[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 29.434632] kauditd_printk_skb: 7 callbacks suppressed [ 29.434644] audit: type=1800 audit(1544131100.199:29): pid=5872 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 [ 29.461111] audit: type=1800 audit(1544131100.199:30): pid=5872 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 '10.128.10.11' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.905370] WARNING: CPU: 1 PID: 6026 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 36.913730] Kernel panic - not syncing: panic_on_warn set ... [ 36.919608] CPU: 1 PID: 6026 Comm: syz-executor743 Not tainted 4.20.0-rc5+ #267 [ 36.927057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.936400] Call Trace: [ 36.938986] dump_stack+0x244/0x39d [ 36.942602] ? dump_stack_print_info.cold.1+0x20/0x20 [ 36.947788] panic+0x2ad/0x55c [ 36.951004] ? add_taint.cold.5+0x16/0x16 [ 36.955144] ? __warn.cold.8+0x5/0x45 [ 36.958926] ? __warn+0xe8/0x1d0 [ 36.962281] ? alloc_pages_vma+0x1bd/0x4a0 [ 36.966510] __warn.cold.8+0x20/0x45 [ 36.970207] ? rcu_softirq_qs+0x20/0x20 [ 36.974197] ? alloc_pages_vma+0x1bd/0x4a0 [ 36.978420] report_bug+0x254/0x2d0 [ 36.982033] do_error_trap+0x11b/0x200 [ 36.985906] do_invalid_op+0x36/0x40 [ 36.989622] ? alloc_pages_vma+0x1bd/0x4a0 [ 36.993855] invalid_op+0x14/0x20 [ 36.997301] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 37.002145] 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 [ 37.021032] RSP: 0018:ffff8881c1ef7298 EFLAGS: 00010293 [ 37.026378] RAX: ffff8881d2edc240 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 37.033642] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 37.040894] RBP: ffff8881c1ef72d8 R08: ffff8881d2edc240 R09: ffffed103b5e5b5f [ 37.048149] R10: 0000000000000002 R11: ffff8881daf2dafb R12: 0000000000040000 [ 37.055407] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 37.062668] ? alloc_pages_vma+0x1af/0x4a0 [ 37.066900] ? alloc_pages_vma+0x1bd/0x4a0 [ 37.071147] ? alloc_pages_vma+0x1bd/0x4a0 [ 37.075374] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 37.080477] ? print_usage_bug+0xc0/0xc0 [ 37.084544] ? __thp_get_unmapped_area+0x180/0x180 [ 37.089461] ? mark_held_locks+0x130/0x130 [ 37.093683] ? print_usage_bug+0xc0/0xc0 [ 37.097733] ? print_usage_bug+0xc0/0xc0 [ 37.101819] ? mark_held_locks+0x130/0x130 [ 37.106039] ? print_usage_bug+0xc0/0xc0 [ 37.110094] ? __lock_acquire+0x62f/0x4c20 [ 37.114319] ? __lock_acquire+0x62f/0x4c20 [ 37.118538] ? print_usage_bug+0xc0/0xc0 [ 37.122588] ? print_usage_bug+0xc0/0xc0 [ 37.126642] ? mark_held_locks+0x130/0x130 [ 37.130861] ? mark_held_locks+0x130/0x130 [ 37.135096] ? zap_class+0x640/0x640 [ 37.138796] ? is_bpf_text_address+0xac/0x170 [ 37.143286] __handle_mm_fault+0x3c91/0x5be0 [ 37.147719] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 37.152551] ? print_usage_bug+0xc0/0xc0 [ 37.156601] ? print_usage_bug+0xc0/0xc0 [ 37.160653] ? mark_held_locks+0x130/0x130 [ 37.164878] ? zap_class+0x640/0x640 [ 37.168576] ? zap_class+0x640/0x640 [ 37.172276] ? find_held_lock+0x36/0x1c0 [ 37.176340] ? handle_mm_fault+0x42a/0xc70 [ 37.180576] ? lock_downgrade+0x900/0x900 [ 37.184709] ? check_preemption_disabled+0x48/0x280 [ 37.189713] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 37.194626] ? kasan_check_read+0x11/0x20 [ 37.198766] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 37.204029] ? rcu_softirq_qs+0x20/0x20 [ 37.208056] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.213146] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.218757] ? check_preemption_disabled+0x48/0x280 [ 37.223761] handle_mm_fault+0x54f/0xc70 [ 37.227815] ? __handle_mm_fault+0x5be0/0x5be0 [ 37.232387] ? find_vma+0x34/0x190 [ 37.235916] __do_page_fault+0x5e8/0xe60 [ 37.239983] do_page_fault+0xf2/0x7e0 [ 37.243791] ? vmalloc_sync_all+0x30/0x30 [ 37.247933] ? error_entry+0x76/0xd0 [ 37.251634] ? trace_hardirqs_off_caller+0xbb/0x310 [ 37.256634] ? find_held_lock+0x36/0x1c0 [ 37.260681] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.265509] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.270510] ? __might_fault+0x12b/0x1e0 [ 37.274557] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.279402] page_fault+0x1e/0x30 [ 37.282840] RIP: 0010:__clear_user+0x3b/0x70 [ 37.287255] 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 [ 37.306140] RSP: 0018:ffff8881c1ef7cd0 EFLAGS: 00010202 [ 37.311487] RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000010 [ 37.318760] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8000 [ 37.326033] RBP: ffff8881c1ef7ce0 R08: 1ffff110383def76 R09: 0000000000000008 [ 37.333293] R10: 0000000000000001 R11: ffff8881d2edc240 R12: 00000000203e8000 [ 37.340551] R13: 00000000203e8000 R14: 00007ffffffff000 R15: 0000000000000000 [ 37.347836] ? __might_fault+0x1a3/0x1e0 [ 37.351884] clear_user+0xb1/0xe0 [ 37.355331] __ia32_compat_sys_get_mempolicy+0x204/0x2e0 [ 37.360765] ? __ia32_sys_get_mempolicy+0x140/0x140 [ 37.365768] ? __ia32_sys_mbind+0xdd/0x1a0 [ 37.369999] do_fast_syscall_32+0x34d/0xfb2 [ 37.374313] ? do_int80_syscall_32+0x890/0x890 [ 37.378883] ? entry_SYSENTER_compat+0x68/0x7f [ 37.383452] ? trace_hardirqs_off_caller+0xbb/0x310 [ 37.388451] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.393365] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.398191] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.403021] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.408042] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.413057] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.418061] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.422894] entry_SYSENTER_compat+0x70/0x7f [ 37.427317] RIP: 0023:0xf7f71a29 [ 37.430672] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 37.449557] RSP: 002b:00000000fffd932c EFLAGS: 00000282 ORIG_RAX: 0000000000000113 [ 37.457249] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000203e8000 [ 37.464504] RDX: 0000000000000401 RSI: 0000000020336000 RDI: 0000000000000002 [ 37.471762] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 37.479028] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 37.486317] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 37.494735] Kernel Offset: disabled [ 37.498441] Rebooting in 86400 seconds..