[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.99' (ECDSA) to the list of known hosts. syzkaller login: [ 34.181412] IPVS: ftp: loaded support on port[0] = 21 executing program [ 34.472511] vma ffff8880b4c25880 start 0000000020000000 end 0000000020600000 [ 34.472511] next ffff8880a97e5e70 prev ffff88809eaacc60 mm ffff88809f93b600 [ 34.472511] prot 25 anon_vma 0000000000000000 vm_ops ffffffff8871e3a0 [ 34.472511] pgoff 0 file ffff8880b2ad7000 private_data 0000000000000000 [ 34.472511] flags: 0x20fe(write|exec|shared|mayread|maywrite|mayexec|mayshare|locked) [ 34.508259] ------------[ cut here ]------------ [ 34.513005] kernel BUG at mm/memory.c:4081! [ 34.519012] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 34.524384] CPU: 1 PID: 8140 Comm: syz-executor375 Not tainted 4.19.211-syzkaller #0 [ 34.532376] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.541770] RIP: 0010:__handle_mm_fault+0x2888/0x41c0 [ 34.546950] Code: aa d5 ff 84 db 0f 84 35 e3 ff ff e8 92 a9 d5 ff 48 89 ef e8 8a ce f4 ff e9 23 e3 ff ff e8 80 a9 d5 ff 48 89 ef e8 07 b9 67 06 <0f> 0b e8 71 a9 d5 ff 4c 8d 4c 24 60 4c 89 cf e8 04 c0 0d 00 41 89 [ 34.566011] RSP: 0018:ffff888094c17778 EFLAGS: 00010283 [ 34.571364] RAX: 0000000000000140 RBX: 0000000000000008 RCX: 0000000000000000 [ 34.578698] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012982eca [ 34.585945] RBP: ffff8880b4c25880 R08: 0000000000000140 R09: 0000000000000000 [ 34.593191] R10: 0000000000000005 R11: 0000000000000000 R12: 000000008b4000e5 [ 34.600440] R13: 1ffff11012982ef5 R14: 0000000000000001 R15: ffff88809f93b600 [ 34.608377] FS: 00007f55c58ba700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 34.616581] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.622439] CR2: 00007fc154211010 CR3: 00000000a8e3d000 CR4: 00000000003406e0 [ 34.629691] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.636938] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.644183] Call Trace: [ 34.646755] ? vm_insert_page+0x9c0/0x9c0 [ 34.651068] ? mark_held_locks+0xf0/0xf0 [ 34.655115] ? debug_object_assert_init+0x242/0x2e0 [ 34.660120] ? check_preemption_disabled+0x41/0x280 [ 34.665131] handle_mm_fault+0x436/0xb10 [ 34.669175] __do_page_fault+0x68e/0xd60 [ 34.673225] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.678364] ? spurious_fault+0x840/0x840 [ 34.682508] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.687433] page_fault+0x1e/0x30 [ 34.691320] RIP: 0010:ep_send_events_proc+0x5c1/0xb50 [ 34.696493] Code: 0f 85 d6 04 00 00 48 81 c4 b0 00 00 00 31 c0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 2a a2 ad ff 0f 01 cb 45 31 f6 48 8b 44 24 30 <44> 89 38 0f 01 ca 31 ff 44 89 f6 e8 7f a3 ad ff 45 85 f6 0f 85 22 [ 34.715382] RSP: 0018:ffff888094c17a98 EFLAGS: 00050246 [ 34.720730] RAX: 0000000020000100 RBX: ffff8880a0da4798 RCX: ffffffff81b4df7d [ 34.727988] RDX: 0000000000000000 RSI: ffffffff81b4e346 RDI: 0000000000000005 [ 34.735247] RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 [ 34.742504] R10: 0000000000000005 R11: 0000000000074071 R12: ffff8880a0da47a0 [ 34.749755] R13: ffff888094c17d38 R14: 0000000000000000 R15: 0000000000000004 [ 34.757025] ? ep_send_events_proc+0x1ed/0xb50 [ 34.761583] ? ep_send_events_proc+0x5b6/0xb50 [ 34.766215] ? ep_send_events_proc+0x5b6/0xb50 [ 34.771043] ? ep_read_events_proc+0x440/0x440 [ 34.775619] ? _raw_spin_unlock_irq+0x24/0x80 [ 34.780103] ? ep_read_events_proc+0x440/0x440 [ 34.784685] ep_scan_ready_list+0x285/0x9a0 [ 34.788993] ? ep_poll_callback+0xc80/0xc80 [ 34.793299] ? ep_poll+0xada/0xcb0 [ 34.796839] ? _raw_spin_unlock_irq+0x24/0x80 [ 34.801351] ep_poll+0x36f/0xcb0 [ 34.804725] ? ep_send_events_proc+0xb50/0xb50 [ 34.809299] ? check_preemption_disabled+0x41/0x280 [ 34.814310] ? __fget+0x356/0x510 [ 34.817747] ? wake_up_q+0xe0/0xe0 [ 34.821268] do_epoll_wait+0x1aa/0x200 [ 34.825133] __se_sys_epoll_pwait+0x252/0x290 [ 34.829607] ? do_epoll_wait+0x200/0x200 [ 34.833647] ? ep_poll_wakeup_proc+0x40/0x40 [ 34.838044] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.843406] ? trace_hardirqs_off_caller+0x6e/0x210 [ 34.848420] ? do_syscall_64+0x21/0x620 [ 34.852404] do_syscall_64+0xf9/0x620 [ 34.856204] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.861390] RIP: 0033:0x7f55c592df89 [ 34.865092] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 34.883975] RSP: 002b:00007f55c58ba268 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 [ 34.891761] RAX: ffffffffffffffda RBX: 00007f55c59b2430 RCX: 00007f55c592df89 [ 34.899009] RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000008 [ 34.906394] RBP: 00007f55c597f190 R08: 0000000000000000 R09: 0000000000000000 [ 34.913647] R10: 00000000fffeffff R11: 0000000000000246 R12: 776c613d65677568 [ 34.920904] R13: 00007ffda6ba01cf R14: 65725f7261656c63 R15: 00007f55c59b2438 [ 34.928159] Modules linked in: [ 34.933277] ---[ end trace aca321c0a905ed68 ]--- [ 34.938049] RIP: 0010:__handle_mm_fault+0x2888/0x41c0 [ 34.943587] Code: aa d5 ff 84 db 0f 84 35 e3 ff ff e8 92 a9 d5 ff 48 89 ef e8 8a ce f4 ff e9 23 e3 ff ff e8 80 a9 d5 ff 48 89 ef e8 07 b9 67 06 <0f> 0b e8 71 a9 d5 ff 4c 8d 4c 24 60 4c 89 cf e8 04 c0 0d 00 41 89 [ 34.962860] RSP: 0018:ffff888094c17778 EFLAGS: 00010283 [ 34.968469] RAX: 0000000000000140 RBX: 0000000000000008 RCX: 0000000000000000 [ 34.975990] RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012982eca [ 34.983484] RBP: ffff8880b4c25880 R08: 0000000000000140 R09: 0000000000000000 [ 34.990764] R10: 0000000000000005 R11: 0000000000000000 R12: 000000008b4000e5 [ 34.998289] R13: 1ffff11012982ef5 R14: 0000000000000001 R15: ffff88809f93b600 [ 35.005781] FS: 00007f55c58ba700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 35.014205] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.020179] CR2: 0000000020000100 CR3: 00000000a8e3d000 CR4: 00000000003406f0 [ 35.027708] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.035435] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.042693] Kernel panic - not syncing: Fatal exception [ 35.048271] Kernel Offset: disabled [ 35.051882] Rebooting in 86400 seconds..