[ 28.740021] audit: type=1800 audit(1544116061.071:28): pid=5896 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 29.112615] sshd (5963) used greatest stack depth: 15376 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.465894] audit: type=1800 audit(1544116061.921:29): pid=5896 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 [ 29.485468] audit: type=1800 audit(1544116061.921:30): pid=5896 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 '10.128.0.120' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.624210] WARNING: CPU: 1 PID: 6050 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 37.632765] Kernel panic - not syncing: panic_on_warn set ... [ 37.638636] CPU: 1 PID: 6050 Comm: syz-executor780 Not tainted 4.20.0-rc5+ #364 [ 37.646060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.655396] Call Trace: [ 37.657970] dump_stack+0x244/0x39d [ 37.661583] ? dump_stack_print_info.cold.1+0x20/0x20 [ 37.666762] panic+0x2ad/0x55c [ 37.669938] ? add_taint.cold.5+0x16/0x16 [ 37.674072] ? __warn.cold.8+0x5/0x45 [ 37.677867] ? __warn+0xe8/0x1d0 [ 37.681217] ? alloc_pages_vma+0x1bd/0x4a0 [ 37.685433] __warn.cold.8+0x20/0x45 [ 37.689128] ? rcu_softirq_qs+0x20/0x20 [ 37.693081] ? alloc_pages_vma+0x1bd/0x4a0 [ 37.697301] report_bug+0x254/0x2d0 [ 37.700917] do_error_trap+0x11b/0x200 [ 37.704789] do_invalid_op+0x36/0x40 [ 37.708484] ? alloc_pages_vma+0x1bd/0x4a0 [ 37.712702] invalid_op+0x14/0x20 [ 37.716136] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 37.720961] 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 [ 37.739842] RSP: 0018:ffff8881c1527188 EFLAGS: 00010293 [ 37.745185] RAX: ffff8881c151c700 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 37.752438] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 37.759690] RBP: ffff8881c15271c8 R08: ffff8881c151c700 R09: ffffed103b5e5b5f [ 37.766944] R10: 0000000000000002 R11: ffff8881daf2dafb R12: 0000000000040000 [ 37.774202] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 37.781469] ? alloc_pages_vma+0x1af/0x4a0 [ 37.785683] ? alloc_pages_vma+0x1bd/0x4a0 [ 37.789904] ? alloc_pages_vma+0x1bd/0x4a0 [ 37.794127] do_huge_pmd_anonymous_page+0x59e/0x2030 [ 37.799217] ? mark_held_locks+0x130/0x130 [ 37.803436] ? __thp_get_unmapped_area+0x180/0x180 [ 37.808390] ? ptep_set_access_flags+0x1a0/0x1a0 [ 37.813145] ? print_usage_bug+0xc0/0xc0 [ 37.817211] ? print_usage_bug+0xc0/0xc0 [ 37.821256] ? print_usage_bug+0xc0/0xc0 [ 37.825311] ? touch_pmd+0x71/0xa0 [ 37.828854] ? kasan_check_write+0x14/0x20 [ 37.833072] ? follow_trans_huge_pmd+0x6c1/0x11a0 [ 37.837899] ? huge_pmd_set_accessed+0x4b0/0x4b0 [ 37.842677] ? __lock_acquire+0x62f/0x4c20 [ 37.846898] ? __lock_acquire+0x62f/0x4c20 [ 37.851115] ? mark_held_locks+0x130/0x130 [ 37.855339] ? mark_held_locks+0x130/0x130 [ 37.859560] ? mark_held_locks+0x130/0x130 [ 37.863782] ? follow_page_mask+0x1bda/0x2160 [ 37.868264] __handle_mm_fault+0x3c91/0x5be0 [ 37.872674] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 37.877499] ? pmd_huge+0x140/0x140 [ 37.881112] ? print_usage_bug+0xc0/0xc0 [ 37.885161] ? _raw_spin_unlock+0x2c/0x50 [ 37.889304] ? follow_page_mask+0x18e/0x2160 [ 37.893705] ? zap_class+0x640/0x640 [ 37.897400] ? zap_class+0x640/0x640 [ 37.901099] ? find_held_lock+0x36/0x1c0 [ 37.905147] ? handle_mm_fault+0x42a/0xc70 [ 37.909397] ? lock_downgrade+0x900/0x900 [ 37.913523] ? check_preemption_disabled+0x48/0x280 [ 37.918527] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 37.923445] ? kasan_check_read+0x11/0x20 [ 37.927591] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 37.932863] ? rcu_softirq_qs+0x20/0x20 [ 37.936823] ? trace_hardirqs_off_caller+0x310/0x310 [ 37.941912] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.947433] ? check_preemption_disabled+0x48/0x280 [ 37.952447] handle_mm_fault+0x54f/0xc70 [ 37.956494] ? __handle_mm_fault+0x5be0/0x5be0 [ 37.961059] ? find_vma+0x34/0x190 [ 37.964584] __do_page_fault+0x5e8/0xe60 [ 37.968631] do_page_fault+0xf2/0x7e0 [ 37.972411] ? vmalloc_sync_all+0x30/0x30 [ 37.976551] ? error_entry+0x76/0xd0 [ 37.980246] ? trace_hardirqs_off_caller+0xbb/0x310 [ 37.985268] ? find_held_lock+0x36/0x1c0 [ 37.989327] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.994177] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.999196] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.004027] page_fault+0x1e/0x30 [ 38.007464] RIP: 0010:__clear_user+0x3b/0x70 [ 38.011854] 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 [ 38.030754] RSP: 0018:ffff8881c1527bc8 EFLAGS: 00010206 [ 38.036097] RAX: 0000000000000000 RBX: 000000000000000f RCX: 000000000000000f [ 38.043348] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000203e8008 [ 38.050598] RBP: ffff8881c1527bd8 R08: 1ffff110382a4f55 R09: 0000000000000008 [ 38.057849] R10: 0000000000000001 R11: ffff8881c151c700 R12: 00000000203e8008 [ 38.065097] R13: 00000000203e8008 R14: 00007ffffffff000 R15: 0000000000000000 [ 38.072367] ? __might_fault+0x1a3/0x1e0 [ 38.076414] ? __clear_user+0x23/0x70 [ 38.080212] clear_user+0xb1/0xe0 [ 38.083666] kernel_get_mempolicy+0x292/0x1100 [ 38.088278] ? sp_free+0x60/0x60 [ 38.091626] ? __mpol_equal+0x370/0x370 [ 38.095582] ? up_read+0x77/0x2c0 [ 38.099033] ? up_read_non_owner+0x100/0x100 [ 38.103430] ? do_syscall_64+0x9a/0x820 [ 38.107395] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 38.111959] ? trace_hardirqs_on+0xbd/0x310 [ 38.116280] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.121628] ? trace_hardirqs_off_caller+0x310/0x310 [ 38.126716] __x64_sys_get_mempolicy+0xbe/0x150 [ 38.131368] do_syscall_64+0x1b9/0x820 [ 38.135265] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.140610] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.145521] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.150353] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.155350] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.160348] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.165350] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.170183] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.175352] RIP: 0033:0x440009 [ 38.178539] 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 [ 38.197427] RSP: 002b:00007ffc72fe59b8 EFLAGS: 00000217 ORIG_RAX: 00000000000000ef [ 38.205114] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 38.212363] RDX: 0000000000000401 RSI: 00000000203e8000 RDI: 0000000000000000 [ 38.219612] RBP: 00000000006ca018 R08: 0000000000000003 R09: 0000000000000000 [ 38.226893] R10: 00000000208d3000 R11: 0000000000000217 R12: 0000000000401890 [ 38.234158] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 38.242554] Kernel Offset: disabled [ 38.246256] Rebooting in 86400 seconds..