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-mmots-kasan-gce-7,10.128.0.25' (ECDSA) to the list of known hosts. 2017/09/19 23:49:28 parsed 1 programs 2017/09/19 23:49:28 executed programs: 0 2017/09/19 23:49:33 executed programs: 388 2017/09/19 23:49:38 executed programs: 802 2017/09/19 23:49:43 executed programs: 1225 2017/09/19 23:49:48 executed programs: 1641 syzkaller login: [ 176.069031] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor0:8464] [ 176.076777] Modules linked in: [ 176.079947] irq event stamp: 77040 [ 176.083467] hardirqs last enabled at (77039): [] restore_regs_and_iret+0x0/0x1d [ 176.092534] hardirqs last disabled at (77040): [] apic_timer_interrupt+0x98/0xb0 [ 176.101600] softirqs last enabled at (36134): [] __do_softirq+0x74d/0xbd0 [ 176.110146] softirqs last disabled at (36087): [] irq_exit+0x1d3/0x210 [ 176.118344] CPU: 0 PID: 8464 Comm: syz-executor0 Not tainted 4.13.0-mm1+ #7 [ 176.125757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 176.135089] task: ffff8801c75a2340 task.stack: ffff8801c75d0000 [ 176.141119] RIP: 0010:lock_is_held_type+0x18b/0x210 [ 176.146104] RSP: 0018:ffff8801c75d6b20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 [ 176.153784] RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 0000000000000000 [ 176.161029] RDX: 1ffffffff0b592fd RSI: ffff8801d0e4aeb0 RDI: 0000000000000282 [ 176.168270] RBP: ffff8801c75d6b40 R08: 0000000000000000 R09: 0000000000000000 [ 176.175511] R10: ffffffff84bf09a8 R11: ffffffff87060ce0 R12: ffff8801c75a2340 [ 176.182752] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff10038ebada4 [ 176.189997] FS: 00007fa54c59b700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 176.198204] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 176.204056] CR2: 0000000020689000 CR3: 00000001cdc47000 CR4: 00000000001406f0 [ 176.211300] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 176.218541] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 176.225781] Call Trace: [ 176.228343] lockdep_rht_mutex_is_held.part.4+0x1e/0x30 [ 176.233678] lockdep_rht_mutex_is_held+0x59/0x70 [ 176.238406] tipc_sk_lookup+0x9ef/0xdf0 [ 176.242362] ? retint_kernel+0x10/0x10 [ 176.246231] ? tipc_send_packet+0x50/0x50 [ 176.250353] ? retint_kernel+0x10/0x10 [ 176.254228] ? validate_nla+0x1a7/0x5a0 [ 176.258180] ? nla_parse+0x29a/0x3d0 [ 176.261869] ? nla_validate+0x1c0/0x1c0 [ 176.265834] tipc_nl_publ_dump+0x21d/0xef0 [ 176.270057] ? tipc_nl_sk_dump+0x1990/0x1990 [ 176.274445] ? mark_held_locks+0xb2/0x100 [ 176.278564] ? retint_kernel+0x10/0x10 [ 176.282424] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 176.287416] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 176.292150] ? retint_kernel+0x10/0x10 [ 176.296035] ? tipc_nl_publ_dump+0x202/0xef0 [ 176.300421] __tipc_nl_compat_dumpit.isra.10+0x20c/0xa10 [ 176.305852] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 176.311102] ? skb_put+0x149/0x1c0 [ 176.314616] ? tipc_tlv_sprintf+0x230/0x2d0 [ 176.318905] ? skb_put+0x149/0x1c0 [ 176.322430] ? nla_put+0xf9/0x130 [ 176.325866] tipc_nl_compat_sk_dump+0x834/0xbb0 [ 176.330504] ? check_noncircular+0x20/0x20 [ 176.334716] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 176.340307] ? __alloc_skb+0x548/0x740 [ 176.344172] ? skb_copy_and_csum_dev+0x360/0x360 [ 176.348898] ? validate_nla+0x1a7/0x5a0 [ 176.352843] ? tipc_nl_sk_dump+0x1990/0x1990 [ 176.357220] ? tipc_tlv_sprintf+0x2d0/0x2d0 [ 176.361530] ? nla_validate+0x1c0/0x1c0 [ 176.365489] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 176.371087] __tipc_nl_compat_dumpit.isra.10+0x30d/0xa10 [ 176.376519] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 176.381772] ? __might_sleep+0x95/0x190 [ 176.385732] ? genl_rcv_msg+0x115/0x140 [ 176.389679] ? skb_put+0x149/0x1c0 [ 176.393194] tipc_nl_compat_dumpit+0x1d2/0x410 [ 176.397750] tipc_nl_compat_recv+0x419/0x18f0 [ 176.402219] ? tipc_nl_compat_doit+0x660/0x660 [ 176.406780] ? tipc_socket_stop+0x30/0x30 [ 176.410897] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 176.416500] ? find_held_lock+0x39/0x1d0 [ 176.420540] genl_family_rcv_msg+0x7b7/0xfc0 [ 176.424927] ? genl_rcv+0x40/0x40 [ 176.428352] ? netlink_getname+0x3c0/0x3c0 [ 176.432564] ? lock_release+0xd70/0xd70 [ 176.436507] ? netlink_lookup+0x620/0xa90 [ 176.440649] genl_rcv_msg+0xb2/0x140 [ 176.444337] netlink_rcv_skb+0x216/0x440 [ 176.448368] ? genl_family_rcv_msg+0xfc0/0xfc0 [ 176.452922] ? netlink_ack+0xab0/0xab0 [ 176.456778] ? genl_rcv+0x19/0x40 [ 176.460207] ? netlink_skb_destructor+0x1d0/0x1d0 [ 176.465035] ? selinux_nlmsg_lookup+0x32b/0x430 [ 176.469681] genl_rcv+0x28/0x40 [ 176.472933] netlink_unicast+0x4e8/0x6f0 [ 176.476976] ? netlink_attachskb+0x8a0/0x8a0 [ 176.481366] ? security_netlink_send+0x81/0xb0 [ 176.485925] netlink_sendmsg+0xa4a/0xe70 [ 176.489971] ? netlink_unicast+0x6f0/0x6f0 [ 176.494183] ? security_socket_sendmsg+0x89/0xb0 [ 176.498910] ? netlink_unicast+0x6f0/0x6f0 [ 176.503126] sock_sendmsg+0xca/0x110 [ 176.506814] sock_write_iter+0x320/0x5e0 [ 176.510844] ? release_sock+0x1d4/0x2a0 [ 176.514794] ? sock_sendmsg+0x110/0x110 [ 176.518753] ? iov_iter_init+0xaf/0x1d0 [ 176.522705] __vfs_write+0x68a/0x970 [ 176.526403] ? kernel_read+0x120/0x120 [ 176.530260] ? selinux_capset+0x100/0x100 [ 176.534391] ? selinux_file_permission+0x82/0x460 [ 176.539215] ? rw_verify_area+0xe5/0x2b0 [ 176.543246] ? __fdget_raw+0x20/0x20 [ 176.546935] vfs_write+0x18f/0x510 [ 176.550462] SyS_write+0xef/0x220 [ 176.553889] ? SyS_read+0x220/0x220 [ 176.557487] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 176.562477] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 176.567221] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 176.571946] RIP: 0033:0x4520a9 [ 176.575112] RSP: 002b:00007fa54c59ac08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 [ 176.582795] RAX: ffffffffffffffda RBX: 00000000007180b0 RCX: 00000000004520a9 [ 176.590039] RDX: 0000000000000020 RSI: 0000000020689000 RDI: 000000000000000d [ 176.597280] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 [ 176.604524] R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000000 [ 176.611769] R13: 0000000000a6f7ef R14: 00007fa54c59b9c0 R15: 0000000000000002 [ 176.619039] Code: fc ff df 41 c7 84 24 94 08 00 00 00 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 63 48 83 3d 04 ca 58 04 00 74 30 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e8 5b 41 5c 41 5d 5d c3 48 83 [ 176.638344] Kernel panic - not syncing: softlockup: hung tasks [ 176.644287] CPU: 0 PID: 8464 Comm: syz-executor0 Tainted: G L 4.13.0-mm1+ #7 [ 176.652568] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 176.661890] Call Trace: [ 176.664441] [ 176.666564] dump_stack+0x194/0x257 [ 176.670165] ? arch_local_irq_restore+0x53/0x53 [ 176.674801] ? vprintk_default+0x28/0x30 [ 176.678837] ? vprintk_func+0x5e/0xc0 [ 176.682617] panic+0x1e4/0x417 [ 176.685779] ? __warn+0x1d9/0x1d9 [ 176.689219] watchdog_timer_fn+0x401/0x410 [ 176.693427] ? watchdog_park_threads+0x240/0x240 [ 176.698176] __hrtimer_run_queues+0x349/0xe10 [ 176.702646] ? watchdog_park_threads+0x240/0x240 [ 176.707374] ? hrtimer_cancel+0x40/0x40 [ 176.711327] ? pvclock_read_flags+0x160/0x160 [ 176.715805] ? kvm_clock_get_cycles+0x25/0x30 [ 176.720274] ? ktime_get_update_offsets_now+0x34a/0x520 [ 176.725614] ? do_timer+0x50/0x50 [ 176.729046] ? native_apic_msr_write+0x5c/0x80 [ 176.733603] ? lapic_next_event+0x5a/0x90 [ 176.737725] ? clockevents_program_event+0x108/0x2e0 [ 176.742807] hrtimer_interrupt+0x1d4/0x5f0 [ 176.747044] smp_apic_timer_interrupt+0x156/0x710 [ 176.751860] ? smp_call_function_single_interrupt+0x650/0x650 [ 176.757721] ? _raw_spin_lock+0x32/0x40 [ 176.761673] ? handle_edge_irq+0x2b4/0x7c0 [ 176.765891] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 176.770706] ? tipc_sk_lookup+0x278/0xdf0 [ 176.774829] apic_timer_interrupt+0x9d/0xb0 [ 176.779121] [ 176.781332] RIP: 0010:lock_is_held_type+0x18b/0x210 [ 176.786315] RSP: 0018:ffff8801c75d6b20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 [ 176.793998] RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 0000000000000000 [ 176.801245] RDX: 1ffffffff0b592fd RSI: ffff8801d0e4aeb0 RDI: 0000000000000282 [ 176.808493] RBP: ffff8801c75d6b40 R08: 0000000000000000 R09: 0000000000000000 [ 176.815733] R10: ffffffff84bf09a8 R11: ffffffff87060ce0 R12: ffff8801c75a2340 [ 176.822974] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff10038ebada4 [ 176.830224] ? tipc_sk_lookup+0x278/0xdf0 [ 176.834357] lockdep_rht_mutex_is_held.part.4+0x1e/0x30 [ 176.839692] lockdep_rht_mutex_is_held+0x59/0x70 [ 176.844421] tipc_sk_lookup+0x9ef/0xdf0 [ 176.848370] ? retint_kernel+0x10/0x10 [ 176.852237] ? tipc_send_packet+0x50/0x50 [ 176.856355] ? retint_kernel+0x10/0x10 [ 176.860227] ? validate_nla+0x1a7/0x5a0 [ 176.864176] ? nla_parse+0x29a/0x3d0 [ 176.867866] ? nla_validate+0x1c0/0x1c0 [ 176.871821] tipc_nl_publ_dump+0x21d/0xef0 [ 176.876046] ? tipc_nl_sk_dump+0x1990/0x1990 [ 176.880432] ? mark_held_locks+0xb2/0x100 [ 176.884553] ? retint_kernel+0x10/0x10 [ 176.888414] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 176.893402] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 176.898137] ? retint_kernel+0x10/0x10 [ 176.902012] ? tipc_nl_publ_dump+0x202/0xef0 [ 176.906405] __tipc_nl_compat_dumpit.isra.10+0x20c/0xa10 [ 176.911835] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 176.917084] ? skb_put+0x149/0x1c0 [ 176.920599] ? tipc_tlv_sprintf+0x230/0x2d0 [ 176.924888] ? skb_put+0x149/0x1c0 [ 176.928414] ? nla_put+0xf9/0x130 [ 176.931841] tipc_nl_compat_sk_dump+0x834/0xbb0 [ 176.936480] ? check_noncircular+0x20/0x20 [ 176.940689] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 176.946282] ? __alloc_skb+0x548/0x740 [ 176.950144] ? skb_copy_and_csum_dev+0x360/0x360 [ 176.954869] ? validate_nla+0x1a7/0x5a0 [ 176.958813] ? tipc_nl_sk_dump+0x1990/0x1990 [ 176.963189] ? tipc_tlv_sprintf+0x2d0/0x2d0 [ 176.967489] ? nla_validate+0x1c0/0x1c0 [ 176.971445] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 176.977043] __tipc_nl_compat_dumpit.isra.10+0x30d/0xa10 [ 176.982474] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 176.987726] ? __might_sleep+0x95/0x190 [ 176.991692] ? genl_rcv_msg+0x115/0x140 [ 176.995639] ? skb_put+0x149/0x1c0 [ 176.999153] tipc_nl_compat_dumpit+0x1d2/0x410 [ 177.003711] tipc_nl_compat_recv+0x419/0x18f0 [ 177.008180] ? tipc_nl_compat_doit+0x660/0x660 [ 177.012737] ? tipc_socket_stop+0x30/0x30 [ 177.016855] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 177.022455] ? find_held_lock+0x39/0x1d0 [ 177.026494] genl_family_rcv_msg+0x7b7/0xfc0 [ 177.030879] ? genl_rcv+0x40/0x40 [ 177.034302] ? netlink_getname+0x3c0/0x3c0 [ 177.038515] ? lock_release+0xd70/0xd70 [ 177.042459] ? netlink_lookup+0x620/0xa90 [ 177.046597] genl_rcv_msg+0xb2/0x140 [ 177.050286] netlink_rcv_skb+0x216/0x440 [ 177.054319] ? genl_family_rcv_msg+0xfc0/0xfc0 [ 177.058873] ? netlink_ack+0xab0/0xab0 [ 177.062727] ? genl_rcv+0x19/0x40 [ 177.066156] ? netlink_skb_destructor+0x1d0/0x1d0