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 syzkaller login: [ 22.231458] sshd (4404) used greatest stack depth: 16680 bytes left Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. [ 27.884852] IPVS: ftp: loaded support on port[0] = 21 executing program [ 27.916984] IPVS: ftp: loaded support on port[0] = 21 [ 27.922868] WARNING: CPU: 1 PID: 4435 at ./include/net/sock.h:638 smc_unhash_sk+0x335/0x450 [ 27.931454] Kernel panic - not syncing: panic_on_warn set ... [ 27.931454] [ 27.938811] CPU: 1 PID: 4435 Comm: syzkaller270750 Not tainted 4.16.0-rc7+ #3 [ 27.946071] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.951471] IPVS: ftp: loaded support on port[0] = 21 [ 27.955414] Call Trace: [ 27.955436] dump_stack+0x194/0x24d executing program [ 27.955450] ? arch_local_irq_restore+0x53/0x53 [ 27.971462] ? vsnprintf+0x1ed/0x1900 [ 27.975273] panic+0x1e4/0x41c [ 27.978465] ? refcount_error_report+0x214/0x214 [ 27.983213] ? show_regs_print_info+0x18/0x18 [ 27.987711] ? __destroy_inode+0x660/0x660 [ 27.991951] ? __warn+0x1c1/0x200 [ 27.995407] ? smc_unhash_sk+0x335/0x450 [ 27.999464] __warn+0x1dc/0x200 [ 27.999530] IPVS: ftp: loaded support on port[0] = 21 [ 28.002731] ? smc_unhash_sk+0x335/0x450 [ 28.002747] report_bug+0x1f4/0x2b0 [ 28.015580] fixup_bug.part.11+0x37/0x80 [ 28.019640] do_error_trap+0x2d7/0x3e0 [ 28.023517] ? math_error+0x400/0x400 [ 28.027292] ? reacquire_held_locks+0x1f9/0x3e0 [ 28.031941] ? lock_acquire+0x1d5/0x580 [ 28.035889] ? lock_acquire+0x1d5/0x580 [ 28.039846] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.044671] do_invalid_op+0x1b/0x20 [ 28.048361] invalid_op+0x1b/0x40 [ 28.051794] RIP: 0010:smc_unhash_sk+0x335/0x450 [ 28.056521] RSP: 0018:ffff8801b4a1f198 EFLAGS: 00010293 [ 28.061857] RAX: ffff8801b7334640 RBX: 1ffff10036943e37 RCX: ffffffff86482335 [ 28.069102] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 1ffff10036943e3b [ 28.076354] RBP: ffff8801b4a1f280 R08: dffffc0000000000 R09: 0000000000000004 [ 28.083598] R10: ffff8801b4a1f050 R11: 0000000000000004 R12: ffff8801b4a1f258 [ 28.090840] R13: ffffffff88338d80 R14: ffff8801b717e7c0 R15: 1ffff10036943e3b [ 28.098098] ? smc_unhash_sk+0x335/0x450 [ 28.102139] ? smc_unhash_sk+0x335/0x450 [ 28.106179] ? smc_hash_sk+0x2f0/0x2f0 [ 28.110048] ? release_sock+0x1d4/0x2a0 [ 28.114007] ? __local_bh_enable_ip+0x121/0x230 [ 28.118660] ? __release_sock+0x360/0x360 [ 28.122785] ? smc_release+0x23d/0x580 [ 28.126646] ? trace_hardirqs_on+0xd/0x10 [ 28.130769] ? __local_bh_enable_ip+0x121/0x230 [ 28.135415] smc_release+0x322/0x580 [ 28.139110] sock_release+0x8d/0x1e0 [ 28.142798] ? sock_alloc_file+0x560/0x560 [ 28.147011] sock_close+0x16/0x20 [ 28.150443] __fput+0x327/0x7e0 [ 28.153704] ? fput+0x140/0x140 [ 28.156963] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.161439] ____fput+0x15/0x20 [ 28.164695] task_work_run+0x199/0x270 [ 28.168559] ? task_work_cancel+0x210/0x210 [ 28.172855] ? _raw_spin_unlock+0x22/0x30 [ 28.176976] ? switch_task_namespaces+0x87/0xc0 [ 28.181626] do_exit+0x9bb/0x1ad0 [ 28.185060] ? mm_update_next_owner+0x930/0x930 [ 28.189708] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 28.194869] ? __lock_acquire+0x664/0x3e00 [ 28.199090] ? remove_wait_queue+0x1b4/0x350 [ 28.203476] ? trace_hardirqs_off+0x10/0x10 [ 28.207769] ? __lock_is_held+0xb6/0x140 [ 28.211812] ? trace_hardirqs_off+0x10/0x10 [ 28.216118] ? __lock_is_held+0xb6/0x140 [ 28.220152] ? __account_cfs_rq_runtime+0x600/0x600 [ 28.225148] ? find_held_lock+0x35/0x1d0 [ 28.229196] ? kprobe_flush_task+0x1a3/0x5d0 [ 28.233577] ? trace_hardirqs_off+0x10/0x10 [ 28.237871] ? lock_downgrade+0x980/0x980 [ 28.242001] ? lock_release+0xa40/0xa40 [ 28.245962] ? memset+0x31/0x40 [ 28.249224] ? find_held_lock+0x35/0x1d0 [ 28.253269] ? get_signal+0x7a9/0x16d0 [ 28.257132] ? lock_downgrade+0x980/0x980 [ 28.261274] do_group_exit+0x149/0x400 [ 28.265145] ? do_raw_spin_trylock+0x190/0x190 [ 28.269703] ? SyS_exit+0x30/0x30 [ 28.273135] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.277608] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.282606] get_signal+0x73a/0x16d0 [ 28.286303] ? ptrace_notify+0x130/0x130 [ 28.290342] ? __schedule+0x903/0x1ec0 [ 28.294211] ? __sched_text_start+0x8/0x8 [ 28.298348] do_signal+0x90/0x1e90 [ 28.301865] ? release_sock+0x1d4/0x2a0 [ 28.305817] ? ktime_get_ts64+0x15f/0x4d0 [ 28.309949] ? setup_sigcontext+0x7d0/0x7d0 [ 28.314252] ? schedule+0xf5/0x430 [ 28.317770] ? nsec_to_clock_t+0x30/0x30 [ 28.321804] ? __schedule+0x1ec0/0x1ec0 [ 28.325751] ? SYSC_bind+0x410/0x410 [ 28.329455] ? exit_to_usermode_loop+0x8c/0x2f0 [ 28.334106] exit_to_usermode_loop+0x258/0x2f0 [ 28.338664] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 28.344178] ? do_syscall_64+0xb7/0x940 [ 28.348132] do_syscall_64+0x6ec/0x940 [ 28.351992] ? __do_page_fault+0xc90/0xc90 [ 28.356203] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.360695] ? finish_task_switch+0x1c1/0x7e0 [ 28.365170] ? syscall_return_slowpath+0x550/0x550 [ 28.370076] ? syscall_return_slowpath+0x2ac/0x550 [ 28.374979] ? prepare_exit_to_usermode+0x350/0x350 [ 28.379972] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 28.385314] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.390151] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 28.395314] RIP: 0033:0x446a59 [ 28.398477] RSP: 002b:00007f65a7522db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 [ 28.406171] RAX: 0000000000000001 RBX: 00000000006e29e4 RCX: 0000000000446a59 [ 28.413415] RDX: 0000000000000080 RSI: 0000000000000001 RDI: 0000000020000080 [ 28.420657] RBP: 00000000006e29e0 R08: 0000000000000000 R09: 0000000000000000 [ 28.427902] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 28.435155] R13: 00007ffecab23b6f R14: 00007f65a75239c0 R15: 0000000000000003 [ 28.443133] Dumping ftrace buffer: [ 28.446776] (ftrace buffer empty) [ 28.450462] Kernel Offset: disabled [ 28.454063] Rebooting in 86400 seconds..