[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 33.594927] sysfs: cannot create duplicate filename '/devices/virtual/bdi/43:0'
[ 33.602428] CPU: 0 PID: 8102 Comm: syz-executor242 Not tainted 4.19.211-syzkaller #0
[ 33.610309] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 33.619641] Call Trace:
[ 33.622213] dump_stack+0x1fc/0x2ef
[ 33.625822] sysfs_warn_dup.cold+0x1c/0x29
[ 33.630126] sysfs_create_dir_ns+0x228/0x280
[ 33.634517] ? sysfs_create_mount_point+0xb0/0xb0
[ 33.639340] ? lock_acquire+0x170/0x3c0
[ 33.643299] ? kobject_add_internal+0x134/0x9c0
[ 33.647961] ? ___sys_sendmsg+0x7bb/0x8e0
[ 33.652095] ? class_dir_child_ns_type+0x9/0x60
[ 33.656747] kobject_add_internal+0x2a5/0x9c0
[ 33.661228] kobject_add+0x150/0x1c0
[ 33.664924] ? kset_create_and_add+0x1a0/0x1a0
[ 33.669494] ? device_add+0x2c7/0x16d0
[ 33.673363] device_add+0x37b/0x16d0
[ 33.677070] ? device_check_offline+0x280/0x280
[ 33.681719] ? kfree_const+0x51/0x60
[ 33.685417] ? rcu_read_lock_sched_held+0x16c/0x1d0
[ 33.690413] ? kfree+0x1e2/0x210
[ 33.693937] device_create_groups_vargs+0x1f4/0x270
[ 33.698936] device_create+0xdf/0x120
[ 33.702718] ? device_create_vargs+0x50/0x50
[ 33.707110] ? pointer+0x850/0x850
[ 33.710634] bdi_register_va.part.0+0x4c/0x750
[ 33.715197] bdi_register+0x12a/0x140
[ 33.718981] ? bdi_register_va+0x80/0x80
[ 33.723025] ? vsnprintf+0x2cc/0x14f0
[ 33.726813] bdi_register_owner+0x59/0x100
[ 33.731032] __device_add_disk+0xd58/0x10c0
[ 33.735859] ? sprintf+0xc0/0x100
[ 33.739317] ? blk_alloc_devt+0x2d0/0x2d0
[ 33.743460] ? __lockdep_init_map+0x100/0x5a0
[ 33.747941] ? __lockdep_init_map+0x100/0x5a0
[ 33.752441] nbd_dev_add+0x6a9/0x890
[ 33.756141] nbd_genl_connect+0x488/0x1630
[ 33.760369] ? nbd_xmit_timeout+0x730/0x730
[ 33.764671] ? __sanitizer_cov_trace_switch+0x4b/0x80
[ 33.769842] ? validate_nla+0x270/0x820
[ 33.773806] ? nla_parse+0x1b2/0x290
[ 33.777509] genl_family_rcv_msg+0x642/0xc40
[ 33.781901] ? genl_rcv+0x40/0x40
[ 33.785332] ? genl_rcv_msg+0x12f/0x160
[ 33.789287] ? mutex_trylock+0x1a0/0x1a0
[ 33.793335] ? __radix_tree_lookup+0x216/0x370
[ 33.797902] genl_rcv_msg+0xbf/0x160
[ 33.801623] netlink_rcv_skb+0x160/0x440
[ 33.805689] ? genl_family_rcv_msg+0xc40/0xc40
[ 33.810365] ? netlink_ack+0xae0/0xae0
[ 33.814243] ? genl_rcv+0x15/0x40
[ 33.817684] genl_rcv+0x24/0x40
[ 33.820948] netlink_unicast+0x4d5/0x690
[ 33.824991] ? netlink_sendskb+0x110/0x110
[ 33.829294] ? _copy_from_iter_full+0x229/0x7c0
[ 33.833950] ? __phys_addr_symbol+0x2c/0x70
[ 33.838262] ? __check_object_size+0x17b/0x3e0
[ 33.842830] netlink_sendmsg+0x6c3/0xc50
[ 33.846874] ? aa_af_perm+0x230/0x230
[ 33.850657] ? nlmsg_notify+0x1f0/0x1f0
[ 33.854614] ? kernel_recvmsg+0x220/0x220
[ 33.858747] ? nlmsg_notify+0x1f0/0x1f0
[ 33.862717] sock_sendmsg+0xc3/0x120
[ 33.866437] ___sys_sendmsg+0x7bb/0x8e0
[ 33.870419] ? copy_msghdr_from_user+0x440/0x440
[ 33.875172] ? netlink_dump+0xc10/0xc10
[ 33.879133] ? nlmsg_notify+0x1f0/0x1f0
[ 33.883096] ? security_socket_recvmsg+0x8f/0xc0
[ 33.887833] ? __sys_recvfrom+0x2cd/0x3a0
[ 33.891963] ? __ia32_sys_send+0x100/0x100
[ 33.896184] ? __fdget+0x1a0/0x230
[ 33.899794] __x64_sys_sendmsg+0x132/0x220
[ 33.904006] ? __sys_sendmsg+0x1b0/0x1b0
[ 33.908053] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[ 33.913404] ? trace_hardirqs_off_caller+0x6e/0x210
[ 33.918402] ? do_syscall_64+0x21/0x620
[ 33.922358] do_syscall_64+0xf9/0x620
[ 33.926146] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 33.931347] RIP: 0033:0x7fdfad73cb79
[ 33.935046] 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
[ 33.953933] RSP: 002b:00007ffe6c4118b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 33.961632] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdfad73cb79
[ 33.968914] RDX: 0000000004000010 RSI: 00000000200001c0 RDI: 0000000000000004
[ 33.976168] RBP: 00007fdfad7005e0 R08: 0000000000000000 R09: 0000000000000000
[ 33.983419] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdfad700670
[ 33.990668] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 33.998459] kobject_add_internal failed for 43:0 with -EEXIST, don't try to register things with the same name in the same directory.
[ 34.010809] ------------[ cut here ]------------
[ 34.015951] WARNING: CPU: 0 PID: 8102 at block/genhd.c:719 __device_add_disk.cold+0x69/0x188
[ 34.024529] Kernel panic - not syncing: panic_on_warn set ...
[ 34.024529]
[ 34.031975] CPU: 0 PID: 8102 Comm: syz-executor242 Not tainted 4.19.211-syzkaller #0
[ 34.039835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[ 34.049166] Call Trace:
[ 34.051825] dump_stack+0x1fc/0x2ef
[ 34.055444] panic+0x26a/0x50e
[ 34.058626] ? __warn_printk+0xf3/0xf3
[ 34.062502] ? __device_add_disk.cold+0x69/0x188
[ 34.067240] ? __probe_kernel_read+0x130/0x1b0
[ 34.071807] ? __warn.cold+0x5/0x5a
[ 34.075420] ? __warn+0xe4/0x200
[ 34.078765] ? __device_add_disk.cold+0x69/0x188
[ 34.083499] __warn.cold+0x20/0x5a
[ 34.087019] ? __device_add_disk.cold+0x69/0x188
[ 34.091757] report_bug+0x262/0x2b0
[ 34.095366] do_error_trap+0x1d7/0x310
[ 34.099235] ? math_error+0x310/0x310
[ 34.103023] ? __irq_work_queue_local+0x101/0x160
[ 34.107846] ? irq_work_queue+0x29/0x80
[ 34.111804] ? error_entry+0x72/0xd0
[ 34.115504] ? trace_hardirqs_off_caller+0x6e/0x210
[ 34.120502] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 34.125331] invalid_op+0x14/0x20
[ 34.128788] RIP: 0010:__device_add_disk.cold+0x69/0x188
[ 34.134139] 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
[ 34.153021] RSP: 0018:ffff8880953a7488 EFLAGS: 00010282
[ 34.158362] RAX: 0000000000000024 RBX: 0000000000000001 RCX: 0000000000000000
[ 34.165610] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012a74e83
[ 34.172869] RBP: ffff8880b14b8580 R08: 0000000000000024 R09: 0000000000000000
[ 34.180145] R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b14b8610
[ 34.187400] R13: ffff8880b14b8c10 R14: 00000000ffffffef R15: ffff8880b14b8584
[ 34.194669] ? vprintk_func+0x81/0x180
[ 34.198574] ? __device_add_disk.cold+0x69/0x188
[ 34.203316] ? sprintf+0xc0/0x100
[ 34.206751] ? blk_alloc_devt+0x2d0/0x2d0
[ 34.210883] ? __lockdep_init_map+0x100/0x5a0
[ 34.215364] ? __lockdep_init_map+0x100/0x5a0
[ 34.219843] nbd_dev_add+0x6a9/0x890
[ 34.223550] nbd_genl_connect+0x488/0x1630
[ 34.227767] ? nbd_xmit_timeout+0x730/0x730
[ 34.232074] ? __sanitizer_cov_trace_switch+0x4b/0x80
[ 34.237332] ? validate_nla+0x270/0x820
[ 34.241291] ? nla_parse+0x1b2/0x290
[ 34.244992] genl_family_rcv_msg+0x642/0xc40
[ 34.249391] ? genl_rcv+0x40/0x40
[ 34.252827] ? genl_rcv_msg+0x12f/0x160
[ 34.256781] ? mutex_trylock+0x1a0/0x1a0
[ 34.260828] ? __radix_tree_lookup+0x216/0x370
[ 34.265394] genl_rcv_msg+0xbf/0x160
[ 34.269088] netlink_rcv_skb+0x160/0x440
[ 34.273128] ? genl_family_rcv_msg+0xc40/0xc40
[ 34.277691] ? netlink_ack+0xae0/0xae0
[ 34.281559] ? genl_rcv+0x15/0x40
[ 34.285000] genl_rcv+0x24/0x40
[ 34.288261] netlink_unicast+0x4d5/0x690
[ 34.292311] ? netlink_sendskb+0x110/0x110
[ 34.296541] ? _copy_from_iter_full+0x229/0x7c0
[ 34.301190] ? __phys_addr_symbol+0x2c/0x70
[ 34.305495] ? __check_object_size+0x17b/0x3e0
[ 34.310060] netlink_sendmsg+0x6c3/0xc50
[ 34.314104] ? aa_af_perm+0x230/0x230
[ 34.317884] ? nlmsg_notify+0x1f0/0x1f0
[ 34.321843] ? kernel_recvmsg+0x220/0x220
[ 34.325975] ? nlmsg_notify+0x1f0/0x1f0
[ 34.329933] sock_sendmsg+0xc3/0x120
[ 34.333629] ___sys_sendmsg+0x7bb/0x8e0
[ 34.337584] ? copy_msghdr_from_user+0x440/0x440
[ 34.342319] ? netlink_dump+0xc10/0xc10
[ 34.346276] ? nlmsg_notify+0x1f0/0x1f0
[ 34.350236] ? security_socket_recvmsg+0x8f/0xc0
[ 34.354973] ? __sys_recvfrom+0x2cd/0x3a0
[ 34.359103] ? __ia32_sys_send+0x100/0x100
[ 34.363325] ? __fdget+0x1a0/0x230
[ 34.366846] __x64_sys_sendmsg+0x132/0x220
[ 34.371063] ? __sys_sendmsg+0x1b0/0x1b0
[ 34.375116] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe
[ 34.380460] ? trace_hardirqs_off_caller+0x6e/0x210
[ 34.385457] ? do_syscall_64+0x21/0x620
[ 34.389413] do_syscall_64+0xf9/0x620
[ 34.393197] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 34.398368] RIP: 0033:0x7fdfad73cb79
[ 34.402065] 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
[ 34.421020] RSP: 002b:00007ffe6c4118b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 34.428711] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdfad73cb79
[ 34.435961] RDX: 0000000004000010 RSI: 00000000200001c0 RDI: 0000000000000004
[ 34.443210] RBP: 00007fdfad7005e0 R08: 0000000000000000 R09: 0000000000000000
[ 34.450455] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdfad700670
[ 34.457708] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 34.465304] Kernel Offset: disabled
[ 34.468964] Rebooting in 86400 seconds..