[....] 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. [ 29.441855] kauditd_printk_skb: 7 callbacks suppressed [ 29.441868] audit: type=1800 audit(1544114477.248:29): pid=5889 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.467731] audit: type=1800 audit(1544114477.248:30): pid=5889 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.580969] sshd (6027) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. executing program [ 44.436220] WARNING: CPU: 0 PID: 6044 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 44.444616] Kernel panic - not syncing: panic_on_warn set ... [ 44.450607] CPU: 0 PID: 6044 Comm: syz-executor987 Not tainted 4.20.0-rc5+ #143 [ 44.458036] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.467387] Call Trace: [ 44.469976] dump_stack+0x244/0x39d [ 44.473598] ? dump_stack_print_info.cold.1+0x20/0x20 [ 44.478800] panic+0x2ad/0x55c [ 44.481977] ? add_taint.cold.5+0x16/0x16 [ 44.486111] ? __warn.cold.8+0x5/0x45 [ 44.489892] ? __warn+0xe8/0x1d0 [ 44.493241] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.497529] __warn.cold.8+0x20/0x45 [ 44.501239] ? rcu_softirq_qs+0x20/0x20 [ 44.505192] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.509410] report_bug+0x254/0x2d0 [ 44.513021] do_error_trap+0x11b/0x200 [ 44.516897] do_invalid_op+0x36/0x40 [ 44.520607] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.524839] invalid_op+0x14/0x20 [ 44.528279] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 44.533104] 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 [ 44.551989] RSP: 0018:ffff8881c025f188 EFLAGS: 00010293 [ 44.557335] RAX: ffff8881c032e2c0 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 44.564681] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 44.572062] RBP: ffff8881c025f1c8 R08: ffff8881c032e2c0 R09: ffffed103b5c5b5f [ 44.579319] R10: 0000000000000002 R11: ffff8881dae2dafb R12: 0000000000040000 [ 44.586572] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 44.593844] ? alloc_pages_vma+0x1af/0x4a0 [ 44.598064] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.602285] ? alloc_pages_vma+0x1bd/0x4a0 [ 44.606512] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 44.611631] ? mark_held_locks+0x130/0x130 [ 44.615850] ? __thp_get_unmapped_area+0x180/0x180 [ 44.620768] ? ptep_set_access_flags+0x1a0/0x1a0 [ 44.625505] ? print_usage_bug+0xc0/0xc0 [ 44.629634] ? print_usage_bug+0xc0/0xc0 [ 44.633685] ? print_usage_bug+0xc0/0xc0 [ 44.637735] ? touch_pmd+0x71/0xa0 [ 44.641343] ? kasan_check_write+0x14/0x20 [ 44.645589] ? follow_trans_huge_pmd+0x6c1/0x11a0 [ 44.650419] ? huge_pmd_set_accessed+0x4b0/0x4b0 [ 44.655159] ? __lock_acquire+0x62f/0x4c20 [ 44.659379] ? __lock_acquire+0x62f/0x4c20 [ 44.663600] ? mark_held_locks+0x130/0x130 [ 44.667823] ? mark_held_locks+0x130/0x130 [ 44.672043] ? mark_held_locks+0x130/0x130 [ 44.676266] ? follow_page_mask+0x1bda/0x2160 [ 44.680753] __handle_mm_fault+0x3c91/0x5be0 [ 44.685146] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 44.689970] ? pmd_huge+0x140/0x140 [ 44.693590] ? print_usage_bug+0xc0/0xc0 [ 44.697639] ? _raw_spin_unlock+0x2c/0x50 [ 44.701769] ? follow_page_mask+0x18e/0x2160 [ 44.706164] ? zap_class+0x640/0x640 [ 44.709863] ? zap_class+0x640/0x640 [ 44.713561] ? find_held_lock+0x36/0x1c0 [ 44.717616] ? handle_mm_fault+0x42a/0xc70 [ 44.721833] ? lock_downgrade+0x900/0x900 [ 44.725974] ? check_preemption_disabled+0x48/0x280 [ 44.731010] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 44.735936] ? kasan_check_read+0x11/0x20 [ 44.740068] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 44.745329] ? rcu_softirq_qs+0x20/0x20 [ 44.749395] ? trace_hardirqs_off_caller+0x310/0x310 [ 44.754549] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 44.760119] ? check_preemption_disabled+0x48/0x280 [ 44.765122] handle_mm_fault+0x54f/0xc70 [ 44.769172] ? __handle_mm_fault+0x5be0/0x5be0 [ 44.773745] ? find_vma+0x34/0x190 [ 44.777272] __do_page_fault+0x5e8/0xe60 [ 44.781350] do_page_fault+0xf2/0x7e0 [ 44.785133] ? vmalloc_sync_all+0x30/0x30 [ 44.789264] ? error_entry+0x76/0xd0 [ 44.792958] ? trace_hardirqs_off_caller+0xbb/0x310 [ 44.797956] ? find_held_lock+0x36/0x1c0 [ 44.802001] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.806831] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.811836] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.816663] page_fault+0x1e/0x30 [ 44.820109] RIP: 0010:__clear_user+0x3b/0x70 [ 44.824500] 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 [ 44.843382] RSP: 0018:ffff8881c025fbc8 EFLAGS: 00010206 [ 44.848733] RAX: 0000000000000000 RBX: 000000000000000f RCX: 000000000000000f [ 44.855985] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8008 [ 44.863240] RBP: ffff8881c025fbd8 R08: 1ffff1103804bf55 R09: 0000000000000008 [ 44.870495] R10: 0000000000000001 R11: ffff8881c032e2c0 R12: 00000000203e8008 [ 44.877748] R13: 00000000203e8008 R14: 00007ffffffff000 R15: 0000000000000000 [ 44.885058] ? __might_fault+0x1a3/0x1e0 [ 44.889111] ? __clear_user+0x23/0x70 [ 44.892893] clear_user+0xb1/0xe0 [ 44.896351] kernel_get_mempolicy+0x292/0x1100 [ 44.901070] ? sp_free+0x60/0x60 [ 44.904426] ? __mpol_equal+0x370/0x370 [ 44.908385] ? up_read+0x225/0x2c0 [ 44.911923] ? up_read_non_owner+0x100/0x100 [ 44.916350] ? do_syscall_64+0x9a/0x820 [ 44.920328] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 44.924894] ? trace_hardirqs_on+0xbd/0x310 [ 44.929202] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.934548] ? trace_hardirqs_off_caller+0x310/0x310 [ 44.939640] __x64_sys_get_mempolicy+0xbe/0x150 [ 44.944297] do_syscall_64+0x1b9/0x820 [ 44.948167] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.953525] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.958474] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.963301] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.968333] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.973352] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.978356] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.983202] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.988386] RIP: 0033:0x440009 [ 44.991562] 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 [ 45.011550] RSP: 002b:00007ffc9bae3138 EFLAGS: 00000217 ORIG_RAX: 00000000000000ef [ 45.019247] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 45.026499] RDX: 0000000000000401 RSI: 00000000203e8000 RDI: 0000000000000000 [ 45.033831] RBP: 00000000006ca018 R08: 0000000000000003 R09: 0000000000000000 [ 45.041092] R10: 00000000208d3000 R11: 0000000000000217 R12: 0000000000401890 [ 45.048344] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 45.056674] Kernel Offset: disabled [ 45.060417] Rebooting in 86400 seconds..