[....] 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. [ 28.704070] kauditd_printk_skb: 8 callbacks suppressed [ 28.704082] audit: type=1800 audit(1544110474.771:29): pid=5866 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 [ 28.731101] audit: type=1800 audit(1544110474.771:30): pid=5866 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 '10.128.10.26' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.931981] WARNING: CPU: 1 PID: 6020 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 38.940316] Kernel panic - not syncing: panic_on_warn set ... [ 38.946195] CPU: 1 PID: 6020 Comm: syz-executor552 Not tainted 4.20.0-rc5+ #364 [ 38.953622] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.962958] Call Trace: [ 38.965538] dump_stack+0x244/0x39d [ 38.969152] ? dump_stack_print_info.cold.1+0x20/0x20 [ 38.974330] panic+0x2ad/0x55c [ 38.977510] ? add_taint.cold.5+0x16/0x16 [ 38.981643] ? __warn.cold.8+0x5/0x45 [ 38.985427] ? __warn+0xe8/0x1d0 [ 38.988778] ? alloc_pages_vma+0x1bd/0x4a0 [ 38.993011] __warn.cold.8+0x20/0x45 [ 38.996706] ? rcu_softirq_qs+0x20/0x20 [ 39.000663] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.004884] report_bug+0x254/0x2d0 [ 39.008497] do_error_trap+0x11b/0x200 [ 39.012376] do_invalid_op+0x36/0x40 [ 39.016075] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.020293] invalid_op+0x14/0x20 [ 39.023732] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 39.028559] 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 [ 39.047442] RSP: 0018:ffff8881c1df7188 EFLAGS: 00010293 [ 39.052786] RAX: ffff8881c34a26c0 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 39.060038] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 39.067291] RBP: ffff8881c1df71c8 R08: ffff8881c34a26c0 R09: ffffed103b5e5b5f [ 39.074542] R10: 0000000000000002 R11: ffff8881daf2dafb R12: 0000000000040000 [ 39.081791] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 39.089054] ? alloc_pages_vma+0x1af/0x4a0 [ 39.093273] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.097507] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.101736] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 39.106833] ? mark_held_locks+0x130/0x130 [ 39.111059] ? __thp_get_unmapped_area+0x180/0x180 [ 39.115978] ? ptep_set_access_flags+0x1a0/0x1a0 [ 39.120715] ? print_usage_bug+0xc0/0xc0 [ 39.124757] ? print_usage_bug+0xc0/0xc0 [ 39.128803] ? print_usage_bug+0xc0/0xc0 [ 39.132853] ? touch_pmd+0x71/0xa0 [ 39.136379] ? kasan_check_write+0x14/0x20 [ 39.140599] ? follow_trans_huge_pmd+0x6c1/0x11a0 [ 39.145430] ? huge_pmd_set_accessed+0x4b0/0x4b0 [ 39.150172] ? __lock_acquire+0x62f/0x4c20 [ 39.154394] ? __lock_acquire+0x62f/0x4c20 [ 39.158627] ? mark_held_locks+0x130/0x130 [ 39.162861] ? mark_held_locks+0x130/0x130 [ 39.167079] ? mark_held_locks+0x130/0x130 [ 39.171300] ? follow_page_mask+0x1bda/0x2160 [ 39.175784] __handle_mm_fault+0x3c91/0x5be0 [ 39.180192] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 39.185023] ? pmd_huge+0x140/0x140 [ 39.188638] ? print_usage_bug+0xc0/0xc0 [ 39.192689] ? _raw_spin_unlock+0x2c/0x50 [ 39.196829] ? follow_page_mask+0x18e/0x2160 [ 39.201228] ? zap_class+0x640/0x640 [ 39.204926] ? zap_class+0x640/0x640 [ 39.208642] ? find_held_lock+0x36/0x1c0 [ 39.212696] ? handle_mm_fault+0x42a/0xc70 [ 39.216917] ? lock_downgrade+0x900/0x900 [ 39.221051] ? check_preemption_disabled+0x48/0x280 [ 39.226057] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 39.230975] ? kasan_check_read+0x11/0x20 [ 39.235126] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 39.240391] ? rcu_softirq_qs+0x20/0x20 [ 39.244354] ? trace_hardirqs_off_caller+0x310/0x310 [ 39.249444] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 39.255133] ? check_preemption_disabled+0x48/0x280 [ 39.260142] handle_mm_fault+0x54f/0xc70 [ 39.264193] ? __handle_mm_fault+0x5be0/0x5be0 [ 39.268763] ? find_vma+0x34/0x190 [ 39.272300] __do_page_fault+0x5e8/0xe60 [ 39.276388] do_page_fault+0xf2/0x7e0 [ 39.280172] ? vmalloc_sync_all+0x30/0x30 [ 39.284306] ? error_entry+0x76/0xd0 [ 39.288005] ? trace_hardirqs_off_caller+0xbb/0x310 [ 39.293005] ? find_held_lock+0x36/0x1c0 [ 39.297052] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.301882] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.306909] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.311743] page_fault+0x1e/0x30 [ 39.315183] RIP: 0010:__clear_user+0x3b/0x70 [ 39.319575] 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 [ 39.338466] RSP: 0018:ffff8881c1df7bc8 EFLAGS: 00010206 [ 39.343826] RAX: 0000000000000000 RBX: 000000000000000f RCX: 000000000000000f [ 39.351090] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8008 [ 39.358357] RBP: ffff8881c1df7bd8 R08: 1ffff110383bef55 R09: 0000000000000008 [ 39.365622] R10: 0000000000000001 R11: ffff8881c34a26c0 R12: 00000000203e8008 [ 39.372883] R13: 00000000203e8008 R14: 00007ffffffff000 R15: 0000000000000000 [ 39.380162] ? __might_fault+0x1a3/0x1e0 [ 39.384233] ? __clear_user+0x23/0x70 [ 39.388024] clear_user+0xb1/0xe0 [ 39.391916] kernel_get_mempolicy+0x292/0x1100 [ 39.396494] ? sp_free+0x60/0x60 [ 39.399854] ? __mpol_equal+0x370/0x370 [ 39.403818] ? up_read+0x225/0x2c0 [ 39.407357] ? up_read_non_owner+0x100/0x100 [ 39.411773] ? do_syscall_64+0x9a/0x820 [ 39.415737] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 39.420310] ? trace_hardirqs_on+0xbd/0x310 [ 39.424616] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.429966] ? trace_hardirqs_off_caller+0x310/0x310 [ 39.435060] __x64_sys_get_mempolicy+0xbe/0x150 [ 39.439720] do_syscall_64+0x1b9/0x820 [ 39.443604] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.448956] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.453873] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.458706] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.463712] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.468716] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.473725] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.478560] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.483735] RIP: 0033:0x440009 [ 39.486918] 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 [ 39.505810] RSP: 002b:00007ffefe47e128 EFLAGS: 00000217 ORIG_RAX: 00000000000000ef [ 39.513521] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 39.520787] RDX: 0000000000000401 RSI: 00000000203e8000 RDI: 0000000000000000 [ 39.528050] RBP: 00000000006ca018 R08: 0000000000000003 R09: 0000000000000000 [ 39.535308] R10: 00000000208d3000 R11: 0000000000000217 R12: 0000000000401890 [ 39.542567] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 39.550978] Kernel Offset: disabled [ 39.554679] Rebooting in 86400 seconds..