[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.262648] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.368899] random: sshd: uninitialized urandom read (32 bytes read) [ 23.732263] random: sshd: uninitialized urandom read (32 bytes read) [ 24.568056] random: sshd: uninitialized urandom read (32 bytes read) [ 351.342967] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts. [ 356.858181] random: sshd: uninitialized urandom read (32 bytes read) 2018/06/30 12:10:35 parsed 1 programs [ 358.359244] random: cc1: uninitialized urandom read (8 bytes read) 2018/06/30 12:10:38 executed programs: 0 [ 359.716560] IPVS: ftp: loaded support on port[0] = 21 [ 359.910574] bridge0: port 1(bridge_slave_0) entered blocking state [ 359.917076] bridge0: port 1(bridge_slave_0) entered disabled state [ 359.924308] device bridge_slave_0 entered promiscuous mode [ 359.940793] bridge0: port 2(bridge_slave_1) entered blocking state [ 359.947171] bridge0: port 2(bridge_slave_1) entered disabled state [ 359.954225] device bridge_slave_1 entered promiscuous mode [ 359.969200] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 359.984794] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 360.024361] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 360.041591] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 360.101210] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 360.108478] team0: Port device team_slave_0 added [ 360.123154] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 360.130407] team0: Port device team_slave_1 added [ 360.144884] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 360.160951] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 360.177494] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 360.194176] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 360.305255] bridge0: port 2(bridge_slave_1) entered blocking state [ 360.311756] bridge0: port 2(bridge_slave_1) entered forwarding state [ 360.318613] bridge0: port 1(bridge_slave_0) entered blocking state [ 360.325066] bridge0: port 1(bridge_slave_0) entered forwarding state [ 360.716979] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 360.723106] 8021q: adding VLAN 0 to HW filter on device bond0 [ 360.765775] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 360.807485] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 360.814762] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 360.849287] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 360.855401] 8021q: adding VLAN 0 to HW filter on device team0 [ 360.861619] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready 2018/06/30 12:10:43 executed programs: 180 [ 367.499263] WARNING: CPU: 1 PID: 6037 at kernel/locking/lockdep.c:704 register_lock_class+0xce6/0x2650 [ 367.508723] Kernel panic - not syncing: panic_on_warn set ... [ 367.508723] [ 367.516067] CPU: 1 PID: 6037 Comm: syz-executor0 Not tainted 4.18.0-rc2+ #26 [ 367.523227] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 367.532633] Call Trace: [ 367.535262] dump_stack+0x1c9/0x2b4 [ 367.538872] ? dump_stack_print_info.cold.2+0x52/0x52 [ 367.544046] panic+0x238/0x4e7 [ 367.547217] ? add_taint.cold.5+0x16/0x16 [ 367.551342] ? __warn.cold.8+0x148/0x1ba [ 367.555379] ? __warn.cold.8+0x117/0x1ba [ 367.559418] ? register_lock_class+0xce6/0x2650 [ 367.564078] __warn.cold.8+0x163/0x1ba [ 367.567953] ? register_lock_class+0xce6/0x2650 [ 367.572602] report_bug+0x252/0x2d0 [ 367.576213] do_error_trap+0x1fc/0x4d0 [ 367.580089] ? math_error+0x3e0/0x3e0 [ 367.583870] ? trace_hardirqs_on+0x10/0x10 [ 367.588085] ? update_cfs_group+0x360/0x590 [ 367.592387] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 367.597207] do_invalid_op+0x1b/0x20 [ 367.600922] invalid_op+0x14/0x20 [ 367.604357] RIP: 0010:register_lock_class+0xce6/0x2650 [ 367.609623] Code: f9 ff ff 4c 89 ff 44 89 85 68 fc ff ff 89 8d 70 fc ff ff e8 cc 99 5b 00 44 8b 85 68 fc ff ff 8b 8d 70 fc ff ff e9 6f f9 ff ff <0f> 0b e9 c8 f6 ff ff 48 8d 50 01 48 89 15 28 22 22 09 48 8d 14 80 [ 367.628713] RSP: 0018:ffff8801ae596da8 EFLAGS: 00010083 [ 367.634059] RAX: 0000000000000004 RBX: ffffffff8a5bf340 RCX: 0000000000000000 [ 367.641310] RDX: ffffffff887db060 RSI: ffffffff886d1ee0 RDI: 1ffffffff154956c [ 367.648563] RBP: ffff8801ae5971b0 R08: 0000000000000000 R09: dffffc0000000000 [ 367.655819] R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff10035cb2dc5 [ 367.663076] R13: 0000000000000003 R14: 0000000000000000 R15: ffff8801ae4390e0 [ 367.670346] ? graph_lock+0x170/0x170 [ 367.674135] ? find_held_lock+0x36/0x1c0 [ 367.678198] ? check_noncircular+0x20/0x20 [ 367.682418] ? find_held_lock+0x36/0x1c0 [ 367.686460] ? lock_downgrade+0x8f0/0x8f0 [ 367.690592] ? finish_task_switch+0x18a/0x890 [ 367.695072] ? kasan_check_read+0x11/0x20 [ 367.699198] ? do_raw_spin_unlock+0xa7/0x2f0 [ 367.703583] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 367.708148] ? compat_start_thread+0x80/0x80 [ 367.712537] ? _raw_spin_unlock_irq+0x27/0x70 [ 367.717016] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 367.722025] ? trace_hardirqs_on+0xd/0x10 [ 367.726155] ? _raw_spin_unlock_irq+0x27/0x70 [ 367.730632] ? finish_task_switch+0x18a/0x890 [ 367.735108] ? preempt_notifier_register+0x200/0x200 [ 367.740210] ? print_usage_bug+0xc0/0xc0 [ 367.744275] ? __schedule+0x884/0x1ed0 [ 367.748145] __lock_acquire+0x1bd/0x5020 [ 367.752182] ? __lock_acquire+0x7fc/0x5020 [ 367.756400] ? graph_lock+0x170/0x170 [ 367.760187] ? plist_check_list+0xa0/0xa0 [ 367.764325] ? trace_hardirqs_on+0x10/0x10 [ 367.768547] ? trace_hardirqs_on+0x10/0x10 [ 367.772770] ? check_same_owner+0x340/0x340 [ 367.777072] ? do_raw_spin_unlock+0xa7/0x2f0 [ 367.781459] ? rcu_note_context_switch+0x730/0x730 [ 367.786367] ? lock_acquire+0x1e4/0x540 [ 367.790329] ? graph_lock+0x170/0x170 [ 367.794110] ? refill_pi_state_cache.part.8+0x320/0x320 [ 367.799453] ? kasan_check_write+0x14/0x20 [ 367.803665] ? do_raw_spin_lock+0xc1/0x200 [ 367.807878] lock_acquire+0x1e4/0x540 [ 367.811712] ? lock_sock_nested+0x46/0x120 [ 367.815926] ? lock_release+0xa30/0xa30 [ 367.819878] ? check_same_owner+0x340/0x340 [ 367.824173] ? check_same_owner+0x340/0x340 [ 367.828474] ? rcu_note_context_switch+0x730/0x730 [ 367.833382] _raw_spin_lock_bh+0x31/0x40 [ 367.837428] ? lock_sock_nested+0x46/0x120 [ 367.841646] lock_sock_nested+0x46/0x120 [ 367.845757] do_ipv6_setsockopt.isra.9+0x5ba/0x4680 [ 367.850760] ? ipv6_update_options+0x390/0x390 [ 367.855322] ? save_stack+0x43/0xd0 [ 367.858926] ? kasan_kmalloc+0xc4/0xe0 [ 367.862790] ? kmem_cache_alloc+0x12e/0x760 [ 367.867092] ? get_empty_filp+0x12d/0x530 [ 367.871216] ? alloc_file+0x24/0x3e0 [ 367.874908] ? sock_alloc_file+0x1fb/0x500 [ 367.879119] ? __sys_socket+0x172/0x260 [ 367.883072] ? do_futex+0x249/0x27d0 [ 367.886767] ? lock_downgrade+0x8f0/0x8f0 [ 367.890896] ? graph_lock+0x170/0x170 [ 367.894680] ? kasan_check_read+0x11/0x20 [ 367.898807] ? exit_robust_list+0x290/0x290 [ 367.903107] ? graph_lock+0x170/0x170 [ 367.906892] ? find_held_lock+0x36/0x1c0 [ 367.910944] ? lock_downgrade+0x8f0/0x8f0 [ 367.915076] ? kasan_check_read+0x11/0x20 [ 367.919208] ? rcu_is_watching+0x8c/0x150 [ 367.923339] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 367.927725] ? __fget+0x414/0x670 [ 367.931155] ? expand_files.part.8+0x9c0/0x9c0 [ 367.935713] ? get_unused_fd_flags+0x1a0/0x1a0 [ 367.940277] compat_ipv6_setsockopt+0x117/0x210 [ 367.944933] ? compat_ipv6_setsockopt+0x117/0x210 [ 367.949839] compat_udpv6_setsockopt+0x62/0xa0 [ 367.954401] compat_sock_common_setsockopt+0xb4/0x150 [ 367.959580] ? udpv6_destroy_sock+0x1b0/0x1b0 [ 367.964053] ? sock_common_setsockopt+0xe0/0xe0 [ 367.968761] __compat_sys_setsockopt+0x1b3/0x860 [ 367.973500] ? __compat_sys_getsockopt+0x890/0x890 [ 367.978410] ? __x32_compat_sys_get_robust_list+0x430/0x430 [ 367.984104] ? move_addr_to_kernel+0x70/0x70 [ 367.988504] ? syscall_slow_exit_work+0x500/0x500 [ 367.993327] __ia32_compat_sys_setsockopt+0xbd/0x150 [ 367.998410] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 368.003413] do_fast_syscall_32+0x34d/0xfb2 [ 368.007725] ? do_int80_syscall_32+0x890/0x890 [ 368.012297] ? kasan_check_write+0x14/0x20 [ 368.016517] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 368.022044] ? syscall_return_slowpath+0x31d/0x5e0 [ 368.027020] ? sysret32_from_system_call+0x5/0x46 [ 368.031850] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 368.036680] entry_SYSENTER_compat+0x70/0x7f [ 368.041068] RIP: 0023:0xf7f1bcb9 [ 368.044406] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 368.063491] RSP: 002b:00000000f7ef60ac EFLAGS: 00000282 ORIG_RAX: 000000000000016e [ 368.071176] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000029 [ 368.078422] RDX: 0000000000000037 RSI: 0000000020000000 RDI: 0000000000000010 [ 368.085667] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 368.092918] R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 [ 368.100168] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 368.107880] Dumping ftrace buffer: [ 368.111400] (ftrace buffer empty) [ 368.115086] Kernel Offset: disabled [ 368.118696] Rebooting in 86400 seconds..