[....] 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. [ 29.593108] kauditd_printk_skb: 7 callbacks suppressed [ 29.593121] audit: type=1800 audit(1544126188.537:29): pid=5918 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.619010] audit: type=1800 audit(1544126188.537:30): pid=5918 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: [ 34.359491] sshd (6055) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.10.59' (ECDSA) to the list of known hosts. executing program [ 50.484723] WARNING: CPU: 0 PID: 6072 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 50.493083] Kernel panic - not syncing: panic_on_warn set ... [ 50.498969] CPU: 0 PID: 6072 Comm: syz-executor007 Not tainted 4.20.0-rc5+ #143 [ 50.506394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.515726] Call Trace: [ 50.518300] dump_stack+0x244/0x39d [ 50.521915] ? dump_stack_print_info.cold.1+0x20/0x20 [ 50.527109] panic+0x2ad/0x55c [ 50.530284] ? add_taint.cold.5+0x16/0x16 [ 50.534413] ? __warn.cold.8+0x5/0x45 [ 50.538206] ? __warn+0xe8/0x1d0 [ 50.541571] ? alloc_pages_vma+0x1bd/0x4a0 [ 50.545786] __warn.cold.8+0x20/0x45 [ 50.549483] ? rcu_softirq_qs+0x20/0x20 [ 50.553435] ? alloc_pages_vma+0x1bd/0x4a0 [ 50.557648] report_bug+0x254/0x2d0 [ 50.561258] do_error_trap+0x11b/0x200 [ 50.565124] do_invalid_op+0x36/0x40 [ 50.568816] ? alloc_pages_vma+0x1bd/0x4a0 [ 50.573037] invalid_op+0x14/0x20 [ 50.576476] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 50.581298] 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 [ 50.600185] RSP: 0018:ffff8881beb4f188 EFLAGS: 00010293 [ 50.605529] RAX: ffff8881c1a38540 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 50.612778] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 50.620027] RBP: ffff8881beb4f1c8 R08: ffff8881c1a38540 R09: ffffed103b5c5b5f [ 50.627462] R10: 0000000000000002 R11: ffff8881dae2dafb R12: 0000000000040000 [ 50.634719] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 50.642100] ? alloc_pages_vma+0x1af/0x4a0 [ 50.646321] ? alloc_pages_vma+0x1bd/0x4a0 [ 50.650545] ? alloc_pages_vma+0x1bd/0x4a0 [ 50.654767] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 50.659930] ? __thp_get_unmapped_area+0x180/0x180 [ 50.664849] ? __lock_acquire+0x62f/0x4c20 [ 50.669075] ? print_usage_bug+0xc0/0xc0 [ 50.673122] ? print_usage_bug+0xc0/0xc0 [ 50.677163] ? print_usage_bug+0xc0/0xc0 [ 50.681210] ? __lock_acquire+0x62f/0x4c20 [ 50.685561] ? mark_held_locks+0x130/0x130 [ 50.689780] ? print_usage_bug+0xc0/0xc0 [ 50.693903] ? __lock_acquire+0x62f/0x4c20 [ 50.698133] ? __lock_acquire+0x62f/0x4c20 [ 50.702363] ? mark_held_locks+0x130/0x130 [ 50.706603] ? mark_held_locks+0x130/0x130 [ 50.710829] ? mark_held_locks+0x130/0x130 [ 50.715063] ? __lock_acquire+0x62f/0x4c20 [ 50.719287] __handle_mm_fault+0x3c91/0x5be0 [ 50.723679] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 50.728522] ? print_usage_bug+0xc0/0xc0 [ 50.732561] ? __lock_acquire+0x62f/0x4c20 [ 50.736774] ? zap_class+0x640/0x640 [ 50.740476] ? is_bpf_text_address+0xac/0x170 [ 50.744958] ? zap_class+0x640/0x640 [ 50.748658] ? zap_class+0x640/0x640 [ 50.752356] ? find_held_lock+0x36/0x1c0 [ 50.756403] ? handle_mm_fault+0x42a/0xc70 [ 50.760620] ? lock_downgrade+0x900/0x900 [ 50.764748] ? check_preemption_disabled+0x48/0x280 [ 50.769749] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 50.774659] ? kasan_check_read+0x11/0x20 [ 50.778787] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 50.784068] ? rcu_softirq_qs+0x20/0x20 [ 50.788027] ? trace_hardirqs_off_caller+0x310/0x310 [ 50.793114] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.798634] ? check_preemption_disabled+0x48/0x280 [ 50.803649] handle_mm_fault+0x54f/0xc70 [ 50.807688] ? __handle_mm_fault+0x5be0/0x5be0 [ 50.812256] ? find_vma+0x34/0x190 [ 50.815781] __do_page_fault+0x5e8/0xe60 [ 50.819833] do_page_fault+0xf2/0x7e0 [ 50.823613] ? vmalloc_sync_all+0x30/0x30 [ 50.827740] ? error_entry+0x76/0xd0 [ 50.831463] ? trace_hardirqs_off_caller+0xbb/0x310 [ 50.836463] ? find_held_lock+0x36/0x1c0 [ 50.840512] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.845335] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.850357] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.855209] page_fault+0x1e/0x30 [ 50.858664] RIP: 0010:__clear_user+0x3b/0x70 [ 50.863080] 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 [ 50.882250] RSP: 0018:ffff8881beb4fbc8 EFLAGS: 00010206 [ 50.887612] RAX: 0000000000000000 RBX: 000000000000000f RCX: 000000000000000f [ 50.894864] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8008 [ 50.902114] RBP: ffff8881beb4fbd8 R08: 1ffff11037d69f55 R09: 0000000000000008 [ 50.909366] R10: 0000000000000001 R11: ffff8881c1a38540 R12: 00000000203e8008 [ 50.916631] R13: 00000000203e8008 R14: 00007ffffffff000 R15: 0000000000000000 [ 50.923891] ? __might_fault+0x1a3/0x1e0 [ 50.927938] ? __clear_user+0x23/0x70 [ 50.931722] clear_user+0xb1/0xe0 [ 50.935161] kernel_get_mempolicy+0x292/0x1100 [ 50.939732] ? sp_free+0x60/0x60 [ 50.943085] ? __mpol_equal+0x370/0x370 [ 50.947039] ? up_read+0x225/0x2c0 [ 50.950567] ? up_read_non_owner+0x100/0x100 [ 50.954960] ? do_syscall_64+0x9a/0x820 [ 50.958936] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 50.963498] ? trace_hardirqs_on+0xbd/0x310 [ 50.967798] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.973142] ? trace_hardirqs_off_caller+0x310/0x310 [ 50.978328] __x64_sys_get_mempolicy+0xbe/0x150 [ 50.983001] do_syscall_64+0x1b9/0x820 [ 50.986870] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.992222] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.997131] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.001956] ? trace_hardirqs_on_caller+0x310/0x310 [ 51.006970] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 51.011971] ? prepare_exit_to_usermode+0x291/0x3b0 [ 51.016969] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.021798] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.026964] RIP: 0033:0x440009 [ 51.030156] 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 [ 51.049039] RSP: 002b:00007ffda57450a8 EFLAGS: 00000217 ORIG_RAX: 00000000000000ef [ 51.056731] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 51.063977] RDX: 0000000000000401 RSI: 00000000203e8000 RDI: 0000000000000000 [ 51.071226] RBP: 00000000006ca018 R08: 0000000000000002 R09: 0000000000000000 [ 51.078574] R10: 0000000020336000 R11: 0000000000000217 R12: 0000000000401890 [ 51.085832] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 51.094188] Kernel Offset: disabled [ 51.097866] Rebooting in 86400 seconds..