Warning: Permanently added '10.128.1.5' (ECDSA) to the list of known hosts. executing program [ 34.889882] sysfs: cannot create duplicate filename '/devices/virtual/bdi/43:0' [ 34.897541] ------------[ cut here ]------------ [ 34.902293] WARNING: CPU: 1 PID: 7984 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 34.910501] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 34.910501] [ 34.918546] CPU: 1 PID: 7984 Comm: syz-executor326 Not tainted 4.14.306-syzkaller #0 [ 34.926405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 34.935749] Call Trace: [ 34.938323] dump_stack+0x1b2/0x281 [ 34.941948] panic+0x21d/0x451 [ 34.945124] ? add_taint.cold+0x16/0x16 [ 34.949079] ? log_store.cold+0x16/0x16 [ 34.953043] ? sysfs_warn_dup.cold+0x17/0x26 [ 34.957447] check_panic_on_warn.cold+0x19/0x35 [ 34.962104] __warn+0xdf/0x1e0 [ 34.965291] ? ist_end_non_atomic+0x10/0x10 [ 34.969597] ? sysfs_warn_dup.cold+0x17/0x26 [ 34.973998] report_bug+0x208/0x250 [ 34.977612] do_error_trap+0x195/0x2d0 [ 34.981495] ? math_error+0x2d0/0x2d0 [ 34.985303] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.990133] invalid_op+0x1b/0x40 [ 34.993581] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 34.998576] RSP: 0018:ffff8880a247f180 EFLAGS: 00010286 [ 35.003921] RAX: 0000000000000043 RBX: ffff888095428b10 RCX: 0000000000000000 [ 35.011177] RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed101448fe26 [ 35.018429] RBP: ffff888095414200 R08: 0000000000000043 R09: 0000000000000000 [ 35.025683] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880af1bf0e0 [ 35.032935] R13: ffff8880b19a8b40 R14: ffff888095428b18 R15: ffff888097b15498 [ 35.040214] sysfs_create_dir_ns+0x16f/0x1d0 [ 35.044607] kobject_add_internal+0x28b/0x930 [ 35.049098] kobject_add+0x11f/0x180 [ 35.052824] ? kset_create_and_add+0x190/0x190 [ 35.057404] device_add+0x33f/0x15c0 [ 35.061107] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 35.066556] ? kfree_const+0x33/0x40 [ 35.070265] ? device_is_dependent+0x2a0/0x2a0 [ 35.074865] ? kfree+0x1f0/0x250 [ 35.078224] device_create_groups_vargs+0x1dc/0x250 [ 35.083240] device_create_vargs+0x3a/0x50 [ 35.087475] bdi_register_va.part.0+0x35/0x650 [ 35.092057] bdi_register+0x101/0x110 [ 35.095850] ? bdi_register_va+0x80/0x80 [ 35.099901] ? vsnprintf+0x260/0x1340 [ 35.103689] bdi_register_owner+0x59/0xf0 [ 35.107827] device_add_disk+0x5bb/0xdc0 [ 35.111896] ? sprintf+0xa7/0xd0 [ 35.115247] ? blk_alloc_devt+0x310/0x310 [ 35.119379] ? __lockdep_init_map+0x100/0x560 [ 35.123863] ? __lockdep_init_map+0x100/0x560 [ 35.128459] nbd_dev_add+0x60e/0x800 [ 35.132157] ? nbd_send_cmd+0x11f0/0x11f0 [ 35.136294] nbd_genl_connect+0x36c/0x13e0 [ 35.140509] ? lock_acquire+0x170/0x3f0 [ 35.144469] ? nbd_xmit_timeout+0x500/0x500 [ 35.148793] ? validate_nla+0x192/0x5e0 [ 35.152752] ? nla_parse+0x157/0x1f0 [ 35.156451] genl_family_rcv_msg+0x572/0xb20 [ 35.160934] ? genl_rcv+0x40/0x40 [ 35.164374] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 35.169824] ? __kmalloc_node_track_caller+0x4c/0x70 [ 35.174914] ? trace_hardirqs_on+0x10/0x10 [ 35.179150] genl_rcv_msg+0xaf/0x140 [ 35.182864] netlink_rcv_skb+0x125/0x390 [ 35.186926] ? genl_family_rcv_msg+0xb20/0xb20 [ 35.191498] ? netlink_ack+0x9a0/0x9a0 [ 35.195385] ? lock_acquire+0x170/0x3f0 [ 35.199350] genl_rcv+0x24/0x40 [ 35.202612] netlink_unicast+0x437/0x610 [ 35.206669] ? netlink_sendskb+0xd0/0xd0 [ 35.210721] ? __check_object_size+0x179/0x230 [ 35.215286] netlink_sendmsg+0x651/0xbc0 [ 35.219334] ? nlmsg_notify+0x1b0/0x1b0 [ 35.223295] ? kernel_recvmsg+0x210/0x210 [ 35.227427] ? security_socket_sendmsg+0x83/0xb0 [ 35.232176] ? nlmsg_notify+0x1b0/0x1b0 [ 35.236131] sock_sendmsg+0xb5/0x100 [ 35.239835] ___sys_sendmsg+0x6c8/0x800 [ 35.243796] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 35.248540] ? netlink_dump+0xb90/0xb90 [ 35.252497] ? nlmsg_notify+0x1b0/0x1b0 [ 35.256470] ? security_socket_recvmsg+0x8b/0xc0 [ 35.261223] ? SyS_recvfrom+0x27f/0x340 [ 35.265182] ? SyS_send+0x40/0x40 [ 35.268621] ? vm_insert_page+0x7c0/0x7c0 [ 35.272754] ? __fdget+0x167/0x1f0 [ 35.276279] ? sockfd_lookup_light+0xb2/0x160 [ 35.280758] __sys_sendmsg+0xa3/0x120 [ 35.284554] ? SyS_shutdown+0x160/0x160 [ 35.288519] ? up_read+0x17/0x30 [ 35.291883] ? __do_page_fault+0x159/0xad0 [ 35.296112] SyS_sendmsg+0x27/0x40 [ 35.299636] ? __sys_sendmsg+0x120/0x120 [ 35.303680] do_syscall_64+0x1d5/0x640 [ 35.307556] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 35.312741] RIP: 0033:0x7f773fbc3b39 [ 35.316446] RSP: 002b:00007fff9da8d018 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.324138] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f773fbc3b39 [ 35.331390] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 35.338649] RBP: 00007f773fb875a0 R08: 0000000000000000 R09: 0000000000000000 [ 35.345901] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f773fb87630 [ 35.353154] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.360954] Kernel Offset: disabled [ 35.364636] Rebooting in 86400 seconds..