[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining dae[ 33.791623] audit: type=1800 audit(1544108237.942:33): pid=6038 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 mon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 33.822366] audit: type=1800 audit(1544108237.942:34): pid=6038 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.192588] audit: type=1400 audit(1544108241.342:35): avc: denied { map } for pid=6213 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. executing program [ 44.146418] audit: type=1400 audit(1544108248.292:36): avc: denied { map } for pid=6227 comm="syz-executor740" path="/root/syz-executor740226253" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 44.151063] WARNING: CPU: 1 PID: 6227 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 44.181035] Kernel panic - not syncing: panic_on_warn set ... [ 44.186907] CPU: 1 PID: 6227 Comm: syz-executor740 Not tainted 4.20.0-rc5+ #144 [ 44.194334] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.203671] Call Trace: [ 44.206246] dump_stack+0x244/0x39d [ 44.209890] ? dump_stack_print_info.cold.1+0x20/0x20 [ 44.215068] panic+0x2ad/0x55c [ 44.218242] ? add_taint.cold.5+0x16/0x16 [ 44.222375] ? __warn.cold.8+0x5/0x45 [ 44.226163] ? __warn+0xe8/0x1d0 [ 44.229531] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.233752] __warn.cold.8+0x20/0x45 [ 44.237447] ? rcu_softirq_qs+0x20/0x20 [ 44.241410] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.245629] report_bug+0x254/0x2d0 [ 44.249346] do_error_trap+0x11b/0x200 [ 44.253221] do_invalid_op+0x36/0x40 [ 44.256934] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.261153] invalid_op+0x14/0x20 [ 44.264595] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 44.269422] 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 [ 44.288308] RSP: 0018:ffff8881c90bf188 EFLAGS: 00010293 [ 44.293652] RAX: ffff8881ce49c440 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 44.300909] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 44.308158] RBP: ffff8881c90bf1c8 R08: ffff8881ce49c440 R09: ffffed103b5e5b5f [ 44.315419] R10: 0000000000000002 R11: ffff8881daf2dafb R12: 0000000000040000 [ 44.322690] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 44.329953] ? alloc_pages_vma+0x1af/0x4a0 [ 44.334174] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.338390] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.342619] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 44.347863] ? mark_held_locks+0x130/0x130 [ 44.352088] ? __thp_get_unmapped_area+0x180/0x180 [ 44.357006] ? ptep_set_access_flags+0x1a0/0x1a0 [ 44.361748] ? print_usage_bug+0xc0/0xc0 [ 44.365789] ? rcu_note_context_switch+0x12ad/0x2150 [ 44.371116] ? print_usage_bug+0xc0/0xc0 [ 44.375163] ? print_usage_bug+0xc0/0xc0 [ 44.379211] ? touch_pmd+0x71/0xa0 [ 44.382736] ? kasan_check_write+0x14/0x20 [ 44.386961] ? follow_trans_huge_pmd+0x6c1/0x11a0 [ 44.391804] ? huge_pmd_set_accessed+0x4b0/0x4b0 [ 44.396547] ? __lock_acquire+0x62f/0x4c20 [ 44.400770] ? __lock_acquire+0x62f/0x4c20 [ 44.404990] ? mark_held_locks+0x130/0x130 [ 44.409214] ? mark_held_locks+0x130/0x130 [ 44.413436] ? mark_held_locks+0x130/0x130 [ 44.417663] ? follow_page_mask+0x1bda/0x2160 [ 44.422167] __handle_mm_fault+0x3c91/0x5be0 [ 44.426584] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 44.431416] ? pmd_huge+0x140/0x140 [ 44.435027] ? print_usage_bug+0xc0/0xc0 [ 44.439073] ? _raw_spin_unlock+0x2c/0x50 [ 44.443204] ? follow_page_mask+0x18e/0x2160 [ 44.447600] ? zap_class+0x640/0x640 [ 44.451309] ? zap_class+0x640/0x640 [ 44.455027] ? find_held_lock+0x36/0x1c0 [ 44.459074] ? handle_mm_fault+0x42a/0xc70 [ 44.463309] ? lock_downgrade+0x900/0x900 [ 44.467445] ? check_preemption_disabled+0x48/0x280 [ 44.472454] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 44.477380] ? kasan_check_read+0x11/0x20 [ 44.481532] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 44.487117] ? rcu_softirq_qs+0x20/0x20 [ 44.491081] ? trace_hardirqs_off_caller+0x310/0x310 [ 44.496196] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 44.501725] ? check_preemption_disabled+0x48/0x280 [ 44.506744] handle_mm_fault+0x54f/0xc70 [ 44.510809] ? __handle_mm_fault+0x5be0/0x5be0 [ 44.515376] ? find_vma+0x34/0x190 [ 44.518922] __do_page_fault+0x5e8/0xe60 [ 44.522974] do_page_fault+0xf2/0x7e0 [ 44.526757] ? vmalloc_sync_all+0x30/0x30 [ 44.530889] ? error_entry+0x76/0xd0 [ 44.534589] ? trace_hardirqs_off_caller+0xbb/0x310 [ 44.539589] ? find_held_lock+0x36/0x1c0 [ 44.543633] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.548460] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.553468] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.558295] page_fault+0x1e/0x30 [ 44.561732] RIP: 0010:__clear_user+0x3b/0x70 [ 44.566165] 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 [ 44.585054] RSP: 0018:ffff8881c90bfbc8 EFLAGS: 00010206 [ 44.590407] RAX: 0000000000000000 RBX: 000000000000000f RCX: 000000000000000f [ 44.597659] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8008 [ 44.604914] RBP: ffff8881c90bfbd8 R08: 1ffff11039217f55 R09: 0000000000000008 [ 44.612165] R10: 0000000000000001 R11: ffff8881ce49c440 R12: 00000000203e8008 [ 44.619438] R13: 00000000203e8008 R14: 00007ffffffff000 R15: 0000000000000000 [ 44.626702] ? __might_fault+0x1a3/0x1e0 [ 44.630769] ? __clear_user+0x23/0x70 [ 44.634554] clear_user+0xb1/0xe0 [ 44.637996] kernel_get_mempolicy+0x292/0x1100 [ 44.642566] ? sp_free+0x60/0x60 [ 44.645917] ? __mpol_equal+0x370/0x370 [ 44.649881] ? up_read+0x225/0x2c0 [ 44.653414] ? up_read_non_owner+0x100/0x100 [ 44.657809] ? do_syscall_64+0x9a/0x820 [ 44.661767] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 44.666335] ? trace_hardirqs_on+0xbd/0x310 [ 44.670645] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.676010] ? trace_hardirqs_off_caller+0x310/0x310 [ 44.681153] __x64_sys_get_mempolicy+0xbe/0x150 [ 44.685825] do_syscall_64+0x1b9/0x820 [ 44.689696] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.695045] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.699959] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.704787] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.709801] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.714831] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.719854] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.724721] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.729906] RIP: 0033:0x440009 [ 44.733110] 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 [ 44.751994] RSP: 002b:00007ffe10822dc8 EFLAGS: 00000217 ORIG_RAX: 00000000000000ef [ 44.759684] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 44.766933] RDX: 0000000000000401 RSI: 00000000203e8000 RDI: 0000000000000000 [ 44.774188] RBP: 00000000006ca018 R08: 0000000000000003 R09: 0000000000000000 [ 44.781448] R10: 00000000208d3000 R11: 0000000000000217 R12: 0000000000401890 [ 44.788704] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 44.797082] Kernel Offset: disabled [ 44.800779] Rebooting in 86400 seconds..