[....] 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. [ 28.938102] kauditd_printk_skb: 8 callbacks suppressed [ 28.938115] audit: type=1800 audit(1544118450.997:29): pid=5899 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 [ 28.964495] audit: type=1800 audit(1544118450.997:30): pid=5899 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 syzkaller login: [ 32.646751] sshd (6038) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.15.214' (ECDSA) to the list of known hosts. executing program [ 39.141818] WARNING: CPU: 0 PID: 6054 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 39.150144] Kernel panic - not syncing: panic_on_warn set ... [ 39.156017] CPU: 0 PID: 6054 Comm: syz-executor672 Not tainted 4.20.0-rc5+ #364 [ 39.163443] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.172793] Call Trace: [ 39.175373] dump_stack+0x244/0x39d [ 39.178988] ? dump_stack_print_info.cold.1+0x20/0x20 [ 39.184167] panic+0x2ad/0x55c [ 39.187346] ? add_taint.cold.5+0x16/0x16 [ 39.191477] ? __warn.cold.8+0x5/0x45 [ 39.195291] ? __warn+0xe8/0x1d0 [ 39.198643] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.202859] __warn.cold.8+0x20/0x45 [ 39.206700] ? rcu_softirq_qs+0x20/0x20 [ 39.210658] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.214878] report_bug+0x254/0x2d0 [ 39.218491] do_error_trap+0x11b/0x200 [ 39.222365] do_invalid_op+0x36/0x40 [ 39.226061] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.230283] invalid_op+0x14/0x20 [ 39.233721] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 39.238555] 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 [ 39.257444] RSP: 0018:ffff8881c0a1f188 EFLAGS: 00010293 [ 39.262793] RAX: ffff8881c0958580 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 39.270068] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 39.277324] RBP: ffff8881c0a1f1c8 R08: ffff8881c0958580 R09: ffffed103b5c5b5f [ 39.284760] R10: 0000000000000002 R11: ffff8881dae2dafb R12: 0000000000040000 [ 39.292012] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 39.299273] ? alloc_pages_vma+0x1af/0x4a0 [ 39.303491] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.307709] ? alloc_pages_vma+0x1bd/0x4a0 [ 39.311931] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 39.317033] ? __thp_get_unmapped_area+0x180/0x180 [ 39.321966] ? __lock_acquire+0x62f/0x4c20 [ 39.326186] ? print_usage_bug+0xc0/0xc0 [ 39.330256] ? print_usage_bug+0xc0/0xc0 [ 39.334301] ? print_usage_bug+0xc0/0xc0 [ 39.338349] ? __lock_acquire+0x62f/0x4c20 [ 39.342592] ? mark_held_locks+0x130/0x130 [ 39.346813] ? print_usage_bug+0xc0/0xc0 [ 39.350917] ? __lock_acquire+0x62f/0x4c20 [ 39.355142] ? __lock_acquire+0x62f/0x4c20 [ 39.359373] ? mark_held_locks+0x130/0x130 [ 39.363605] ? mark_held_locks+0x130/0x130 [ 39.367835] ? mark_held_locks+0x130/0x130 [ 39.372068] ? __lock_acquire+0x62f/0x4c20 [ 39.376304] __handle_mm_fault+0x3c91/0x5be0 [ 39.380700] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 39.385527] ? print_usage_bug+0xc0/0xc0 [ 39.389577] ? __lock_acquire+0x62f/0x4c20 [ 39.393797] ? zap_class+0x640/0x640 [ 39.397510] ? is_bpf_text_address+0xac/0x170 [ 39.401995] ? zap_class+0x640/0x640 [ 39.405692] ? zap_class+0x640/0x640 [ 39.409392] ? find_held_lock+0x36/0x1c0 [ 39.413442] ? handle_mm_fault+0x42a/0xc70 [ 39.417674] ? lock_downgrade+0x900/0x900 [ 39.421805] ? check_preemption_disabled+0x48/0x280 [ 39.426822] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 39.431737] ? kasan_check_read+0x11/0x20 [ 39.435867] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 39.441126] ? rcu_softirq_qs+0x20/0x20 [ 39.445090] ? trace_hardirqs_off_caller+0x310/0x310 [ 39.450199] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 39.455730] ? check_preemption_disabled+0x48/0x280 [ 39.460735] handle_mm_fault+0x54f/0xc70 [ 39.464790] ? __handle_mm_fault+0x5be0/0x5be0 [ 39.469360] ? find_vma+0x34/0x190 [ 39.472883] __do_page_fault+0x5e8/0xe60 [ 39.476934] do_page_fault+0xf2/0x7e0 [ 39.480716] ? vmalloc_sync_all+0x30/0x30 [ 39.484853] ? error_entry+0x76/0xd0 [ 39.488555] ? trace_hardirqs_off_caller+0xbb/0x310 [ 39.493560] ? find_held_lock+0x36/0x1c0 [ 39.497639] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.502461] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.507468] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.512296] page_fault+0x1e/0x30 [ 39.515731] RIP: 0010:__clear_user+0x3b/0x70 [ 39.520127] 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 [ 39.539026] RSP: 0018:ffff8881c0a1fbc8 EFLAGS: 00010206 [ 39.544386] RAX: 0000000000000000 RBX: 000000000000000f RCX: 000000000000000f [ 39.551636] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8008 [ 39.558891] RBP: ffff8881c0a1fbd8 R08: 1ffff11038143f55 R09: 0000000000000008 [ 39.566146] R10: 0000000000000001 R11: ffff8881c0958580 R12: 00000000203e8008 [ 39.573401] R13: 00000000203e8008 R14: 00007ffffffff000 R15: 0000000000000000 [ 39.580663] ? __might_fault+0x1a3/0x1e0 [ 39.584713] ? __clear_user+0x23/0x70 [ 39.588496] clear_user+0xb1/0xe0 [ 39.591936] kernel_get_mempolicy+0x292/0x1100 [ 39.596584] ? sp_free+0x60/0x60 [ 39.599956] ? __mpol_equal+0x370/0x370 [ 39.603918] ? up_read+0x77/0x2c0 [ 39.607353] ? up_read_non_owner+0x100/0x100 [ 39.611847] ? do_syscall_64+0x9a/0x820 [ 39.615812] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 39.620377] ? trace_hardirqs_on+0xbd/0x310 [ 39.624685] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.630056] ? trace_hardirqs_off_caller+0x310/0x310 [ 39.635167] __x64_sys_get_mempolicy+0xbe/0x150 [ 39.639826] do_syscall_64+0x1b9/0x820 [ 39.643699] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.649068] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.653981] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.658810] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.663815] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.668819] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.673824] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.678655] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.683827] RIP: 0033:0x440009 [ 39.687004] 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 [ 39.705891] RSP: 002b:00007ffeceeb5e08 EFLAGS: 00000217 ORIG_RAX: 00000000000000ef [ 39.713583] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 39.720835] RDX: 0000000000000401 RSI: 00000000203e8000 RDI: 0000000000000000 [ 39.728086] RBP: 00000000006ca018 R08: 0000000000000002 R09: 0000000000000000 [ 39.735341] R10: 0000000020336000 R11: 0000000000000217 R12: 0000000000401890 [ 39.742591] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 39.750874] Kernel Offset: disabled [ 39.754565] Rebooting in 86400 seconds..