[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.686260] kauditd_printk_skb: 8 callbacks suppressed [ 29.686279] audit: type=1800 audit(1542197098.548:29): pid=5880 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 [ 29.714012] audit: type=1800 audit(1542197098.548:30): pid=5880 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 syzkaller login: [ 32.611541] sshd (6019) used greatest stack depth: 15632 bytes left Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts. executing program [ 116.779608] libceph: connect [d::]:6789 error -101 [ 116.785326] libceph: mon0 [d::]:6789 connect error [ 117.523045] libceph: connect [d::]:6789 error -101 [ 117.528047] libceph: mon0 [d::]:6789 connect error [ 118.482569] libceph: connect [d::]:6789 error -101 [ 118.487604] libceph: mon0 [d::]:6789 connect error [ 120.482507] libceph: connect [d::]:6789 error -101 [ 120.487518] libceph: mon0 [d::]:6789 connect error [ 120.563606] libceph: connect [d::]:6789 error -101 [ 120.568623] libceph: mon0 [d::]:6789 connect error [ 121.522585] libceph: connect [d::]:6789 error -101 [ 121.527641] libceph: mon0 [d::]:6789 connect error executing program [ 121.781238] libceph: connect [d::]:6789 error -101 [ 121.786395] libceph: mon0 [d::]:6789 connect error [ 121.792293] WARNING: CPU: 0 PID: 6040 at net/ceph/messenger.c:3080 clear_standby+0x12f/0x160 [ 121.800961] Kernel panic - not syncing: panic_on_warn set ... [ 121.806835] CPU: 0 PID: 6040 Comm: syz-executor339 Not tainted 4.20.0-rc1-next-20181109+ #110 [ 121.815475] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.824808] Call Trace: [ 121.827384] dump_stack+0x244/0x39d [ 121.831002] ? dump_stack_print_info.cold.1+0x20/0x20 [ 121.836184] panic+0x2ad/0x55c [ 121.839366] ? add_taint.cold.5+0x16/0x16 [ 121.843510] ? __warn.cold.8+0x5/0x45 [ 121.847295] ? __warn+0xe8/0x1d0 [ 121.850647] ? clear_standby+0x12f/0x160 [ 121.854698] __warn.cold.8+0x20/0x45 [ 121.858398] ? rcu_softirq_qs+0x20/0x20 [ 121.862364] ? clear_standby+0x12f/0x160 [ 121.866435] report_bug+0x254/0x2d0 [ 121.870052] do_error_trap+0x11b/0x200 [ 121.873927] do_invalid_op+0x36/0x40 [ 121.877625] ? clear_standby+0x12f/0x160 [ 121.881683] invalid_op+0x14/0x20 [ 121.885122] RIP: 0010:clear_standby+0x12f/0x160 [ 121.889830] Code: de e8 d5 26 d3 f9 48 85 db 0f 84 39 ff ff ff e8 97 25 d3 f9 0f 0b e9 2d ff ff ff e8 6b 7d 16 fa e9 67 ff ff ff e8 81 25 d3 f9 <0f> 0b eb a5 e8 78 7d 16 fa e9 f6 fe ff ff 4c 89 ef e8 6b 7d 16 fa [ 121.908734] RSP: 0018:ffff8801c1f5f708 EFLAGS: 00010293 [ 121.914091] RAX: ffff8801c1fcc6c0 RBX: ffff8801c16b8568 RCX: ffffffff87ac82d3 [ 121.921346] RDX: 0000000000000000 RSI: ffffffff87ac832f RDI: 0000000000000007 [ 121.928603] RBP: ffff8801c1f5f720 R08: ffff8801c1fcc6c0 R09: ffffed00382d70dd [ 121.935862] R10: ffff8801c1f5f720 R11: ffff8801c16b86ef R12: 0000000000000001 [ 121.943224] R13: ffff8801c16b86a0 R14: ffff8801c1d90e30 R15: ffff8801c1f5f7f0 [ 121.950492] ? clear_standby+0xd3/0x160 [ 121.954452] ? clear_standby+0x12f/0x160 [ 121.958505] ? clear_standby+0x12f/0x160 [ 121.962553] ceph_con_send+0x460/0x600 [ 121.966448] ? ceph_msg_new+0x40/0x40 [ 121.970269] ? ceph_auth_entity_name_encode+0x120/0x120 [ 121.975623] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 121.981150] __send_prepared_auth_request+0x155/0x1b0 [ 121.986327] __open_session+0x3cd/0x550 [ 121.990293] ceph_monc_open_session+0x193/0x350 [ 121.994951] __ceph_open_session+0xe2/0x810 [ 121.999265] ? bdi_register_va+0x49/0x80 [ 122.003326] ? ceph_destroy_client+0x1a0/0x1a0 [ 122.007914] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.013457] ? super_setup_bdi_name+0x1a5/0x240 [ 122.018119] ? kill_block_super+0x100/0x100 [ 122.022433] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.027984] ceph_mount+0x11c5/0x1b30 [ 122.031787] ? ceph_compare_super+0x520/0x520 [ 122.036277] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 122.041814] ? alloc_pages_current+0x17b/0x350 [ 122.046386] ? ceph_compare_super+0x520/0x520 [ 122.050871] legacy_get_tree+0x12f/0x260 [ 122.054924] ? security_fs_context_validate+0x80/0xa0 [ 122.060240] vfs_get_tree+0x1cb/0x5c0 [ 122.064048] ? legacy_fs_context_dup+0x1d0/0x1d0 [ 122.068844] do_mount+0x82a/0x1ff0 [ 122.072400] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 122.077941] ? copy_mount_string+0x40/0x40 [ 122.082163] ? copy_mount_options+0x5f/0x430 [ 122.086564] ? kmem_cache_alloc_trace+0x353/0x750 [ 122.091409] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 122.096936] ? _copy_from_user+0xdf/0x150 [ 122.101081] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.106610] ? copy_mount_options+0x315/0x430 [ 122.111094] ksys_mount+0x12d/0x140 [ 122.114731] __x64_sys_mount+0xbe/0x150 [ 122.118814] do_syscall_64+0x1b9/0x820 [ 122.122706] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 122.128167] ? syscall_return_slowpath+0x5e0/0x5e0 [ 122.133088] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 122.137949] ? trace_hardirqs_on_caller+0x310/0x310 [ 122.143042] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 122.148083] ? prepare_exit_to_usermode+0x291/0x3b0 [ 122.153092] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 122.157927] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 122.163106] RIP: 0033:0x441229 [ 122.166303] Code: e8 8c b2 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 8b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 122.185207] RSP: 002b:00007ffcebdbb8b8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 122.192906] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000441229 [ 122.200180] RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000020000040 [ 122.207491] RBP: 0000000000000000 R08: 0000000020000140 R09: 0000000000000000 [ 122.214765] R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000001 [ 122.222065] R13: 000000000001c808 R14: 0000000000000000 R15: 0000000000000000 [ 122.230491] Kernel Offset: disabled [ 122.234171] Rebooting in 86400 seconds..