INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added 'ci-upstream-kasan-gce-7,10.128.0.38' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 50.920024] hrtimer: interrupt took 18280 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 76.071016] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syzkaller040604:3007] [ 76.078904] Modules linked in: [ 76.082064] irq event stamp: 5000742 [ 76.085748] hardirqs last enabled at (5000741): [] restore_regs_and_iret+0x0/0x1d [ 76.094984] hardirqs last disabled at (5000742): [] apic_timer_interrupt+0x8e/0xa0 [ 76.104220] softirqs last enabled at (5000550): [] __do_softirq+0x7ba/0xba3 [ 76.112940] softirqs last disabled at (5000539): [] irq_exit+0x1cc/0x200 [ 76.121312] CPU: 1 PID: 3007 Comm: syzkaller040604 Not tainted 4.13.0-rc5+ #41 [ 76.128900] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.138222] task: ffff8801d14e0040 task.stack: ffff8801cf340000 [ 76.144250] RIP: 0010:genl_family_attrbuf+0x69/0xf0 [ 76.149229] RSP: 0018:ffff8801cf346d90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 76.156901] RAX: 0000000000000000 RBX: ffffffff8580abc0 RCX: 0000000000000000 [ 76.164140] RDX: 0000000000000004 RSI: ffff8801cf346f78 RDI: ffffffff85cbd600 [ 76.171379] RBP: ffff8801cf346d98 R08: 0000000000000001 R09: 1ffff10039e68d52 [ 76.178615] R10: ffffffff84c10898 R11: 0000000000000002 R12: ffff8801cf346f78 [ 76.185854] R13: 000000000000000a R14: 0000000000000000 R15: ffffffff86067500 [ 76.193091] FS: 0000000001bcf880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 76.201287] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.207135] CR2: 0000000020fdb000 CR3: 00000001d0da1000 CR4: 00000000001406e0 [ 76.214378] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.221614] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.228848] Call Trace: [ 76.231406] tipc_nlmsg_parse+0x29/0xe0 [ 76.235350] tipc_nl_publ_dump+0x7f4/0xef0 [ 76.239563] ? tipc_nl_sk_dump+0x1990/0x1990 [ 76.243945] ? mark_held_locks+0xaf/0x100 [ 76.248061] ? retint_kernel+0x10/0x10 [ 76.251916] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 76.256899] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.261630] ? retint_kernel+0x10/0x10 [ 76.265503] __tipc_nl_compat_dumpit.isra.10+0x20c/0xa10 [ 76.270929] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 76.276177] ? skb_put+0x149/0x1c0 [ 76.279698] ? nla_put+0xf9/0x130 [ 76.283122] tipc_nl_compat_sk_dump+0x834/0xbb0 [ 76.287757] ? check_noncircular+0x20/0x20 [ 76.291961] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 76.297553] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.302281] ? validate_nla+0x157/0x4a0 [ 76.306219] ? tipc_nl_sk_dump+0x1990/0x1990 [ 76.310591] ? tipc_tlv_sprintf+0x2d0/0x2d0 [ 76.314887] ? nla_validate+0x1c0/0x1c0 [ 76.318840] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 76.324433] __tipc_nl_compat_dumpit.isra.10+0x30d/0xa10 [ 76.329861] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 76.335116] ? __might_sleep+0x95/0x190 [ 76.339069] ? genl_rcv_msg+0x115/0x140 [ 76.343014] ? skb_put+0x149/0x1c0 [ 76.346527] tipc_nl_compat_dumpit+0x1d2/0x3c0 [ 76.351081] tipc_nl_compat_recv+0x419/0x18f0 [ 76.355542] ? retint_kernel+0x10/0x10 [ 76.359400] ? tipc_nl_compat_doit+0x660/0x660 [ 76.363953] ? tipc_socket_stop+0x30/0x30 [ 76.368068] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 76.373657] ? retint_kernel+0x10/0x10 [ 76.377526] genl_family_rcv_msg+0x7b7/0xfb0 [ 76.381906] ? genl_rcv+0x40/0x40 [ 76.385327] ? netlink_deliver_tap+0x14d/0xa60 [ 76.389875] ? lock_downgrade+0x990/0x990 [ 76.394003] ? lock_release+0xa40/0xa40 [ 76.397953] ? lock_acquire+0x1d5/0x580 [ 76.401908] genl_rcv_msg+0xb2/0x140 [ 76.405596] netlink_rcv_skb+0x216/0x440 [ 76.409624] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 76.414183] ? netlink_ack+0xab0/0xab0 [ 76.418056] ? genl_rcv+0x19/0x40 [ 76.421488] ? netlink_skb_destructor+0x1d0/0x1d0 [ 76.426306] ? selinux_nlmsg_lookup+0x32b/0x430 [ 76.430946] genl_rcv+0x28/0x40 [ 76.434194] netlink_unicast+0x4e8/0x6f0 [ 76.438229] ? netlink_attachskb+0x8a0/0x8a0 [ 76.442609] ? security_netlink_send+0x81/0xb0 [ 76.447160] netlink_sendmsg+0xa4a/0xe60 [ 76.451195] ? netlink_unicast+0x6f0/0x6f0 [ 76.455402] ? security_socket_sendmsg+0x89/0xb0 [ 76.460127] ? netlink_unicast+0x6f0/0x6f0 [ 76.464329] sock_sendmsg+0xca/0x110 [ 76.468015] sock_write_iter+0x31a/0x5d0 [ 76.472048] ? sock_sendmsg+0x110/0x110 [ 76.475998] ? iov_iter_init+0xaf/0x1d0 [ 76.479948] __vfs_write+0x684/0x970 [ 76.483631] ? default_llseek+0x290/0x290 [ 76.487744] ? selinux_capset+0x100/0x100 [ 76.491867] ? selinux_file_permission+0x82/0x460 [ 76.496686] ? rw_verify_area+0xe5/0x2b0 [ 76.500717] ? __fdget_raw+0x20/0x20 [ 76.504401] vfs_write+0x189/0x510 [ 76.507911] SyS_write+0xef/0x220 [ 76.511333] ? SyS_read+0x220/0x220 [ 76.514925] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 76.519908] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.524637] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 76.529357] RIP: 0033:0x4403c9 [ 76.532513] RSP: 002b:00007ffd914e31b8 EFLAGS: 00000207 ORIG_RAX: 0000000000000001 [ 76.540189] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004403c9 [ 76.547429] RDX: 0000000000000022 RSI: 0000000020fdb000 RDI: 0000000000000006 [ 76.554681] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 76.561919] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401930 [ 76.569155] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 76.576405] Code: 86 00 00 00 e8 79 da 76 fd 48 c7 c7 00 d6 cb 85 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 <83> c0 03 38 d0 7c 04 84 d2 75 67 8b 05 76 b5 d4 01 85 c0 75 27 [ 76.595526] Kernel panic - not syncing: softlockup: hung tasks [ 76.601465] CPU: 1 PID: 3007 Comm: syzkaller040604 Tainted: G L 4.13.0-rc5+ #41 [ 76.610008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.619332] Call Trace: [ 76.621880] [ 76.624002] dump_stack+0x194/0x257 [ 76.627606] ? arch_local_irq_restore+0x53/0x53 [ 76.632247] ? vprintk_default+0x28/0x30 [ 76.636284] ? vprintk_func+0x5e/0xc0 [ 76.640060] panic+0x1e4/0x417 [ 76.643221] ? __warn+0x1d9/0x1d9 [ 76.646658] watchdog_timer_fn+0x401/0x410 [ 76.650869] ? watchdog_park_threads+0x240/0x240 [ 76.655605] __hrtimer_run_queues+0x349/0xe10 [ 76.660076] ? watchdog_park_threads+0x240/0x240 [ 76.664802] ? hrtimer_cancel+0x40/0x40 [ 76.668754] ? pvclock_read_flags+0x160/0x160 [ 76.673221] ? lock_acquire+0x1d5/0x580 [ 76.677166] ? kvm_clock_get_cycles+0x25/0x30 [ 76.681627] ? ktime_get_update_offsets_now+0x34a/0x520 [ 76.686962] ? do_timer+0x50/0x50 [ 76.690388] ? __softirqentry_text_start+0x8/0x8 [ 76.695111] ? handle_irq_event_percpu+0x141/0x1b0 [ 76.700006] ? native_apic_msr_write+0x5c/0x80 [ 76.704558] ? lapic_next_event+0x5a/0x90 [ 76.708673] ? clockevents_program_event+0x108/0x2e0 [ 76.713752] hrtimer_interrupt+0x1c2/0x5e0 [ 76.717976] local_apic_timer_interrupt+0x6b/0xa0 [ 76.722877] smp_apic_timer_interrupt+0x71/0xa0 [ 76.727515] apic_timer_interrupt+0x93/0xa0 [ 76.731804] RIP: 0010:genl_family_attrbuf+0x69/0xf0 [ 76.736782] RSP: 0018:ffff8801cf346d90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 76.744455] RAX: 0000000000000000 RBX: ffffffff8580abc0 RCX: 0000000000000000 [ 76.751696] RDX: 0000000000000004 RSI: ffff8801cf346f78 RDI: ffffffff85cbd600 [ 76.758932] RBP: ffff8801cf346d98 R08: 0000000000000001 R09: 1ffff10039e68d52 [ 76.766184] R10: ffffffff84c10898 R11: 0000000000000002 R12: ffff8801cf346f78 [ 76.773429] R13: 000000000000000a R14: 0000000000000000 R15: ffffffff86067500 [ 76.780665] [ 76.782877] ? tipc_sk_lookup+0x278/0xdf0 [ 76.787007] tipc_nlmsg_parse+0x29/0xe0 [ 76.790967] tipc_nl_publ_dump+0x7f4/0xef0 [ 76.795182] ? tipc_nl_sk_dump+0x1990/0x1990 [ 76.799565] ? mark_held_locks+0xaf/0x100 [ 76.803679] ? retint_kernel+0x10/0x10 [ 76.807537] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 76.812530] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.817274] ? retint_kernel+0x10/0x10 [ 76.821147] __tipc_nl_compat_dumpit.isra.10+0x20c/0xa10 [ 76.826577] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 76.831830] ? skb_put+0x149/0x1c0 [ 76.835351] ? nla_put+0xf9/0x130 [ 76.838775] tipc_nl_compat_sk_dump+0x834/0xbb0 [ 76.843415] ? check_noncircular+0x20/0x20 [ 76.847626] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 76.853217] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 76.857941] ? validate_nla+0x157/0x4a0 [ 76.861881] ? tipc_nl_sk_dump+0x1990/0x1990 [ 76.866262] ? tipc_tlv_sprintf+0x2d0/0x2d0 [ 76.870557] ? nla_validate+0x1c0/0x1c0 [ 76.874514] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 76.880108] __tipc_nl_compat_dumpit.isra.10+0x30d/0xa10 [ 76.885536] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 76.890783] ? __might_sleep+0x95/0x190 [ 76.894736] ? genl_rcv_msg+0x115/0x140 [ 76.898692] ? skb_put+0x149/0x1c0 [ 76.902218] tipc_nl_compat_dumpit+0x1d2/0x3c0 [ 76.906773] tipc_nl_compat_recv+0x419/0x18f0 [ 76.911234] ? retint_kernel+0x10/0x10 [ 76.915093] ? tipc_nl_compat_doit+0x660/0x660 [ 76.919647] ? tipc_socket_stop+0x30/0x30 [ 76.923759] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 76.929348] ? retint_kernel+0x10/0x10 [ 76.933221] genl_family_rcv_msg+0x7b7/0xfb0 [ 76.937602] ? genl_rcv+0x40/0x40 [ 76.941029] ? netlink_deliver_tap+0x14d/0xa60 [ 76.945579] ? lock_downgrade+0x990/0x990 [ 76.949697] ? lock_release+0xa40/0xa40 [ 76.953649] ? lock_acquire+0x1d5/0x580 [ 76.957603] genl_rcv_msg+0xb2/0x140 [ 76.961702] netlink_rcv_skb+0x216/0x440 [ 76.965732] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 76.970281] ? netlink_ack+0xab0/0xab0 [ 76.974133] ? genl_rcv+0x19/0x40 [ 76.977558] ? netlink_skb_destructor+0x1d0/0x1d0 [ 76.982369] ? selinux_nlmsg_lookup+0x32b/0x430 [ 76.987011] genl_rcv+0x28/0x40 [ 76.990264] netlink_unicast+0x4e8/0x6f0 [ 76.994297] ? netlink_attachskb+0x8a0/0x8a0 [ 76.998682] ? security_netlink_send+0x81/0xb0 [ 77.003233] netlink_sendmsg+0xa4a/0xe60 [ 77.007267] ? netlink_unicast+0x6f0/0x6f0 [ 77.011474] ? security_socket_sendmsg+0x89/0xb0 [ 77.016204] ? netlink_unicast+0x6f0/0x6f0 [ 77.020418] sock_sendmsg+0xca/0x110 [ 77.024104] sock_write_iter+0x31a/0x5d0 [ 77.028140] ? sock_sendmsg+0x110/0x110 [ 77.032090] ? iov_iter_init+0xaf/0x1d0 [ 77.036039] __vfs_write+0x684/0x970 [ 77.039722] ? default_llseek+0x290/0x290 [ 77.043834] ? selinux_capset+0x100/0x100 [ 77.047969] ? selinux_file_permission+0x82/0x460 [ 77.052790] ? rw_verify_area+0xe5/0x2b0 [ 77.056818] ? __fdget_raw+0x20/0x20 [ 77.060505] vfs_write+0x189/0x510 [ 77.064024] SyS_write+0xef/0x220 [ 77.067449] ? SyS_read+0x220/0x220