Warning: Permanently added '10.128.0.154' (ECDSA) to the list of known hosts. executing program [ 36.356049] netlink: 24 bytes leftover after parsing attributes in process `syz-executor975'. [ 36.366922] sysfs: cannot create duplicate filename '/devices/virtual/bdi/43:256' [ 36.375340] CPU: 0 PID: 8074 Comm: syz-executor975 Not tainted 4.19.191-syzkaller #0 [ 36.383228] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.392665] Call Trace: [ 36.395245] dump_stack+0x1fc/0x2ef [ 36.398869] sysfs_warn_dup.cold+0x1c/0x29 [ 36.403106] sysfs_create_dir_ns+0x228/0x280 [ 36.407506] ? sysfs_create_mount_point+0xb0/0xb0 [ 36.412342] ? lock_acquire+0x170/0x3c0 [ 36.416312] ? kobject_add_internal+0x134/0x9c0 [ 36.420971] ? bdi_register_va.part.0+0x35/0x730 [ 36.425720] ? class_dir_child_ns_type+0x9/0x60 [ 36.430583] kobject_add_internal+0x2a5/0x9c0 [ 36.435077] kobject_add+0x150/0x1c0 [ 36.438786] ? kset_create_and_add+0x1a0/0x1a0 [ 36.443366] ? device_add+0x2c7/0x16d0 [ 36.447255] device_add+0x37b/0x16d0 [ 36.450974] ? device_check_offline+0x280/0x280 [ 36.455634] ? kfree_const+0x51/0x60 [ 36.459338] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 36.464360] ? kfree+0x1e2/0x210 [ 36.467738] device_create_groups_vargs+0x1f4/0x270 [ 36.472762] device_create_vargs+0x3a/0x50 [ 36.476989] bdi_register_va.part.0+0x35/0x730 [ 36.481828] bdi_register+0x12a/0x140 [ 36.485633] ? bdi_register_va+0x80/0x80 [ 36.489697] ? vsnprintf+0x2cc/0x14f0 [ 36.493488] bdi_register_owner+0x59/0x100 [ 36.497715] __device_add_disk+0xd58/0x10c0 [ 36.502125] ? sprintf+0xc0/0x100 [ 36.505563] ? blk_alloc_devt+0x2d0/0x2d0 [ 36.509708] ? __lockdep_init_map+0x100/0x5a0 [ 36.514187] ? __lockdep_init_map+0x100/0x5a0 [ 36.518778] nbd_dev_add+0x6a9/0x890 [ 36.522745] nbd_genl_connect+0x488/0x1630 [ 36.527247] ? printk+0xba/0xed [ 36.530652] ? nbd_xmit_timeout+0x730/0x730 [ 36.534967] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.539692] ? ___ratelimit+0x319/0x590 [ 36.543660] ? nla_parse+0x1e7/0x290 [ 36.547359] ? nla_parse+0x1b2/0x290 [ 36.551320] genl_family_rcv_msg+0x642/0xc40 [ 36.555730] ? genl_rcv+0x40/0x40 [ 36.559181] ? genl_rcv_msg+0x12f/0x160 [ 36.563138] ? __mutex_add_waiter+0x160/0x160 [ 36.567625] ? __radix_tree_lookup+0x216/0x370 [ 36.572205] genl_rcv_msg+0xbf/0x160 [ 36.575918] netlink_rcv_skb+0x160/0x440 [ 36.579973] ? genl_family_rcv_msg+0xc40/0xc40 [ 36.584642] ? netlink_ack+0xae0/0xae0 [ 36.588552] ? genl_rcv+0x15/0x40 [ 36.591992] genl_rcv+0x24/0x40 [ 36.595345] netlink_unicast+0x4d5/0x690 [ 36.599402] ? netlink_sendskb+0x110/0x110 [ 36.603665] ? _copy_from_iter_full+0x229/0x7c0 [ 36.608322] ? __phys_addr_symbol+0x2c/0x70 [ 36.612664] ? __check_object_size+0x17b/0x3e0 [ 36.617246] netlink_sendmsg+0x6bb/0xc40 [ 36.621298] ? aa_af_perm+0x230/0x230 [ 36.625098] ? nlmsg_notify+0x1a0/0x1a0 [ 36.629073] ? kernel_recvmsg+0x220/0x220 [ 36.633245] ? nlmsg_notify+0x1a0/0x1a0 [ 36.637216] sock_sendmsg+0xc3/0x120 [ 36.640938] ___sys_sendmsg+0x7bb/0x8e0 [ 36.645070] ? copy_msghdr_from_user+0x440/0x440 [ 36.649993] ? netlink_dump+0xc10/0xc10 [ 36.653955] ? nlmsg_notify+0x1a0/0x1a0 [ 36.657924] ? security_socket_recvmsg+0x8f/0xc0 [ 36.662667] ? __sys_recvfrom+0x2cd/0x3a0 [ 36.666802] ? __ia32_sys_send+0x100/0x100 [ 36.671040] ? __fdget+0x1a0/0x230 [ 36.674583] __x64_sys_sendmsg+0x132/0x220 [ 36.678837] ? __sys_sendmsg+0x1b0/0x1b0 [ 36.682893] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.688462] ? trace_hardirqs_off_caller+0x6e/0x210 [ 36.693576] ? do_syscall_64+0x21/0x620 [ 36.697563] do_syscall_64+0xf9/0x620 [ 36.701364] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.706564] RIP: 0033:0x43fa99 [ 36.709746] 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 [ 36.728666] RSP: 002b:00007ffe09cd2ba8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 36.736458] RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000043fa99 [ 36.743721] RDX: 0000000020008000 RSI: 0000000020000400 RDI: 0000000000000003 [ 36.750976] RBP: 0000000000403500 R08: 0000000000000000 R09: 00000000004004a0 [ 36.758404] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403590 [ 36.765746] R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0 [ 36.776206] kobject_add_internal failed for 43:256 with -EEXIST, don't try to register things with the same name in the same directory. [ 36.788731] ------------[ cut here ]------------ [ 36.793904] WARNING: CPU: 0 PID: 8074 at block/genhd.c:719 __device_add_disk.cold+0x69/0x188 [ 36.802483] Kernel panic - not syncing: panic_on_warn set ... [ 36.802483] [ 36.809848] CPU: 0 PID: 8074 Comm: syz-executor975 Not tainted 4.19.191-syzkaller #0 [ 36.817715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.827053] Call Trace: [ 36.829642] dump_stack+0x1fc/0x2ef [ 36.833267] panic+0x26a/0x50e [ 36.836496] ? __warn_printk+0xf3/0xf3 [ 36.840381] ? __device_add_disk.cold+0x69/0x188 [ 36.845127] ? __probe_kernel_read+0x130/0x1b0 [ 36.849692] ? __warn.cold+0x5/0x5a [ 36.853309] ? __warn+0xe4/0x200 [ 36.856664] ? __device_add_disk.cold+0x69/0x188 [ 36.861675] __warn.cold+0x20/0x5a [ 36.865288] ? __device_add_disk.cold+0x69/0x188 [ 36.870030] report_bug+0x262/0x2b0 [ 36.873643] do_error_trap+0x1d7/0x310 [ 36.877537] ? math_error+0x310/0x310 [ 36.881326] ? irq_work_claim+0xa6/0xc0 [ 36.885300] ? irq_work_queue+0x29/0x80 [ 36.889310] ? error_entry+0x72/0xd0 [ 36.893017] ? trace_hardirqs_off_caller+0x6e/0x210 [ 36.898030] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.902884] invalid_op+0x14/0x20 [ 36.906325] RIP: 0010:__device_add_disk.cold+0x69/0x188 [ 36.911676] Code: 02 84 c0 74 08 3c 03 0f 8e a8 00 00 00 44 8b a5 b8 05 00 00 e9 12 a6 6b fb e8 a0 58 67 f9 48 c7 c7 60 6f b2 88 e8 dd 74 f7 ff <0f> 0b e9 3a b2 6b fb e8 88 58 67 f9 48 c7 c7 60 6f b2 88 e8 c5 74 [ 36.930666] RSP: 0018:ffff8880911d7488 EFLAGS: 00010282 [ 36.936341] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000 [ 36.943774] RDX: 0000000000000000 RSI: ffffffff814df3b1 RDI: ffffed101223ae83 [ 36.951133] RBP: ffff88809f6b1740 R08: 0000000000000024 R09: 0000000000000000 [ 36.958425] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88809f6b17d0 [ 36.965867] R13: ffff88809f6b1d98 R14: 00000000ffffffef R15: ffff88809f6b1744 [ 36.973148] ? vprintk_func+0x81/0x180 [ 36.977036] ? __device_add_disk.cold+0x69/0x188 [ 36.981957] ? sprintf+0xc0/0x100 [ 36.985398] ? blk_alloc_devt+0x2d0/0x2d0 [ 36.989543] ? __lockdep_init_map+0x100/0x5a0 [ 36.994050] ? __lockdep_init_map+0x100/0x5a0 [ 36.998558] nbd_dev_add+0x6a9/0x890 [ 37.002260] nbd_genl_connect+0x488/0x1630 [ 37.006495] ? printk+0xba/0xed [ 37.009764] ? nbd_xmit_timeout+0x730/0x730 [ 37.014085] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 37.019020] ? ___ratelimit+0x319/0x590 [ 37.023101] ? nla_parse+0x1e7/0x290 [ 37.027066] ? nla_parse+0x1b2/0x290 [ 37.030779] genl_family_rcv_msg+0x642/0xc40 [ 37.035177] ? genl_rcv+0x40/0x40 [ 37.038647] ? genl_rcv_msg+0x12f/0x160 [ 37.043673] ? __mutex_add_waiter+0x160/0x160 [ 37.048179] ? __radix_tree_lookup+0x216/0x370 [ 37.052779] genl_rcv_msg+0xbf/0x160 [ 37.056485] netlink_rcv_skb+0x160/0x440 [ 37.060546] ? genl_family_rcv_msg+0xc40/0xc40 [ 37.065162] ? netlink_ack+0xae0/0xae0 [ 37.069049] ? genl_rcv+0x15/0x40 [ 37.072500] genl_rcv+0x24/0x40 [ 37.075854] netlink_unicast+0x4d5/0x690 [ 37.079914] ? netlink_sendskb+0x110/0x110 [ 37.084153] ? _copy_from_iter_full+0x229/0x7c0 [ 37.088809] ? __phys_addr_symbol+0x2c/0x70 [ 37.093119] ? __check_object_size+0x17b/0x3e0 [ 37.097783] netlink_sendmsg+0x6bb/0xc40 [ 37.101858] ? aa_af_perm+0x230/0x230 [ 37.105674] ? nlmsg_notify+0x1a0/0x1a0 [ 37.109641] ? kernel_recvmsg+0x220/0x220 [ 37.113789] ? nlmsg_notify+0x1a0/0x1a0 [ 37.117769] sock_sendmsg+0xc3/0x120 [ 37.121514] ___sys_sendmsg+0x7bb/0x8e0 [ 37.125654] ? copy_msghdr_from_user+0x440/0x440 [ 37.130398] ? netlink_dump+0xc10/0xc10 [ 37.134610] ? nlmsg_notify+0x1a0/0x1a0 [ 37.138600] ? security_socket_recvmsg+0x8f/0xc0 [ 37.143359] ? __sys_recvfrom+0x2cd/0x3a0 [ 37.147703] ? __ia32_sys_send+0x100/0x100 [ 37.151928] ? __fdget+0x1a0/0x230 [ 37.155478] __x64_sys_sendmsg+0x132/0x220 [ 37.159795] ? __sys_sendmsg+0x1b0/0x1b0 [ 37.163977] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.169340] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.174344] ? do_syscall_64+0x21/0x620 [ 37.178322] do_syscall_64+0xf9/0x620 [ 37.182110] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.187298] RIP: 0033:0x43fa99 [ 37.190482] 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 [ 37.209671] RSP: 002b:00007ffe09cd2ba8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 37.217372] RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 000000000043fa99 [ 37.224644] RDX: 0000000020008000 RSI: 0000000020000400 RDI: 0000000000000003 [ 37.231916] RBP: 0000000000403500 R08: 0000000000000000 R09: 00000000004004a0 [ 37.239339] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000403590 [ 37.246609] R13: 0000000000000000 R14: 00000000004ad018 R15: 00000000004004a0 [ 37.255102] Kernel Offset: disabled [ 37.258834] Rebooting in 86400 seconds..