[....] 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. [ 29.504312] kauditd_printk_skb: 7 callbacks suppressed [ 29.504326] audit: type=1800 audit(1544113941.553:29): pid=5892 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.530611] audit: type=1800 audit(1544113941.553:30): pid=5892 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.90' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.761857] WARNING: CPU: 0 PID: 6049 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 39.770438] Kernel panic - not syncing: panic_on_warn set ... [ 39.776460] CPU: 0 PID: 6049 Comm: syz-executor790 Not tainted 4.20.0-rc5+ #364 [ 39.784145] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.793938] Call Trace: [ 39.796523] dump_stack+0x244/0x39d [ 39.800317] ? dump_stack_print_info.cold.1+0x20/0x20 [ 39.805566] panic+0x2ad/0x55c [ 39.808745] ? add_taint.cold.5+0x16/0x16 [ 39.812888] ? __warn.cold.8+0x5/0x45 [ 39.816784] ? __warn+0xe8/0x1d0 [ 39.820142] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.824472] __warn.cold.8+0x20/0x45 [ 39.828198] ? rcu_softirq_qs+0x20/0x20 [ 39.832383] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.836647] report_bug+0x254/0x2d0 [ 39.840284] do_error_trap+0x11b/0x200 [ 39.844172] do_invalid_op+0x36/0x40 [ 39.848002] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.852242] invalid_op+0x14/0x20 [ 39.855681] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 39.860807] Code: 5f 5d c3 e8 35 2f bf ff 45 89 ec 31 ff 41 81 e4 00 00 04 00 44 89 e6 e8 31 30 bf ff 45 85 e4 0f 84 50 ff ff ff e8 13 2f bf ff <0f> 0b e9 44 ff ff ff e8 07 2f bf ff e8 22 5e ff ff 48 89 c3 e9 6b [ 39.880097] RSP: 0018:ffff8881b2f7f188 EFLAGS: 00010293 [ 39.885560] RAX: ffff8881c1dc2140 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 39.892815] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 39.900282] RBP: ffff8881b2f7f1c8 R08: ffff8881c1dc2140 R09: ffffed103b5c5b5f [ 39.907643] R10: 0000000000000002 R11: ffff8881dae2dafb R12: 0000000000040000 [ 39.915026] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 39.922524] ? alloc_pages_vma+0x1af/0x4a0 [ 39.926866] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.931217] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.935446] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 39.940676] ? __thp_get_unmapped_area+0x180/0x180 [ 39.945667] ? __lock_acquire+0x62f/0x4c20 [ 39.949901] ? print_usage_bug+0xc0/0xc0 [ 39.954074] ? print_usage_bug+0xc0/0xc0 [ 39.958187] ? print_usage_bug+0xc0/0xc0 [ 39.962357] ? __lock_acquire+0x62f/0x4c20 [ 39.966786] ? mark_held_locks+0x130/0x130 [ 39.971015] ? print_usage_bug+0xc0/0xc0 [ 39.975070] ? __lock_acquire+0x62f/0x4c20 [ 39.979415] ? __lock_acquire+0x62f/0x4c20 [ 39.983657] ? mark_held_locks+0x130/0x130 [ 39.987877] ? mark_held_locks+0x130/0x130 [ 39.992275] ? mark_held_locks+0x130/0x130 [ 39.996559] ? __lock_acquire+0x62f/0x4c20 [ 40.000796] __handle_mm_fault+0x3c91/0x5be0 [ 40.005202] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 40.010032] ? print_usage_bug+0xc0/0xc0 [ 40.014076] ? __lock_acquire+0x62f/0x4c20 [ 40.018301] ? zap_class+0x640/0x640 [ 40.022110] ? is_bpf_text_address+0xac/0x170 [ 40.026607] ? zap_class+0x640/0x640 [ 40.030318] ? zap_class+0x640/0x640 [ 40.034041] ? find_held_lock+0x36/0x1c0 [ 40.038116] ? handle_mm_fault+0x42a/0xc70 [ 40.042337] ? lock_downgrade+0x900/0x900 [ 40.046469] ? check_preemption_disabled+0x48/0x280 [ 40.051471] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 40.056521] ? kasan_check_read+0x11/0x20 [ 40.060670] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 40.065946] ? rcu_softirq_qs+0x20/0x20 [ 40.069922] ? trace_hardirqs_off_caller+0x310/0x310 [ 40.075021] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.080546] ? check_preemption_disabled+0x48/0x280 [ 40.085585] handle_mm_fault+0x54f/0xc70 [ 40.089640] ? __handle_mm_fault+0x5be0/0x5be0 [ 40.094212] ? find_vma+0x34/0x190 [ 40.097740] __do_page_fault+0x5e8/0xe60 [ 40.101793] do_page_fault+0xf2/0x7e0 [ 40.105589] ? vmalloc_sync_all+0x30/0x30 [ 40.109757] ? error_entry+0x76/0xd0 [ 40.113457] ? trace_hardirqs_off_caller+0xbb/0x310 [ 40.118469] ? find_held_lock+0x36/0x1c0 [ 40.122635] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.127626] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.132636] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.137739] page_fault+0x1e/0x30 [ 40.141305] RIP: 0010:__clear_user+0x3b/0x70 [ 40.145884] Code: f9 be 13 00 00 00 48 c7 c7 a0 47 d8 88 e8 ad 28 d8 f9 0f 1f 00 48 89 d8 48 c1 eb 03 4c 89 e7 83 e0 07 48 89 d9 48 85 c9 74 0f <48> c7 07 00 00 00 00 48 83 c7 08 ff c9 75 f1 48 89 c1 85 c9 74 0a [ 40.164793] RSP: 0018:ffff8881b2f7fbc8 EFLAGS: 00010206 [ 40.170260] RAX: 0000000000000000 RBX: 000000000000000f RCX: 000000000000000f [ 40.177713] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8008 [ 40.185090] RBP: ffff8881b2f7fbd8 R08: 1ffff110365eff55 R09: 0000000000000008 [ 40.192345] R10: 0000000000000001 R11: ffff8881c1dc2140 R12: 00000000203e8008 [ 40.199607] R13: 00000000203e8008 R14: 00007ffffffff000 R15: 0000000000000000 [ 40.206975] ? __might_fault+0x1a3/0x1e0 [ 40.211025] ? __clear_user+0x23/0x70 [ 40.214830] clear_user+0xb1/0xe0 [ 40.218283] kernel_get_mempolicy+0x292/0x1100 [ 40.223004] ? sp_free+0x60/0x60 [ 40.226377] ? __mpol_equal+0x370/0x370 [ 40.230446] ? up_read+0x77/0x2c0 [ 40.233912] ? up_read_non_owner+0x100/0x100 [ 40.238340] ? do_syscall_64+0x9a/0x820 [ 40.242433] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 40.247165] ? trace_hardirqs_on+0xbd/0x310 [ 40.251476] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.256822] ? trace_hardirqs_off_caller+0x310/0x310 [ 40.261913] __x64_sys_get_mempolicy+0xbe/0x150 [ 40.266581] do_syscall_64+0x1b9/0x820 [ 40.270451] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.275926] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.280841] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.285671] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.290673] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.295809] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.300845] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.305687] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.310856] RIP: 0033:0x440009 [ 40.314038] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.332931] RSP: 002b:00007ffed31aed28 EFLAGS: 00000217 ORIG_RAX: 00000000000000ef [ 40.340624] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 40.348085] RDX: 0000000000000401 RSI: 00000000203e8000 RDI: 0000000000000000 [ 40.355501] RBP: 00000000006ca018 R08: 0000000000000002 R09: 0000000000000000 [ 40.362757] R10: 0000000020336000 R11: 0000000000000217 R12: 0000000000401890 [ 40.370011] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 40.378547] Kernel Offset: disabled [ 40.382234] Rebooting in 86400 seconds..