Warning: Permanently added '10.128.1.186' (ECDSA) to the list of known hosts. executing program [ 34.267493] sysfs: cannot create duplicate filename '/devices/virtual/bdi/43:0' [ 34.275213] CPU: 0 PID: 8085 Comm: syz-executor821 Not tainted 4.19.211-syzkaller #0 [ 34.283091] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 34.292429] Call Trace: [ 34.295006] dump_stack+0x1fc/0x2ef [ 34.298619] sysfs_warn_dup.cold+0x1c/0x29 [ 34.302836] sysfs_create_dir_ns+0x228/0x280 [ 34.307236] ? sysfs_create_mount_point+0xb0/0xb0 [ 34.312064] ? lock_acquire+0x170/0x3c0 [ 34.316038] ? kobject_add_internal+0x134/0x9c0 [ 34.320698] ? ___sys_sendmsg+0x7bb/0x8e0 [ 34.324832] ? class_dir_child_ns_type+0x9/0x60 [ 34.329500] kobject_add_internal+0x2a5/0x9c0 [ 34.333999] kobject_add+0x150/0x1c0 [ 34.337700] ? kset_create_and_add+0x1a0/0x1a0 [ 34.342282] ? device_add+0x2c7/0x16d0 [ 34.346153] device_add+0x37b/0x16d0 [ 34.349853] ? device_check_offline+0x280/0x280 [ 34.354525] ? kfree_const+0x51/0x60 [ 34.358226] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.363224] ? kfree+0x1e2/0x210 [ 34.366593] device_create_groups_vargs+0x1f4/0x270 [ 34.371595] device_create+0xdf/0x120 [ 34.375384] ? device_create_vargs+0x50/0x50 [ 34.379799] ? pointer+0x850/0x850 [ 34.383346] bdi_register_va.part.0+0x4c/0x750 [ 34.387945] bdi_register+0x12a/0x140 [ 34.391758] ? bdi_register_va+0x80/0x80 [ 34.395833] ? vsnprintf+0x2cc/0x14f0 [ 34.399722] bdi_register_owner+0x59/0x100 [ 34.403946] __device_add_disk+0xd58/0x10c0 [ 34.408256] ? sprintf+0xc0/0x100 [ 34.411817] ? blk_alloc_devt+0x2d0/0x2d0 [ 34.415960] ? __lockdep_init_map+0x100/0x5a0 [ 34.420445] ? __lockdep_init_map+0x100/0x5a0 [ 34.424939] nbd_dev_add+0x6a9/0x890 [ 34.428664] nbd_genl_connect+0x488/0x1630 [ 34.432884] ? nbd_xmit_timeout+0x730/0x730 [ 34.437206] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 34.442508] ? validate_nla+0x270/0x820 [ 34.446490] ? nla_parse+0x1b2/0x290 [ 34.450226] genl_family_rcv_msg+0x642/0xc40 [ 34.454758] ? genl_rcv+0x40/0x40 [ 34.458216] ? genl_rcv_msg+0x12f/0x160 [ 34.462201] ? mutex_trylock+0x1a0/0x1a0 [ 34.466263] ? __radix_tree_lookup+0x216/0x370 [ 34.470847] genl_rcv_msg+0xbf/0x160 [ 34.474570] netlink_rcv_skb+0x160/0x440 [ 34.478630] ? genl_family_rcv_msg+0xc40/0xc40 [ 34.483316] ? netlink_ack+0xae0/0xae0 [ 34.487358] ? genl_rcv+0x15/0x40 [ 34.490817] genl_rcv+0x24/0x40 [ 34.494095] netlink_unicast+0x4d5/0x690 [ 34.498156] ? netlink_sendskb+0x110/0x110 [ 34.502390] ? _copy_from_iter_full+0x229/0x7c0 [ 34.507064] ? __phys_addr_symbol+0x2c/0x70 [ 34.511400] ? __check_object_size+0x17b/0x3e0 [ 34.515990] netlink_sendmsg+0x6c3/0xc50 [ 34.520047] ? aa_af_perm+0x230/0x230 [ 34.523942] ? nlmsg_notify+0x1f0/0x1f0 [ 34.527921] ? kernel_recvmsg+0x220/0x220 [ 34.532070] ? nlmsg_notify+0x1f0/0x1f0 [ 34.536047] sock_sendmsg+0xc3/0x120 [ 34.539752] ___sys_sendmsg+0x7bb/0x8e0 [ 34.543804] ? copy_msghdr_from_user+0x440/0x440 [ 34.548563] ? netlink_dump+0xc10/0xc10 [ 34.552527] ? nlmsg_notify+0x1f0/0x1f0 [ 34.556496] ? security_socket_recvmsg+0x8f/0xc0 [ 34.561237] ? __sys_recvfrom+0x2cd/0x3a0 [ 34.565389] ? __ia32_sys_send+0x100/0x100 [ 34.569660] ? __fdget+0x1a0/0x230 [ 34.573198] __x64_sys_sendmsg+0x132/0x220 [ 34.577506] ? __sys_sendmsg+0x1b0/0x1b0 [ 34.581571] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.586931] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.591932] ? do_syscall_64+0x21/0x620 [ 34.595896] do_syscall_64+0xf9/0x620 [ 34.599685] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.604858] RIP: 0033:0x7f7d92cf2b39 [ 34.608772] Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 34.627835] RSP: 002b:00007fff8dd090f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 34.635768] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7d92cf2b39 [ 34.645099] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 34.652447] RBP: 00007f7d92cb65a0 R08: 0000000000000000 R09: 0000000000000000 [ 34.659878] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7d92cb6630 [ 34.667141] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.676569] kobject_add_internal failed for 43:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 34.689756] ------------[ cut here ]------------ [ 34.695273] WARNING: CPU: 0 PID: 8085 at block/genhd.c:719 __device_add_disk.cold+0x69/0x188 [ 34.703868] Kernel panic - not syncing: panic_on_warn set ... [ 34.703868] [ 34.711262] CPU: 0 PID: 8085 Comm: syz-executor821 Not tainted 4.19.211-syzkaller #0 [ 34.719267] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 34.728642] Call Trace: [ 34.731227] dump_stack+0x1fc/0x2ef [ 34.734936] panic+0x26a/0x50e [ 34.738130] ? __warn_printk+0xf3/0xf3 [ 34.742037] ? __device_add_disk.cold+0x69/0x188 [ 34.746826] ? __probe_kernel_read+0x130/0x1b0 [ 34.751407] ? __warn.cold+0x5/0x5a [ 34.755030] ? __warn+0xe4/0x200 [ 34.758391] ? __device_add_disk.cold+0x69/0x188 [ 34.763160] __warn.cold+0x20/0x5a [ 34.766880] ? io_schedule_timeout+0x140/0x140 [ 34.771510] ? __device_add_disk.cold+0x69/0x188 [ 34.776273] report_bug+0x262/0x2b0 [ 34.779923] do_error_trap+0x1d7/0x310 [ 34.783801] ? math_error+0x310/0x310 [ 34.787670] ? __irq_work_queue_local+0x101/0x160 [ 34.792534] ? irq_work_queue+0x29/0x80 [ 34.796533] ? error_entry+0x72/0xd0 [ 34.800244] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.805264] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.810115] invalid_op+0x14/0x20 [ 34.813561] RIP: 0010:__device_add_disk.cold+0x69/0x188 [ 34.818926] Code: 02 84 c0 74 08 3c 03 0f 8e a8 00 00 00 44 8b a5 f0 05 00 00 e9 67 ad 6a fb e8 05 45 66 f9 48 c7 c7 60 75 b2 88 e8 64 76 f7 ff <0f> 0b e9 8f b9 6a fb e8 ed 44 66 f9 48 c7 c7 60 75 b2 88 e8 4c 76 [ 34.837816] RSP: 0018:ffff888090abf488 EFLAGS: 00010282 [ 34.843188] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 34.850568] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012157e83 [ 34.857824] RBP: ffff88809ea3ce00 R08: 0000000000000024 R09: 0000000000000000 [ 34.865080] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809ea3ce90 [ 34.872345] R13: ffff88809ea3d490 R14: 00000000ffffffef R15: ffff88809ea3ce04 [ 34.879770] ? vprintk_func+0x81/0x180 [ 34.883682] ? __device_add_disk.cold+0x69/0x188 [ 34.888423] ? sprintf+0xc0/0x100 [ 34.891944] ? blk_alloc_devt+0x2d0/0x2d0 [ 34.896098] ? __lockdep_init_map+0x100/0x5a0 [ 34.900600] ? __lockdep_init_map+0x100/0x5a0 [ 34.905088] nbd_dev_add+0x6a9/0x890 [ 34.908975] nbd_genl_connect+0x488/0x1630 [ 34.913205] ? nbd_xmit_timeout+0x730/0x730 [ 34.917527] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 34.922707] ? validate_nla+0x270/0x820 [ 34.926682] ? nla_parse+0x1b2/0x290 [ 34.930385] genl_family_rcv_msg+0x642/0xc40 [ 34.934780] ? genl_rcv+0x40/0x40 [ 34.938227] ? genl_rcv_msg+0x12f/0x160 [ 34.942183] ? mutex_trylock+0x1a0/0x1a0 [ 34.946232] ? __radix_tree_lookup+0x216/0x370 [ 34.950798] genl_rcv_msg+0xbf/0x160 [ 34.954521] netlink_rcv_skb+0x160/0x440 [ 34.958562] ? genl_family_rcv_msg+0xc40/0xc40 [ 34.963127] ? netlink_ack+0xae0/0xae0 [ 34.967008] ? genl_rcv+0x15/0x40 [ 34.970532] genl_rcv+0x24/0x40 [ 34.973808] netlink_unicast+0x4d5/0x690 [ 34.977865] ? netlink_sendskb+0x110/0x110 [ 34.982184] ? _copy_from_iter_full+0x229/0x7c0 [ 34.986839] ? __phys_addr_symbol+0x2c/0x70 [ 34.991142] ? __check_object_size+0x17b/0x3e0 [ 34.995723] netlink_sendmsg+0x6c3/0xc50 [ 34.999771] ? aa_af_perm+0x230/0x230 [ 35.003555] ? nlmsg_notify+0x1f0/0x1f0 [ 35.007523] ? kernel_recvmsg+0x220/0x220 [ 35.011659] ? nlmsg_notify+0x1f0/0x1f0 [ 35.015633] sock_sendmsg+0xc3/0x120 [ 35.019332] ___sys_sendmsg+0x7bb/0x8e0 [ 35.023294] ? copy_msghdr_from_user+0x440/0x440 [ 35.028116] ? netlink_dump+0xc10/0xc10 [ 35.032077] ? nlmsg_notify+0x1f0/0x1f0 [ 35.036043] ? security_socket_recvmsg+0x8f/0xc0 [ 35.040820] ? __sys_recvfrom+0x2cd/0x3a0 [ 35.044972] ? __ia32_sys_send+0x100/0x100 [ 35.049206] ? __fdget+0x1a0/0x230 [ 35.052737] __x64_sys_sendmsg+0x132/0x220 [ 35.056964] ? __sys_sendmsg+0x1b0/0x1b0 [ 35.061019] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.066366] ? trace_hardirqs_off_caller+0x6e/0x210 [ 35.071367] ? do_syscall_64+0x21/0x620 [ 35.075326] do_syscall_64+0xf9/0x620 [ 35.079124] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.084309] RIP: 0033:0x7f7d92cf2b39 [ 35.088030] Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 35.106930] RSP: 002b:00007fff8dd090f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.114633] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7d92cf2b39 [ 35.121996] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 35.129248] RBP: 00007f7d92cb65a0 R08: 0000000000000000 R09: 0000000000000000 [ 35.136517] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7d92cb6630 [ 35.143784] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.151477] Kernel Offset: disabled [ 35.155176] Rebooting in 86400 seconds..