INIT: Entering runlevel: 2 [[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts. 2018/03/27 02:27:57 parsed 1 programs 2018/03/27 02:27:57 executed programs: 0 syzkaller login: [ 23.918686] IPVS: ftp: loaded support on port[0] = 21 [ 23.956961] WARNING: CPU: 0 PID: 4167 at ./include/net/sock.h:639 smc_unhash_sk+0x335/0x450 [ 23.965495] Kernel panic - not syncing: panic_on_warn set ... [ 23.965495] [ 23.972830] CPU: 0 PID: 4167 Comm: syz-executor0 Not tainted 4.16.0-rc6+ #282 [ 23.980075] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.989404] Call Trace: [ 23.991973] dump_stack+0x194/0x24d [ 23.995584] ? arch_local_irq_restore+0x53/0x53 [ 24.000227] ? vsnprintf+0x1ed/0x1900 [ 24.004007] panic+0x1e4/0x41c [ 24.007180] ? refcount_error_report+0x214/0x214 [ 24.011907] ? show_regs_print_info+0x18/0x18 [ 24.016375] ? __destroy_inode+0x660/0x660 [ 24.020585] ? __warn+0x1c1/0x200 [ 24.024023] ? smc_unhash_sk+0x335/0x450 [ 24.028067] __warn+0x1dc/0x200 [ 24.031320] ? smc_unhash_sk+0x335/0x450 [ 24.035355] report_bug+0x1f4/0x2b0 [ 24.038959] fixup_bug.part.11+0x37/0x80 [ 24.042992] do_error_trap+0x2d7/0x3e0 [ 24.046859] ? math_error+0x400/0x400 [ 24.050631] ? reacquire_held_locks+0x1f9/0x3e0 [ 24.055274] ? lock_acquire+0x1d5/0x580 [ 24.059222] ? lock_acquire+0x1d5/0x580 [ 24.063174] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.067992] do_invalid_op+0x1b/0x20 [ 24.071686] invalid_op+0x1b/0x40 [ 24.075111] RIP: 0010:smc_unhash_sk+0x335/0x450 [ 24.079745] RSP: 0018:ffff8801b931f198 EFLAGS: 00010293 [ 24.085083] RAX: ffff8801baaa62c0 RBX: 1ffff10037263e37 RCX: ffffffff85a66b25 [ 24.092325] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 1ffff10037263e3b [ 24.099567] RBP: ffff8801b931f280 R08: dffffc0000000000 R09: 0000000000000004 [ 24.106810] R10: ffff8801b931f050 R11: 0000000000000004 R12: ffff8801b931f258 [ 24.114050] R13: ffffffff876745a0 R14: ffff8801c0d0d7c0 R15: 1ffff10037263e3b [ 24.121304] ? smc_unhash_sk+0x335/0x450 [ 24.125341] ? smc_unhash_sk+0x335/0x450 [ 24.129375] ? smc_hash_sk+0x2f0/0x2f0 [ 24.133236] ? release_sock+0x1d4/0x2a0 [ 24.137185] ? __local_bh_enable_ip+0x121/0x230 [ 24.141825] ? __release_sock+0x360/0x360 [ 24.145945] ? smc_release+0x23d/0x580 [ 24.149806] ? trace_hardirqs_on+0xd/0x10 [ 24.153924] ? __local_bh_enable_ip+0x121/0x230 [ 24.158571] smc_release+0x322/0x580 [ 24.162266] sock_release+0x8d/0x1e0 [ 24.165951] ? sock_alloc_file+0x560/0x560 [ 24.170154] sock_close+0x16/0x20 [ 24.173582] __fput+0x327/0x7e0 [ 24.176847] ? fput+0x140/0x140 [ 24.180103] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.184577] ____fput+0x15/0x20 [ 24.187828] task_work_run+0x199/0x270 [ 24.191693] ? task_work_cancel+0x210/0x210 [ 24.195990] ? _raw_spin_unlock+0x22/0x30 [ 24.200115] ? switch_task_namespaces+0x87/0xc0 [ 24.204767] do_exit+0x9bb/0x1ad0 [ 24.208201] ? mm_update_next_owner+0x930/0x930 [ 24.212846] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 24.218014] ? remove_wait_queue+0x1b4/0x350 [ 24.222404] ? lock_downgrade+0x980/0x980 [ 24.226526] ? lock_release+0xa40/0xa40 [ 24.230475] ? smc_tcp_listen_work+0xea0/0xea0 [ 24.235037] ? do_raw_spin_trylock+0x190/0x190 [ 24.239603] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 24.244681] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.249670] ? trace_hardirqs_on+0xd/0x10 [ 24.253791] ? remove_wait_queue+0x1b4/0x350 [ 24.258173] ? set_normalized_timespec64+0x5a/0xb0 [ 24.263077] ? add_wait_queue+0x290/0x290 [ 24.267200] ? trace_hardirqs_off+0x10/0x10 [ 24.271495] ? fput+0xd2/0x140 [ 24.274660] ? poll_freewait+0x1c1/0x250 [ 24.278703] ? memset+0x31/0x40 [ 24.281959] ? find_held_lock+0x35/0x1d0 [ 24.286001] ? get_signal+0x7a9/0x16d0 [ 24.289876] ? lock_downgrade+0x980/0x980 [ 24.294020] do_group_exit+0x149/0x400 [ 24.297888] ? do_raw_spin_trylock+0x190/0x190 [ 24.302442] ? SyS_exit+0x30/0x30 [ 24.306198] ? _raw_spin_unlock_irq+0x27/0x70 [ 24.310673] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.315666] get_signal+0x73a/0x16d0 [ 24.319361] ? ptrace_notify+0x130/0x130 [ 24.323399] ? find_held_lock+0x35/0x1d0 [ 24.327454] do_signal+0x90/0x1e90 [ 24.330965] ? release_sock+0x1d4/0x2a0 [ 24.334912] ? ktime_get_ts64+0x15f/0x4d0 [ 24.339042] ? setup_sigcontext+0x7d0/0x7d0 [ 24.343340] ? timespec64_add_safe+0x1bb/0x2c0 [ 24.347896] ? nsec_to_clock_t+0x30/0x30 [ 24.351933] ? SYSC_bind+0x410/0x410 [ 24.355631] ? exit_to_usermode_loop+0x8c/0x2f0 [ 24.360290] exit_to_usermode_loop+0x258/0x2f0 [ 24.364856] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 24.370368] ? do_syscall_64+0xb7/0x940 [ 24.374320] do_syscall_64+0x6ec/0x940 [ 24.378178] ? __do_page_fault+0xc90/0xc90 [ 24.382384] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.387113] ? syscall_return_slowpath+0x550/0x550 [ 24.392021] ? syscall_return_slowpath+0x2ac/0x550 [ 24.396932] ? prepare_exit_to_usermode+0x350/0x350 [ 24.401926] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 24.407787] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 24.412612] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 24.417774] RIP: 0033:0x454879 [ 24.420938] RSP: 002b:00007fffc69edc28 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 [ 24.428625] RAX: 0000000000000001 RBX: 0000000001d8b914 RCX: 0000000000454879 [ 24.435868] RDX: 0000000000000080 RSI: 0000000000000001 RDI: 0000000020000080 [ 24.443108] RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 [ 24.450435] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 24.457674] R13: 0000000000000460 R14: 00000000006f89a0 R15: 0000000000000003 [ 24.465464] Dumping ftrace buffer: [ 24.469066] (ftrace buffer empty) [ 24.472746] Kernel Offset: disabled [ 24.476347] Rebooting in 86400 seconds..