ 28.321509][ T3107] syz-executor387/3107 is trying to acquire lock: [ 28.322920][ T3107] ffff0000c58760a8 ((&sq->pending_timer)){+.-.}-{0:0}, at: del_timer_sync+0x70/0x1ac [ 28.324944][ T3107] [ 28.324944][ T3107] but task is already holding lock: [ 28.326443][ T3107] ffff80000ef84d98 (&blkcg->lock){....}-{2:2}, at: blkcg_deactivate_policy+0xdc/0x198 [ 28.328562][ T3107] [ 28.328562][ T3107] which lock already depends on the new lock. [ 28.328562][ T3107] [ 28.330830][ T3107] [ 28.330830][ T3107] the existing dependency chain (in reverse order) is: [ 28.332608][ T3107] [ 28.332608][ T3107] -> #2 (&blkcg->lock){....}-{2:2}: [ 28.334159][ T3107] _raw_spin_lock+0x54/0x6c [ 28.335244][ T3107] blkg_create+0x3d0/0x668 [ 28.336250][ T3107] blkcg_init_queue+0x7c/0x1d8 [ 28.337367][ T3107] __alloc_disk_node+0x16c/0x29c [ 28.338535][ T3107] __blk_alloc_disk+0x40/0xb4 [ 28.339700][ T3107] brd_alloc+0x190/0x2c8 [ 28.340673][ T3107] brd_init+0xf0/0x1ac [ 28.341614][ T3107] do_one_initcall+0x118/0x22c [ 28.342844][ T3107] do_initcall_level+0xac/0xe4 [ 28.344007][ T3107] do_initcalls+0x58/0xa8 [ 28.345108][ T3107] do_basic_setup+0x20/0x2c [ 28.346270][ T3107] kernel_init_freeable+0xb8/0x148 [ 28.347528][ T3107] kernel_init+0x24/0x290 [ 28.348587][ T3107] ret_from_fork+0x10/0x20 [ 28.349623][ T3107] [ 28.349623][ T3107] -> #1 (&q->queue_lock){..-.}-{2:2}: [ 28.351198][ T3107] _raw_spin_lock_irq+0x70/0x9c [ 28.352396][ T3107] throtl_pending_timer_fn+0x94/0x39c [ 28.353644][ T3107] call_timer_fn+0x90/0x144 [ 28.354711][ T3107] __run_timers+0x280/0x374 [ 28.355748][ T3107] run_timer_softirq+0x34/0x5c [ 28.356767][ T3107] _stext+0x168/0x37c [ 28.357723][ T3107] ____do_softirq+0x14/0x20 [ 28.358782][ T3107] call_on_irq_stack+0x2c/0x54 [ 28.360052][ T3107] do_softirq_own_stack+0x20/0x2c [ 28.361086][ T3107] invoke_softirq+0x70/0xbc [ 28.361992][ T3107] __irq_exit_rcu+0xf0/0x140 [ 28.362825][ T3107] irq_exit_rcu+0x10/0x40 [ 28.363625][ T3107] el1_interrupt+0x38/0x68 [ 28.364693][ T3107] el1h_64_irq_handler+0x18/0x24 [ 28.365802][ T3107] el1h_64_irq+0x64/0x68 [ 28.367030][ T3107] arch_local_irq_enable+0xc/0x18 [ 28.368350][ T3107] default_idle_call+0x48/0xb8 [ 28.369511][ T3107] do_idle+0x108/0x2d8 [ 28.370486][ T3107] cpu_startup_entry+0x24/0x28 [ 28.371623][ T3107] secondary_start_kernel+0x154/0x17c [ 28.372899][ T3107] __secondary_switched+0xb0/0xb4 [ 28.374114][ T3107] [ 28.374114][ T3107] -> #0 ((&sq->pending_timer)){+.-.}-{0:0}: [ 28.375881][ T3107] __lock_acquire+0x1530/0x30a4 [ 28.377073][ T3107] lock_acquire+0x100/0x1f8 [ 28.378152][ T3107] del_timer_sync+0x98/0x1ac [ 28.379313][ T3107] throtl_pd_free+0x20/0x48 [ 28.380407][ T3107] blkcg_deactivate_policy+0x124/0x198 [ 28.381603][ T3107] blk_throtl_exit+0x48/0x80 [ 28.382709][ T3107] blkcg_init_queue+0x198/0x1d8 [ 28.383813][ T3107] __alloc_disk_node+0x16c/0x29c [ 28.384933][ T3107] __blk_mq_alloc_disk+0xbc/0x12c [ 28.386206][ T3107] nbd_dev_add+0x1c0/0x3a4 [ 28.387221][ T3107] nbd_genl_connect+0x2ec/0xcb8 [ 28.388291][ T3107] genl_rcv_msg+0x4bc/0x558 [ 28.389363][ T3107] netlink_rcv_skb+0xe4/0x1d0 [ 28.390504][ T3107] genl_rcv+0x38/0x50 [ 28.391400][ T3107] netlink_unicast_kernel+0xfc/0x1dc [ 28.392632][ T3107] netlink_unicast+0x164/0x248 [ 28.393728][ T3107] netlink_sendmsg+0x484/0x584 [ 28.394855][ T3107] ____sys_sendmsg+0x2f8/0x440 [ 28.395980][ T3107] __sys_sendmsg+0x1ac/0x228 [ 28.397031][ T3107] __arm64_sys_sendmsg+0x2c/0x3c [ 28.398227][ T3107] el0_svc_common+0x138/0x220 [ 28.399253][ T3107] do_el0_svc+0x48/0x164 [ 28.400323][ T3107] el0_svc+0x58/0x150 [ 28.401261][ T3107] el0t_64_sync_handler+0x84/0xf0 [ 28.402440][ T3107] el0t_64_sync+0x18c/0x190 [ 28.403488][ T3107] [ 28.403488][ T3107] other info that might help us debug this: [ 28.403488][ T3107] [ 28.405697][ T3107] Chain exists of: [ 28.405697][ T3107] (&sq->pending_timer) --> &q->queue_lock --> &blkcg->lock [ 28.405697][ T3107] [ 28.408426][ T3107] Possible unsafe locking scenario: [ 28.408426][ T3107] [ 28.409915][ T3107] CPU0 CPU1 [ 28.411055][ T3107] ---- ---- [ 28.412284][ T3107] lock(&blkcg->lock); [ 28.413208][ T3107] lock(&q->queue_lock); [ 28.414742][ T3107] lock(&blkcg->lock); [ 28.416304][ T3107] lock((&sq->pending_timer)); [ 28.417346][ T3107] [ 28.417346][ T3107] *** DEADLOCK *** [ 28.417346][ T3107] [ 28.419039][ T3107] 4 locks held by syz-executor387/3107: [ 28.420281][ T3107] #0: ffff80000d803c88 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 [ 28.421677][ T3107] #1: ffff80000d803b98 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x80/0x558 [ 28.423164][ T3107] #2: ffff0000c5e04210 (&q->queue_lock){..-.}-{2:2}, at: blkcg_deactivate_policy+0x98/0x198 [ 28.425163][ T3107] #3: ffff80000ef84d98 (&blkcg->lock){....}-{2:2}, at: blkcg_deactivate_policy+0xdc/0x198 [ 28.427358][ T3107] [ 28.427358][ T3107] stack backtrace: [ 28.428594][ T3107] CPU: 1 PID: 3107 Comm: syz-executor387 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 [ 28.430817][ T3107] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 [ 28.433106][ T3107] Call trace: [ 28.433867][ T3107] dump_backtrace+0x1c4/0x1f0 [ 28.434965][ T3107] show_stack+0x2c/0x54 [ 28.435989][ T3107] dump_stack_lvl+0x104/0x16c [ 28.436995][ T3107] dump_stack+0x1c/0x58 [ 28.437766][ T3107] print_circular_bug+0x2c4/0x2c8 [ 28.438740][ T3107] check_noncircular+0x14c/0x154 [ 28.439864][ T3107] __lock_acquire+0x1530/0x30a4 [ 28.440889][ T3107] lock_acquire+0x100/0x1f8 [ 28.441888][ T3107] del_timer_sync+0x98/0x1ac [ 28.442896][ T3107] throtl_pd_free+0x20/0x48 [ 28.443823][ T3107] blkcg_deactivate_policy+0x124/0x198 [ 28.444993][ T3107] blk_throtl_exit+0x48/0x80 [ 28.445954][ T3107] blkcg_init_queue+0x198/0x1d8 [ 28.447079][ T3107] __alloc_disk_node+0x16c/0x29c [ 28.448268][ T3107] __blk_mq_alloc_disk+0xbc/0x12c [ 28.449341][ T3107] nbd_dev_add+0x1c0/0x3a4 [ 28.450352][ T3107] nbd_genl_connect+0x2ec/0xcb8 [ 28.451431][ T3107] genl_rcv_msg+0x4bc/0x558 [ 28.452458][ T3107] netlink_rcv_skb+0xe4/0x1d0 [ 28.453542][ T3107] genl_rcv+0x38/0x50 [ 28.454453][ T3107] netlink_unicast_kernel+0xfc/0x1dc [ 28.455651][ T3107] netlink_unicast+0x164/0x248 [ 28.456739][ T3107] netlink_sendmsg+0x484/0x584 [ 28.457737][ T3107] ____sys_sendmsg+0x2f8/0x440 [ 28.458788][ T3107] __sys_sendmsg+0x1ac/0x228 [ 28.460070][ T3107] __arm64_sys_sendmsg+0x2c/0x3c [ 28.461160][ T3107] el0_svc_common+0x138/0x220 [ 28.462232][ T3107] do_el0_svc+0x48/0x164 [ 28.463121][ T3107] el0_svc+0x58/0x150 [ 28.463831][ T3107] el0t_64_sync_handler+0x84/0xf0 [ 28.464681][ T3107] el0t_64_sync+0x18c/0x190 [ 28.467263][ T3107] nbd: failed to add new device executing program executing program executing program executing program [ 28.495419][ T3115] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.002653][ T3238] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.126231][ T3265] nbd: failed to add new device executing program [ 29.132368][ T3266] nbd: failed to add new device executing program executing program [ 29.149331][ T3273] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.721983][ T3406] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.069449][ T3490] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.843989][ T3663] nbd: failed to add new device executing program executing program [ 30.855751][ T3669] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program [ 30.909839][ T3685] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.006761][ T3710] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.228665][ T3758] nbd: failed to add new device executing program [ 31.233387][ T3759] nbd: failed to add new device executing program executing program executing program executing program executing program executing program [ 31.282689][ T3774] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.618447][ T3852] nbd: failed to add new device executing program executing program executing program [ 31.640039][ T3858] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.055356][ T3945] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.404678][ T4020] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program [ 32.459901][ T4034] nbd: failed to add new device [ 32.465920][ T4035] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.594685][ T4062] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.672084][ T4082] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.877348][ T4118] __nla_validate_parse: 474 callbacks suppressed [ 32.877356][ T4118] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.886735][ T4120] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.894441][ T4122] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.928946][ T4124] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.934404][ T4126] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.941996][ T4128] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.949878][ T4130] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.958602][ T4132] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.970378][ T4134] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 32.979244][ T4136] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.259092][ T4202] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.363342][ T4220] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.532338][ T4258] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.921049][ T4330] nbd: failed to add new device executing program executing program executing program executing program [ 33.943261][ T4338] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.232711][ T4401] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program [ 34.313694][ T4417] nbd: failed to add new device executing program executing program [ 34.333115][ T4422] nbd: failed to add new device executing program executing program executing program executing program [ 34.366127][ T4433] nbd: failed to add new device executing program executing program [ 34.373053][ T4434] nbd: failed to add new device executing program executing program [ 34.391009][ T4441] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.697853][ T4522] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.859464][ T4561] nbd: failed to add new device executing program executing program executing program [ 34.874229][ T4565] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.090859][ T4847] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.211960][ T4873] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.480800][ T4933] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.639415][ T4969] nbd: failed to add new device executing program [ 36.644741][ T4970] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.796581][ T5005] nbd: failed to add new device executing program executing program executing program executing program [ 36.820417][ T5014] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.040045][ T5065] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.170913][ T5093] nbd: failed to add new device executing program [ 37.176920][ T5094] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.409925][ T5147] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.628634][ T5193] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.885954][ T5253] __nla_validate_parse: 508 callbacks suppressed [ 37.885961][ T5253] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.896550][ T5255] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.913784][ T5257] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.930569][ T5259] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.937025][ T5261] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.943435][ T5263] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.954909][ T5265] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.968618][ T5267] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.973992][ T5269] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program [ 37.985873][ T5271] netlink: 4 bytes leftover after parsing attributes in process `syz-executor387'. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.143974][ T5310] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program [ 38.209661][ T5327] nbd: failed to add new device executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program