[ 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 '10.128.1.1' (ECDSA) to the list of known hosts. syzkaller login: [ 34.684782] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 34.767112] syz-executor169[8105]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 34.767123] Code: Bad RIP value. [ 34.792258] syz-executor169[8109]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 34.792270] Code: Bad RIP value. executing program executing program [ 35.027135] syz-executor169[8116]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.041723] Code: Bad RIP value. [ 35.049233] syz-executor169[8119]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.059971] Code: Bad RIP value. executing program executing program [ 35.280189] syz-executor169[8127]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.297661] Code: Bad RIP value. executing program [ 35.347656] syz-executor169[8134]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.359694] Code: Bad RIP value. executing program [ 35.408499] syz-executor169[8140]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.424962] Code: Bad RIP value. [ 35.468561] syz-executor169[8144]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.477740] Code: Bad RIP value. executing program executing program [ 35.697168] syz-executor169[8151]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.706858] Code: Bad RIP value. [ 35.716855] syz-executor169[8153]: segfault at 0 ip 0000000000000000 sp 00000000200000c8 error 14 [ 35.725877] Code: Bad RIP value. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 37.155856] WARNING: CPU: 1 PID: 8211 at fs/buffer.c:1087 mark_buffer_dirty+0x464/0x5c0 [ 37.164217] Kernel panic - not syncing: panic_on_warn set ... [ 37.164217] [ 37.171573] CPU: 1 PID: 8211 Comm: syz-executor169 Not tainted 4.19.211-syzkaller #0 [ 37.179436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 [ 37.188765] Call Trace: [ 37.191333] dump_stack+0x1fc/0x2ef [ 37.194942] panic+0x26a/0x50e [ 37.198113] ? __warn_printk+0xf3/0xf3 [ 37.201981] ? mark_buffer_dirty+0x464/0x5c0 [ 37.206368] ? __probe_kernel_read+0x130/0x1b0 [ 37.210946] ? __warn.cold+0x5/0x5a [ 37.214557] ? __warn+0xe4/0x200 [ 37.217904] ? mark_buffer_dirty+0x464/0x5c0 [ 37.222291] __warn.cold+0x20/0x5a [ 37.225813] ? check_preemption_disabled+0x41/0x280 [ 37.230811] ? mark_buffer_dirty+0x464/0x5c0 [ 37.235196] report_bug+0x262/0x2b0 [ 37.238820] do_error_trap+0x1d7/0x310 [ 37.242688] ? math_error+0x310/0x310 [ 37.246466] ? lock_downgrade+0x720/0x720 [ 37.250597] ? error_entry+0x72/0xd0 [ 37.254290] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.259288] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.264125] invalid_op+0x14/0x20 [ 37.267577] RIP: 0010:mark_buffer_dirty+0x464/0x5c0 [ 37.272588] Code: c1 ea 03 80 3c 02 00 0f 85 6c 01 00 00 48 8b 3b be 04 00 00 00 e8 3c 7b fd ff 5b 5d 41 5c 41 5d e9 c1 34 b2 ff e8 bc 34 b2 ff <0f> 0b e9 d6 fb ff ff e8 b0 34 b2 ff 0f 0b e9 fa fb ff ff e8 a4 34 [ 37.291471] RSP: 0018:ffff888091db7880 EFLAGS: 00010293 [ 37.296820] RAX: ffff8880b13582c0 RBX: ffff888089b6fa80 RCX: ffffffff81b04c88 [ 37.304069] RDX: 0000000000000000 RSI: ffffffff81b050b4 RDI: 0000000000000001 [ 37.312103] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 37.319350] R10: 0000000000000001 R11: 0000000000000000 R12: ffff888091d78140 [ 37.326599] R13: ffffed10123af04d R14: ffff888089b6fa80 R15: 0000000000000015 [ 37.333862] ? mark_buffer_dirty+0x38/0x5c0 [ 37.338260] ? mark_buffer_dirty+0x464/0x5c0 [ 37.342668] bfs_get_block+0x3b6/0xd00 [ 37.346543] ? create_page_buffers+0x190/0x350 [ 37.351108] __block_write_begin_int+0x46c/0x17b0 [ 37.355930] ? bfs_bmap+0x30/0x30 [ 37.359373] ? __breadahead_gfp+0x130/0x130 [ 37.363683] ? wait_for_stable_page+0x122/0x360 [ 37.368334] ? bfs_bmap+0x30/0x30 [ 37.371765] block_write_begin+0x58/0x2e0 [ 37.375893] bfs_write_begin+0x35/0xd0 [ 37.379764] generic_perform_write+0x1f8/0x4d0 [ 37.384332] ? filemap_page_mkwrite+0x2f0/0x2f0 [ 37.388982] ? current_time+0x1c0/0x1c0 [ 37.392940] ? lock_acquire+0x170/0x3c0 [ 37.396894] __generic_file_write_iter+0x24b/0x610 [ 37.401804] generic_file_write_iter+0x3f8/0x730 [ 37.406540] __vfs_write+0x51b/0x770 [ 37.410232] ? kernel_read+0x110/0x110 [ 37.414101] ? check_preemption_disabled+0x41/0x280 [ 37.419116] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 37.424131] vfs_write+0x1f3/0x540 [ 37.427660] ksys_write+0x12b/0x2a0 [ 37.431274] ? __ia32_sys_read+0xb0/0xb0 [ 37.435322] ? trace_hardirqs_off_caller+0x6e/0x210 [ 37.440318] ? do_syscall_64+0x21/0x620 [ 37.444283] do_syscall_64+0xf9/0x620 [ 37.448069] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.453240] RIP: 0033:0x7f8af71062b9 [ 37.456936] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 37.475995] RSP: 002b:00007fffcb05fca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 37.483706] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f8af71062b9 [ 37.490954] RDX: 000000000208e24b RSI: 0000000020000080 RDI: 0000000000000003 [ 37.498202] RBP: 0000000000000000 R08: 00007fffcb05fcd0 R09: 00007fffcb05fcd0 [ 37.505452] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffcb05fccc [ 37.512766] R13: 00007fffcb05fd00 R14: 00007fffcb05fce0 R15: 0000000000000014 [ 37.520320] Kernel Offset: disabled [ 37.523985] Rebooting in 86400 seconds..