[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 15.966511] rsyslogd (4282) used greatest stack depth: 17328 bytes left [?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 '10.128.10.6' (ECDSA) to the list of known hosts. 2018/03/27 08:15:46 parsed 1 programs 2018/03/27 08:15:46 executed programs: 0 syzkaller login: [ 38.157647] IPVS: ftp: loaded support on port[0] = 21 [ 38.196199] WARNING: CPU: 0 PID: 4424 at ./include/net/sock.h:638 smc_unhash_sk+0x335/0x450 [ 38.204738] Kernel panic - not syncing: panic_on_warn set ... [ 38.204738] [ 38.212158] CPU: 0 PID: 4424 Comm: syz-executor0 Not tainted 4.16.0-rc7+ #368 [ 38.219400] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.228722] Call Trace: [ 38.231286] dump_stack+0x194/0x24d [ 38.234887] ? arch_local_irq_restore+0x53/0x53 [ 38.239529] ? vsnprintf+0x1ed/0x1900 [ 38.243307] panic+0x1e4/0x41c [ 38.246478] ? refcount_error_report+0x214/0x214 [ 38.251291] ? show_regs_print_info+0x18/0x18 [ 38.255764] ? __destroy_inode+0x660/0x660 [ 38.259973] ? __warn+0x1c1/0x200 [ 38.263488] ? smc_unhash_sk+0x335/0x450 [ 38.267520] __warn+0x1dc/0x200 [ 38.270774] ? smc_unhash_sk+0x335/0x450 [ 38.274809] report_bug+0x1f4/0x2b0 [ 38.278410] fixup_bug.part.11+0x37/0x80 [ 38.282447] do_error_trap+0x2d7/0x3e0 [ 38.286329] ? math_error+0x400/0x400 [ 38.290107] ? reacquire_held_locks+0x1f9/0x3e0 [ 38.294750] ? lock_acquire+0x1d5/0x580 [ 38.298694] ? lock_acquire+0x1d5/0x580 [ 38.302645] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.307459] do_invalid_op+0x1b/0x20 [ 38.311144] invalid_op+0x1b/0x40 [ 38.314567] RIP: 0010:smc_unhash_sk+0x335/0x450 [ 38.319207] RSP: 0018:ffff8801b1597198 EFLAGS: 00010293 [ 38.324540] RAX: ffff8801b192e380 RBX: 1ffff100362b2e37 RCX: ffffffff86482335 [ 38.331781] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 1ffff100362b2e3b [ 38.339019] RBP: ffff8801b1597280 R08: dffffc0000000000 R09: 0000000000000004 [ 38.346260] R10: ffff8801b1597050 R11: 0000000000000004 R12: ffff8801b1597258 [ 38.353499] R13: ffffffff88338d80 R14: ffff8801b37cc7c0 R15: 1ffff100362b2e3b [ 38.360751] ? smc_unhash_sk+0x335/0x450 [ 38.364788] ? smc_unhash_sk+0x335/0x450 [ 38.368824] ? smc_hash_sk+0x2f0/0x2f0 [ 38.372683] ? release_sock+0x1d4/0x2a0 [ 38.376715] ? __local_bh_enable_ip+0x121/0x230 [ 38.381368] ? __release_sock+0x360/0x360 [ 38.385494] ? smc_release+0x23d/0x580 [ 38.389357] ? trace_hardirqs_on+0xd/0x10 [ 38.393471] ? __local_bh_enable_ip+0x121/0x230 [ 38.398112] smc_release+0x322/0x580 [ 38.401804] sock_release+0x8d/0x1e0 [ 38.405491] ? sock_alloc_file+0x560/0x560 [ 38.409703] sock_close+0x16/0x20 [ 38.413129] __fput+0x327/0x7e0 [ 38.416386] ? fput+0x140/0x140 [ 38.419647] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.424119] ____fput+0x15/0x20 [ 38.427815] task_work_run+0x199/0x270 [ 38.431678] ? task_work_cancel+0x210/0x210 [ 38.435978] ? _raw_spin_unlock+0x22/0x30 [ 38.440096] ? switch_task_namespaces+0x87/0xc0 [ 38.444743] do_exit+0x9bb/0x1ad0 [ 38.448174] ? mm_update_next_owner+0x930/0x930 [ 38.452817] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 38.457983] ? remove_wait_queue+0x1b4/0x350 [ 38.462361] ? lock_downgrade+0x980/0x980 [ 38.466483] ? lock_release+0xa40/0xa40 [ 38.470427] ? smc_tcp_listen_work+0xe60/0xe60 [ 38.474988] ? do_raw_spin_trylock+0x190/0x190 [ 38.479544] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 38.484622] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.489606] ? trace_hardirqs_on+0xd/0x10 [ 38.493736] ? remove_wait_queue+0x1b4/0x350 [ 38.498121] ? set_normalized_timespec64+0x5a/0xb0 [ 38.503025] ? add_wait_queue+0x290/0x290 [ 38.507151] ? trace_hardirqs_off+0x10/0x10 [ 38.511631] ? fput+0xd2/0x140 [ 38.514810] ? poll_freewait+0x1c1/0x250 [ 38.518846] ? memset+0x31/0x40 [ 38.522106] ? find_held_lock+0x35/0x1d0 [ 38.526148] ? get_signal+0x7a9/0x16d0 [ 38.530007] ? lock_downgrade+0x980/0x980 [ 38.534133] do_group_exit+0x149/0x400 [ 38.537993] ? do_raw_spin_trylock+0x190/0x190 [ 38.542547] ? SyS_exit+0x30/0x30 [ 38.545972] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.550441] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 38.555434] get_signal+0x73a/0x16d0 [ 38.559128] ? ptrace_notify+0x130/0x130 [ 38.563163] ? find_held_lock+0x35/0x1d0 [ 38.567216] do_signal+0x90/0x1e90 [ 38.570728] ? release_sock+0x1d4/0x2a0 [ 38.574672] ? ktime_get_ts64+0x15f/0x4d0 [ 38.578798] ? setup_sigcontext+0x7d0/0x7d0 [ 38.583101] ? timespec64_add_safe+0x1bb/0x2c0 [ 38.587658] ? nsec_to_clock_t+0x30/0x30 [ 38.591693] ? SYSC_bind+0x410/0x410 [ 38.595391] ? exit_to_usermode_loop+0x8c/0x2f0 [ 38.600040] exit_to_usermode_loop+0x258/0x2f0 [ 38.604599] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 38.610110] ? do_syscall_64+0xb7/0x940 [ 38.614065] do_syscall_64+0x6ec/0x940 [ 38.617922] ? __do_page_fault+0xc90/0xc90 [ 38.622131] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 38.627642] ? syscall_return_slowpath+0x550/0x550 [ 38.632542] ? syscall_return_slowpath+0x2ac/0x550 [ 38.637451] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 38.642789] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.647608] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 38.652767] RIP: 0033:0x454879 [ 38.655941] RSP: 002b:00007ffebce2ff08 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 [ 38.663628] RAX: 0000000000000001 RBX: 0000000001054914 RCX: 0000000000454879 [ 38.670870] RDX: 0000000000000080 RSI: 0000000000000001 RDI: 0000000020000080 [ 38.678109] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 38.685349] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 38.692599] R13: 0000000000000460 R14: 00000000006f89a0 R15: 0000000000000003 [ 38.700451] Dumping ftrace buffer: [ 38.704077] (ftrace buffer empty) [ 38.707764] Kernel Offset: disabled [ 38.711367] Rebooting in 86400 seconds..