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-net-kasan-gce-7,10.128.15.196' (ECDSA) to the list of known hosts. 2017/09/06 01:21:15 parsed 1 programs 2017/09/06 01:21:15 executed programs: 0 2017/09/06 01:21:20 executed programs: 352 2017/09/06 01:21:25 executed programs: 704 2017/09/06 01:21:30 executed programs: 1061 2017/09/06 01:21:35 executed programs: 1450 2017/09/06 01:21:40 executed programs: 1818 syzkaller login: [ 180.072029] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor0:10393] [ 180.073215] Modules linked in: [ 180.073678] irq event stamp: 258504 [ 180.074180] hardirqs last enabled at (258503): [] restore_regs_and_iret+0x0/0x1d [ 180.075406] hardirqs last disabled at (258504): [] apic_timer_interrupt+0x8e/0xa0 [ 180.076632] softirqs last enabled at (258502): [] __do_softirq+0x7ba/0xba3 [ 180.077795] softirqs last disabled at (258495): [] irq_exit+0x1cc/0x200 [ 180.078885] CPU: 1 PID: 10393 Comm: syz-executor0 Not tainted 4.13.0-rc7+ #40 [ 180.079873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 180.081195] task: ffff8801ca640180 task.stack: ffff8801cb7f0000 [ 180.082014] RIP: 0010:lock_acquire+0x256/0x580 [ 180.082693] RSP: 0018:ffff8801cb7f6a78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 180.083718] RAX: dffffc0000000000 RBX: ffff8801ca640180 RCX: 0000000000000000 [ 180.084670] RDX: 1ffffffff0b59371 RSI: 00000000ab214c58 RDI: 0000000000000286 [ 180.085786] RBP: ffff8801cb7f6b70 R08: 0000000000000003 R09: 0000000000000002 [ 180.086763] R10: ffff8801cb7f6a58 R11: ffffffff84bced28 R12: 1ffff100396fed55 [ 180.087714] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 [ 180.088669] FS: 00007f9320ced700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 180.089746] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 180.090533] CR2: 0000000020689000 CR3: 00000001c851d000 CR4: 00000000001406e0 [ 180.091536] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 180.094705] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 180.101943] Call Trace: [ 180.104503] ? lock_downgrade+0x990/0x990 [ 180.108625] ? lock_release+0xa40/0xa40 [ 180.112584] ? __lock_is_held+0xb6/0x140 [ 180.116618] ? rcutorture_record_progress+0x10/0x10 [ 180.121613] tipc_sk_lookup+0x2bd/0xdf0 [ 180.125986] ? tipc_sk_lookup+0x278/0xdf0 [ 180.130113] ? mark_held_locks+0xaf/0x100 [ 180.134241] ? tipc_send_packet+0x50/0x50 [ 180.138358] ? mark_held_locks+0xaf/0x100 [ 180.142485] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 180.147470] ? validate_nla+0x1a7/0x5a0 [ 180.151416] ? validate_nla+0x1a7/0x5a0 [ 180.155362] ? nla_parse+0x29a/0x3d0 [ 180.159049] ? nla_validate+0x1c0/0x1c0 [ 180.162999] tipc_nl_publ_dump+0x21d/0xef0 [ 180.167217] ? tipc_nl_sk_dump+0x1990/0x1990 [ 180.171595] ? mark_held_locks+0xaf/0x100 [ 180.175712] ? mark_held_locks+0xaf/0x100 [ 180.179831] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 180.184814] ? retint_kernel+0x10/0x10 [ 180.188670] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 180.193654] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 180.198381] ? retint_kernel+0x10/0x10 [ 180.202244] ? tipc_sk_lookup+0x278/0xdf0 [ 180.206382] __tipc_nl_compat_dumpit.isra.10+0x20c/0xa10 [ 180.211810] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 180.217055] ? skb_put+0x149/0x1c0 [ 180.220566] ? tipc_tlv_sprintf+0x230/0x2d0 [ 180.224852] ? skb_put+0x149/0x1c0 [ 180.228372] ? nla_put+0xf9/0x130 [ 180.231795] tipc_nl_compat_sk_dump+0x834/0xbb0 [ 180.236430] ? check_noncircular+0x20/0x20 [ 180.240636] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 180.246231] ? __alloc_skb+0x548/0x740 [ 180.250095] ? skb_copy_and_csum_dev+0x360/0x360 [ 180.254816] ? validate_nla+0x1a7/0x5a0 [ 180.258754] ? tipc_nl_sk_dump+0x1990/0x1990 [ 180.263128] ? tipc_tlv_sprintf+0x2d0/0x2d0 [ 180.267424] ? nla_validate+0x1c0/0x1c0 [ 180.271377] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 180.276971] __tipc_nl_compat_dumpit.isra.10+0x30d/0xa10 [ 180.282405] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 180.287652] ? __might_sleep+0x95/0x190 [ 180.291604] ? genl_rcv_msg+0x115/0x140 [ 180.295549] ? skb_put+0x149/0x1c0 [ 180.299059] tipc_nl_compat_dumpit+0x1d2/0x410 [ 180.303612] tipc_nl_compat_recv+0x419/0x18f0 [ 180.308085] ? tipc_nl_compat_doit+0x660/0x660 [ 180.312637] ? check_noncircular+0x20/0x20 [ 180.316845] ? tipc_socket_stop+0x30/0x30 [ 180.320961] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 180.326574] genl_family_rcv_msg+0x7b7/0xfb0 [ 180.330964] ? genl_rcv+0x40/0x40 [ 180.334387] ? netlink_deliver_tap+0x14d/0xa60 [ 180.338936] ? lock_downgrade+0x990/0x990 [ 180.343056] ? lock_release+0xa40/0xa40 [ 180.347002] ? lock_acquire+0x1d5/0x580 [ 180.350963] genl_rcv_msg+0xb2/0x140 [ 180.354647] netlink_rcv_skb+0x216/0x440 [ 180.358683] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 180.363235] ? netlink_ack+0xab0/0xab0 [ 180.367087] ? genl_rcv+0x19/0x40 [ 180.370520] ? netlink_skb_destructor+0x1d0/0x1d0 [ 180.375332] ? selinux_nlmsg_lookup+0x32b/0x430 [ 180.379970] genl_rcv+0x28/0x40 [ 180.383218] netlink_unicast+0x4e8/0x6f0 [ 180.387252] ? netlink_attachskb+0x8a0/0x8a0 [ 180.391632] ? security_netlink_send+0x81/0xb0 [ 180.396194] netlink_sendmsg+0xa4a/0xe60 [ 180.400228] ? netlink_unicast+0x6f0/0x6f0 [ 180.404439] ? security_socket_sendmsg+0x89/0xb0 [ 180.409165] ? netlink_unicast+0x6f0/0x6f0 [ 180.413375] sock_sendmsg+0xca/0x110 [ 180.417072] sock_write_iter+0x31a/0x5d0 [ 180.421103] ? sock_sendmsg+0x110/0x110 [ 180.425062] ? iov_iter_init+0xaf/0x1d0 [ 180.429010] __vfs_write+0x684/0x970 [ 180.432701] ? default_llseek+0x290/0x290 [ 180.436818] ? selinux_capset+0x100/0x100 [ 180.440945] ? selinux_file_permission+0x82/0x460 [ 180.445763] ? rw_verify_area+0xe5/0x2b0 [ 180.449789] ? __fdget_raw+0x20/0x20 [ 180.453473] vfs_write+0x189/0x510 [ 180.456991] SyS_write+0xef/0x220 [ 180.460411] ? SyS_socket+0x137/0x200 [ 180.464196] ? SyS_read+0x220/0x220 [ 180.467788] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 180.472773] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 180.477508] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 180.482229] RIP: 0033:0x451e59 [ 180.485386] RSP: 002b:00007f9320cecc08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 [ 180.493061] RAX: ffffffffffffffda RBX: 0000000000718160 RCX: 0000000000451e59 [ 180.500304] RDX: 0000000000000020 RSI: 0000000020689000 RDI: 0000000000000008 [ 180.507541] RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 [ 180.514776] R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000000 [ 180.522028] R13: 0000000000a6f7ef R14: 00007f9320ced9c0 R15: 0000000000000008 [ 180.529282] Code: 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 95 02 00 00 48 83 3d a1 e0 56 04 00 0f 84 d1 01 00 00 48 8b bd 20 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 [ 180.548418] Kernel panic - not syncing: softlockup: hung tasks [ 180.554362] CPU: 1 PID: 10393 Comm: syz-executor0 Tainted: G L 4.13.0-rc7+ #40 [ 180.562815] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 180.572134] Call Trace: [ 180.574684] [ 180.576811] dump_stack+0x194/0x257 [ 180.580407] ? arch_local_irq_restore+0x53/0x53 [ 180.585042] ? vprintk_default+0x28/0x30 [ 180.589085] ? vprintk_func+0x5e/0xc0 [ 180.592863] panic+0x1e4/0x417 [ 180.596036] ? __warn+0x1d9/0x1d9 [ 180.599474] watchdog_timer_fn+0x401/0x410 [ 180.603686] ? watchdog_park_threads+0x240/0x240 [ 180.608418] __hrtimer_run_queues+0x349/0xe10 [ 180.612893] ? watchdog_park_threads+0x240/0x240 [ 180.617625] ? hrtimer_cancel+0x40/0x40 [ 180.621572] ? pvclock_read_flags+0x160/0x160 [ 180.626040] ? lock_acquire+0x1d5/0x580 [ 180.629985] ? kvm_clock_get_cycles+0x25/0x30 [ 180.634446] ? ktime_get_update_offsets_now+0x34a/0x520 [ 180.639779] ? do_timer+0x50/0x50 [ 180.643198] ? __softirqentry_text_start+0x8/0x8 [ 180.647924] ? lock_downgrade+0x990/0x990 [ 180.652041] ? native_apic_msr_write+0x5c/0x80 [ 180.656596] ? lapic_next_event+0x5a/0x90 [ 180.660719] ? clockevents_program_event+0x108/0x2e0 [ 180.665806] hrtimer_interrupt+0x1c2/0x5e0 [ 180.670040] local_apic_timer_interrupt+0x6b/0xa0 [ 180.674856] smp_apic_timer_interrupt+0x71/0xa0 [ 180.679496] apic_timer_interrupt+0x93/0xa0 [ 180.683787] RIP: 0010:lock_acquire+0x256/0x580 [ 180.688343] RSP: 0018:ffff8801cb7f6a78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 180.696024] RAX: dffffc0000000000 RBX: ffff8801ca640180 RCX: 0000000000000000 [ 180.703347] RDX: 1ffffffff0b59371 RSI: 00000000ab214c58 RDI: 0000000000000286 [ 180.710593] RBP: ffff8801cb7f6b70 R08: 0000000000000003 R09: 0000000000000002 [ 180.717838] R10: ffff8801cb7f6a58 R11: ffffffff84bced28 R12: 1ffff100396fed55 [ 180.725089] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 [ 180.732332] [ 180.734551] ? tipc_sk_lookup+0x278/0xdf0 [ 180.738677] ? lock_downgrade+0x990/0x990 [ 180.742794] ? lock_release+0xa40/0xa40 [ 180.746739] ? __lock_is_held+0xb6/0x140 [ 180.750769] ? rcutorture_record_progress+0x10/0x10 [ 180.755758] tipc_sk_lookup+0x2bd/0xdf0 [ 180.759697] ? tipc_sk_lookup+0x278/0xdf0 [ 180.763812] ? mark_held_locks+0xaf/0x100 [ 180.767935] ? tipc_send_packet+0x50/0x50 [ 180.772052] ? mark_held_locks+0xaf/0x100 [ 180.776170] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 180.781161] ? validate_nla+0x1a7/0x5a0 [ 180.785105] ? validate_nla+0x1a7/0x5a0 [ 180.789052] ? nla_parse+0x29a/0x3d0 [ 180.792735] ? nla_validate+0x1c0/0x1c0 [ 180.796693] tipc_nl_publ_dump+0x21d/0xef0 [ 180.800917] ? tipc_nl_sk_dump+0x1990/0x1990 [ 180.805298] ? mark_held_locks+0xaf/0x100 [ 180.809416] ? mark_held_locks+0xaf/0x100 [ 180.813536] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 180.818519] ? retint_kernel+0x10/0x10 [ 180.822375] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 180.827367] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 180.832097] ? retint_kernel+0x10/0x10 [ 180.835958] ? tipc_sk_lookup+0x278/0xdf0 [ 180.840091] __tipc_nl_compat_dumpit.isra.10+0x20c/0xa10 [ 180.845523] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 180.850774] ? skb_put+0x149/0x1c0 [ 180.854284] ? tipc_tlv_sprintf+0x230/0x2d0 [ 180.858571] ? skb_put+0x149/0x1c0 [ 180.862093] ? nla_put+0xf9/0x130 [ 180.865517] tipc_nl_compat_sk_dump+0x834/0xbb0 [ 180.870152] ? check_noncircular+0x20/0x20 [ 180.874359] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 180.879947] ? __alloc_skb+0x548/0x740 [ 180.883803] ? skb_copy_and_csum_dev+0x360/0x360 [ 180.888524] ? validate_nla+0x1a7/0x5a0 [ 180.892463] ? tipc_nl_sk_dump+0x1990/0x1990 [ 180.896838] ? tipc_tlv_sprintf+0x2d0/0x2d0 [ 180.901134] ? nla_validate+0x1c0/0x1c0 [ 180.905086] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 180.910679] __tipc_nl_compat_dumpit.isra.10+0x30d/0xa10 [ 180.916113] ? __tipc_add_link_prop.isra.8+0x2d0/0x2d0 [ 180.921361] ? __might_sleep+0x95/0x190 [ 180.925315] ? genl_rcv_msg+0x115/0x140 [ 180.929264] ? skb_put+0x149/0x1c0 [ 180.932782] tipc_nl_compat_dumpit+0x1d2/0x410 [ 180.937336] tipc_nl_compat_recv+0x419/0x18f0 [ 180.941807] ? tipc_nl_compat_doit+0x660/0x660 [ 180.946361] ? check_noncircular+0x20/0x20 [ 180.950562] ? tipc_socket_stop+0x30/0x30 [ 180.954677] ? __tipc_nl_compat_dumpit.isra.10+0xa10/0xa10 [ 180.960283] genl_family_rcv_msg+0x7b7/0xfb0 [ 180.964665] ? genl_rcv+0x40/0x40 [ 180.968087] ? netlink_deliver_tap+0x14d/0xa60 [ 180.972636] ? lock_downgrade+0x990/0x990 [ 180.976753] ? lock_release+0xa40/0xa40 [ 180.980696] ? lock_acquire+0x1d5/0x580 [ 180.984651] genl_rcv_msg+0xb2/0x140 [ 180.988342] netlink_rcv_skb+0x216/0x440 [ 180.992370] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 180.996921] ? netlink_ack+0xab0/0xab0 [ 181.000785] ? genl_rcv+0x19/0x40 [ 181.004208] ? netlink_skb_destructor+0x1d0/0x1d0 [ 181.009025] ? selinux_nlmsg_lookup+0x32b/0x430 [ 181.013666] genl_rcv+0x28/0x40 [ 181.016913] netlink_unicast+0x4e8/0x6f0 [ 181.021038] ? netlink_attachskb+0x8a0/0x8a0 [ 181.025418] ? security_netlink_send+0x81/0xb0 [ 181.029977] netlink_sendmsg+0xa4a/0xe60 [ 181.034022] ? netlink_unicast+0x6f0/0x6f0 [ 181.038232] ? security_socket_sendmsg+0x89/0xb0 [ 181.042954] ? netlink_unicast+0x6f0/0x6f0 [ 181.047158] sock_sendmsg+0xca/0x110 [ 181.050847] sock_write_iter+0x31a/0x5d0 [ 181.054883] ? sock_sendmsg+0x110/0x110 [ 181.058836] ? iov_iter_init+0xaf/0x1d0 [ 181.062781] __vfs_write+0x684/0x970 [ 181.066464] ? default_llseek+0x290/0x290 [ 181.070584] ? selinux_capset+0x100/0x100