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 '10.128.0.42' (ECDSA) to the list of known hosts. 2018/03/27 09:26:56 parsed 1 programs 2018/03/27 09:26:56 executed programs: 0 syzkaller login: [ 28.039201] IPVS: ftp: loaded support on port[0] = 21 [ 28.079961] WARNING: CPU: 0 PID: 4419 at ./include/net/sock.h:638 smc_unhash_sk+0x335/0x450 [ 28.088520] Kernel panic - not syncing: panic_on_warn set ... [ 28.088520] [ 28.095859] CPU: 0 PID: 4419 Comm: syz-executor0 Not tainted 4.16.0-rc7+ #278 [ 28.103461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.112787] Call Trace: [ 28.115357] dump_stack+0x194/0x24d [ 28.118966] ? arch_local_irq_restore+0x53/0x53 [ 28.123618] ? vsnprintf+0x1ed/0x1900 [ 28.127397] panic+0x1e4/0x41c [ 28.130561] ? refcount_error_report+0x214/0x214 [ 28.135294] ? show_regs_print_info+0x18/0x18 [ 28.139769] ? __destroy_inode+0x660/0x660 [ 28.143983] ? __warn+0x1c1/0x200 [ 28.147416] ? smc_unhash_sk+0x335/0x450 [ 28.151448] __warn+0x1dc/0x200 [ 28.154704] ? smc_unhash_sk+0x335/0x450 [ 28.158739] report_bug+0x1f4/0x2b0 [ 28.162343] fixup_bug.part.11+0x37/0x80 [ 28.166391] do_error_trap+0x2d7/0x3e0 [ 28.170256] ? math_error+0x400/0x400 [ 28.174034] ? reacquire_held_locks+0x1f9/0x3e0 [ 28.178687] ? lock_acquire+0x1d5/0x580 [ 28.182635] ? lock_acquire+0x1d5/0x580 [ 28.186599] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.191424] do_invalid_op+0x1b/0x20 [ 28.195124] invalid_op+0x1b/0x40 [ 28.198563] RIP: 0010:smc_unhash_sk+0x335/0x450 [ 28.203203] RSP: 0018:ffff8801b4897148 EFLAGS: 00010293 [ 28.208539] RAX: ffff8801b595a280 RBX: 1ffff10036912e2d RCX: ffffffff86482335 [ 28.215780] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 1ffff10036912e31 [ 28.223033] RBP: ffff8801b4897230 R08: dffffc0000000000 R09: 0000000000000004 [ 28.230282] R10: ffff8801b4897000 R11: 0000000000000004 R12: ffff8801b4897208 [ 28.237524] R13: ffffffff88338d80 R14: ffff8801d40ba7c0 R15: 1ffff10036912e31 [ 28.244783] ? smc_unhash_sk+0x335/0x450 [ 28.248824] ? smc_unhash_sk+0x335/0x450 [ 28.252861] ? smc_hash_sk+0x2f0/0x2f0 [ 28.256727] ? release_sock+0x1d4/0x2a0 [ 28.260675] ? __local_bh_enable_ip+0x121/0x230 [ 28.265415] ? __release_sock+0x360/0x360 [ 28.269539] ? smc_release+0x23d/0x580 [ 28.273401] ? trace_hardirqs_on+0xd/0x10 [ 28.277523] ? __local_bh_enable_ip+0x121/0x230 [ 28.282171] smc_release+0x322/0x580 [ 28.285869] sock_release+0x8d/0x1e0 [ 28.289573] ? sock_alloc_file+0x560/0x560 [ 28.293780] sock_close+0x16/0x20 [ 28.297206] __fput+0x327/0x7e0 [ 28.300465] ? fput+0x140/0x140 [ 28.303732] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.308206] ____fput+0x15/0x20 [ 28.311460] task_work_run+0x199/0x270 [ 28.315336] ? task_work_cancel+0x210/0x210 [ 28.319639] ? _raw_spin_unlock+0x22/0x30 [ 28.323769] ? switch_task_namespaces+0x87/0xc0 [ 28.328428] do_exit+0x9bb/0x1ad0 [ 28.331864] ? mm_update_next_owner+0x930/0x930 [ 28.336522] ? debug_check_no_locks_freed+0x3c0/0x3c0 [ 28.341689] ? remove_wait_queue+0x1b4/0x350 [ 28.346073] ? lock_downgrade+0x980/0x980 [ 28.350202] ? lock_release+0xa40/0xa40 [ 28.354160] ? smc_tcp_listen_work+0xe60/0xe60 [ 28.358729] ? do_raw_spin_trylock+0x190/0x190 [ 28.363299] ? _raw_spin_unlock_irqrestore+0x31/0xc0 [ 28.368381] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.373374] ? trace_hardirqs_on+0xd/0x10 [ 28.377500] ? remove_wait_queue+0x1b4/0x350 [ 28.381884] ? set_normalized_timespec64+0x5a/0xb0 [ 28.386788] ? add_wait_queue+0x290/0x290 [ 28.390914] ? trace_hardirqs_off+0x10/0x10 [ 28.395211] ? fput+0xd2/0x140 [ 28.398380] ? poll_freewait+0x1c1/0x250 [ 28.402417] ? memset+0x31/0x40 [ 28.405674] ? find_held_lock+0x35/0x1d0 [ 28.409714] ? get_signal+0x7a9/0x16d0 [ 28.413576] ? lock_downgrade+0x980/0x980 [ 28.417705] do_group_exit+0x149/0x400 [ 28.421569] ? do_raw_spin_trylock+0x190/0x190 [ 28.426126] ? SyS_exit+0x30/0x30 [ 28.429552] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.434029] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.439035] get_signal+0x73a/0x16d0 [ 28.442743] ? ptrace_notify+0x130/0x130 [ 28.446783] ? find_held_lock+0x35/0x1d0 [ 28.450841] do_signal+0x90/0x1e90 [ 28.454360] ? release_sock+0x1d4/0x2a0 [ 28.458306] ? ktime_get_ts64+0x15f/0x4d0 [ 28.462434] ? setup_sigcontext+0x7d0/0x7d0 [ 28.466743] ? timespec64_add_safe+0x1bb/0x2c0 [ 28.471313] ? nsec_to_clock_t+0x30/0x30 [ 28.475366] ? SYSC_bind+0x410/0x410 [ 28.479077] ? exit_to_usermode_loop+0x8c/0x2f0 [ 28.483728] exit_to_usermode_loop+0x258/0x2f0 [ 28.488288] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 28.493799] ? do_fast_syscall_32+0x156/0xf9f [ 28.498273] do_fast_syscall_32+0xbe6/0xf9f [ 28.502578] ? do_int80_syscall_32+0x9c0/0x9c0 [ 28.507134] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.511869] ? syscall_return_slowpath+0x2ac/0x550 [ 28.516774] ? prepare_exit_to_usermode+0x350/0x350 [ 28.521767] ? sysret32_from_system_call+0x5/0x3c [ 28.526589] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.531412] entry_SYSENTER_compat+0x70/0x7f [ 28.535792] RIP: 0023:0xf7f8dc99 [ 28.539126] RSP: 002b:00000000ffa9b7ec EFLAGS: 00000286 ORIG_RAX: 00000000000000a8 [ 28.546805] RAX: 0000000000000001 RBX: 0000000020000080 RCX: 0000000000000001 [ 28.554048] RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000000 [ 28.561290] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 28.568532] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 28.575774] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.583629] Dumping ftrace buffer: [ 28.587236] (ftrace buffer empty) [ 28.590933] Kernel Offset: disabled [ 28.594534] Rebooting in 86400 seconds..