[....] 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. [ 30.093540] kauditd_printk_skb: 7 callbacks suppressed [ 30.093552] audit: type=1800 audit(1544111661.049:29): pid=5909 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.125489] audit: type=1800 audit(1544111661.049:30): pid=5909 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: [ 34.291230] sshd (6047) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.0.83' (ECDSA) to the list of known hosts. executing program [ 40.776726] WARNING: CPU: 1 PID: 6064 at mm/mempolicy.c:1745 alloc_pages_vma+0x1bd/0x4a0 [ 40.785130] Kernel panic - not syncing: panic_on_warn set ... [ 40.790997] CPU: 1 PID: 6064 Comm: syz-executor463 Not tainted 4.20.0-rc5+ #143 [ 40.798474] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.807810] Call Trace: [ 40.810383] dump_stack+0x244/0x39d [ 40.814025] ? dump_stack_print_info.cold.1+0x20/0x20 [ 40.819201] panic+0x2ad/0x55c [ 40.822378] ? add_taint.cold.5+0x16/0x16 [ 40.826526] ? __warn.cold.8+0x5/0x45 [ 40.830313] ? __warn+0xe8/0x1d0 [ 40.833660] ? alloc_pages_vma+0x1bd/0x4a0 [ 40.837902] __warn.cold.8+0x20/0x45 [ 40.841598] ? rcu_softirq_qs+0x20/0x20 [ 40.845553] ? alloc_pages_vma+0x1bd/0x4a0 [ 40.849776] report_bug+0x254/0x2d0 [ 40.853389] do_error_trap+0x11b/0x200 [ 40.857277] do_invalid_op+0x36/0x40 [ 40.860988] ? alloc_pages_vma+0x1bd/0x4a0 [ 40.865201] invalid_op+0x14/0x20 [ 40.868660] RIP: 0010:alloc_pages_vma+0x1bd/0x4a0 [ 40.873515] 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 [ 40.892412] RSP: 0000:ffff8881b1976918 EFLAGS: 00010293 [ 40.897754] RAX: ffff8881bef646c0 RBX: ffff8881da96f000 RCX: ffffffff81c06c9f [ 40.905025] RDX: 0000000000000000 RSI: ffffffff81c06cad RDI: 0000000000000005 [ 40.912280] RBP: ffff8881b1976958 R08: ffff8881bef646c0 R09: ffffed1039748760 [ 40.919535] R10: ffffed1039748760 R11: ffff8881cba43b03 R12: 0000000000040000 [ 40.926788] R13: 00000000000742ca R14: ffff8881da96f008 R15: 0000000000000002 [ 40.934046] ? alloc_pages_vma+0x1af/0x4a0 [ 40.938265] ? alloc_pages_vma+0x1bd/0x4a0 [ 40.942499] ? alloc_pages_vma+0x1bd/0x4a0 [ 40.946747] do_huge_pmd_wp_page+0x1373/0x5fc0 [ 40.951323] ? print_usage_bug+0xc0/0xc0 [ 40.955370] ? __split_huge_pmd+0xa70/0xa70 [ 40.959814] ? lock_unpin_lock+0x4a0/0x4a0 [ 40.964034] ? mark_held_locks+0x130/0x130 [ 40.968267] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 40.972867] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.978384] ? __alloc_pages_nodemask+0x653/0xea0 [ 40.983208] ? trace_hardirqs_off_caller+0x310/0x310 [ 40.988327] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 40.993861] ? kernel_poison_pages+0x15a/0x290 [ 40.998423] ? kasan_unpoison_shadow+0x35/0x50 [ 41.002994] ? preempt_count_add+0xbc/0x1b0 [ 41.007304] ? get_page_from_freelist+0x17ae/0x5340 [ 41.012337] ? noop_count+0x40/0x40 [ 41.015962] ? print_bfs_bug+0x80/0x80 [ 41.019837] ? find_held_lock+0x36/0x1c0 [ 41.023895] ? check_usage+0x1aa/0x790 [ 41.027762] ? __unlock_page_memcg+0x53/0x100 [ 41.032361] ? check_usage_forwards+0x3d0/0x3d0 [ 41.037024] ? __lock_acquire+0x62f/0x4c20 [ 41.041240] ? __bfs+0x321/0x780 [ 41.044595] ? print_usage_bug+0xc0/0xc0 [ 41.048637] ? print_bfs_bug+0x80/0x80 [ 41.052520] ? print_usage_bug+0xc0/0xc0 [ 41.056583] ? __lock_acquire+0x62f/0x4c20 [ 41.060803] ? kasan_check_read+0x11/0x20 [ 41.064942] ? __lock_acquire+0x2aff/0x4c20 [ 41.069245] ? __lock_acquire+0x62f/0x4c20 [ 41.073496] ? mark_held_locks+0x130/0x130 [ 41.077729] ? mark_held_locks+0x130/0x130 [ 41.081949] ? mark_held_locks+0x130/0x130 [ 41.086164] ? print_usage_bug+0xc0/0xc0 [ 41.090204] ? lock_downgrade+0x900/0x900 [ 41.094335] ? print_usage_bug+0xc0/0xc0 [ 41.098414] ? print_usage_bug+0xc0/0xc0 [ 41.102508] ? __lock_acquire+0x62f/0x4c20 [ 41.106722] ? __lock_acquire+0x62f/0x4c20 [ 41.110943] ? mark_held_locks+0x130/0x130 [ 41.115158] ? mark_held_locks+0x130/0x130 [ 41.119419] ? is_bpf_text_address+0xac/0x170 [ 41.123931] ? find_held_lock+0x36/0x1c0 [ 41.127980] __handle_mm_fault+0x2ddc/0x5be0 [ 41.132378] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 41.137203] ? print_usage_bug+0xc0/0xc0 [ 41.141245] ? do_raw_spin_unlock+0xa7/0x330 [ 41.145642] ? trace_hardirqs_on+0x310/0x310 [ 41.150035] ? zap_class+0x640/0x640 [ 41.153725] ? zap_class+0x640/0x640 [ 41.157441] ? find_held_lock+0x36/0x1c0 [ 41.161524] ? handle_mm_fault+0x42a/0xc70 [ 41.165739] ? lock_downgrade+0x900/0x900 [ 41.169887] ? check_preemption_disabled+0x48/0x280 [ 41.174903] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 41.179815] ? kasan_check_read+0x11/0x20 [ 41.183945] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 41.189203] ? rcu_softirq_qs+0x20/0x20 [ 41.193174] ? trace_hardirqs_off_caller+0x310/0x310 [ 41.198278] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.203801] ? check_preemption_disabled+0x48/0x280 [ 41.208802] handle_mm_fault+0x54f/0xc70 [ 41.212848] ? __handle_mm_fault+0x5be0/0x5be0 [ 41.217416] ? find_vma+0x34/0x190 [ 41.220941] __do_page_fault+0x5e8/0xe60 [ 41.224986] do_page_fault+0xf2/0x7e0 [ 41.228765] ? vmalloc_sync_all+0x30/0x30 [ 41.232909] ? error_entry+0x76/0xd0 [ 41.236604] ? trace_hardirqs_off_caller+0xbb/0x310 [ 41.241615] ? find_held_lock+0x36/0x1c0 [ 41.245689] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.250514] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.255515] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.260342] page_fault+0x1e/0x30 [ 41.263777] RIP: 0010:__clear_user+0x3b/0x70 [ 41.268178] 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 [ 41.287058] RSP: 0000:ffff8881b1977ae8 EFLAGS: 00010202 [ 41.292399] RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000000008 [ 41.299649] RDX: 0000000000000000 RSI: ffffffff81b1b3d3 RDI: 00000000200001c0 [ 41.306929] RBP: ffff8881b1977af8 R08: 1ffff1103632ef39 R09: 0000000000000008 [ 41.314176] R10: 0000000000000001 R11: ffff8881bef646c0 R12: 00000000200001c0 [ 41.321444] R13: 000000001fffffc0 R14: 0000000000000001 R15: 00007ffffffff000 [ 41.328705] ? __might_fault+0x1a3/0x1e0 [ 41.332751] ? __clear_user+0x23/0x70 [ 41.336538] copy_fpstate_to_sigframe+0x297/0x530 [ 41.341368] get_sigframe.isra.11.constprop.12+0x559/0xd30 [ 41.346972] ? restore_sigcontext+0x780/0x780 [ 41.351479] ? force_sig_info+0x281/0x310 [ 41.355629] ? force_sig_fault+0x12c/0x1d0 [ 41.359862] do_signal+0xadc/0x21c0 [ 41.363492] ? setup_sigcontext+0x7d0/0x7d0 [ 41.367823] ? __bad_area_nosemaphore+0x2e1/0x3a0 [ 41.372646] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.378163] ? exit_to_usermode_loop+0x8c/0x380 [ 41.382868] ? exit_to_usermode_loop+0x8c/0x380 [ 41.387551] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 41.392146] exit_to_usermode_loop+0x2e5/0x380 [ 41.396709] ? __bpf_trace_sys_exit+0x30/0x30 [ 41.401200] ? trace_hardirqs_off_caller+0xbb/0x310 [ 41.406198] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.411036] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.415901] prepare_exit_to_usermode+0x342/0x3b0 [ 41.420729] ? trace_event_raw_event_sys_enter+0x700/0x700 [ 41.426335] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.431157] ? page_fault+0x8/0x30 [ 41.434674] retint_user+0x8/0x18 [ 41.438102] RIP: 0033: (null) [ 41.441990] Code: Bad RIP value. [ 41.445347] RSP: 002b:0000000020000388 EFLAGS: 00010217 [ 41.450690] RAX: 0000000000000000 RBX: 00007fff7dd94e70 RCX: 00000000004403b9 [ 41.457938] RDX: 0000000000000000 RSI: 0000000020000380 RDI: 0000000000000000 [ 41.465186] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000004009ae [ 41.472434] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000401c40 [ 41.479685] R13: 0000000000401cd0 R14: 0000000000000000 R15: 0000000000000000 [ 41.488139] Kernel Offset: disabled [ 41.491826] Rebooting in 86400 seconds..