INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.275483] libceph: mon0 [::1]:6789 socket error on write [ 39.557160] libceph: mon0 [::1]:6789 socket error on write [ 40.517481] libceph: mon0 [::1]:6789 socket error on write [ 41.557382] libceph: mon0 [::1]:6789 socket error on write [ 42.596847] libceph: mon0 [::1]:6789 socket error on write executing program [ 43.276342] libceph: mon0 [::1]:6789 socket error on write [ 43.282701] WARNING: CPU: 1 PID: 5595 at net/ceph/messenger.c:3101 clear_standby+0x174/0x1b0 [ 43.291375] Kernel panic - not syncing: panic_on_warn set ... [ 43.291375] [ 43.298761] CPU: 1 PID: 5595 Comm: syz-executor575 Not tainted 4.19.0-rc4-next-20180921+ #77 [ 43.307346] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.316696] Call Trace: [ 43.319283] dump_stack+0x1d3/0x2c4 [ 43.322915] ? dump_stack_print_info.cold.2+0x52/0x52 [ 43.328120] panic+0x238/0x4e7 [ 43.331310] ? add_taint.cold.5+0x16/0x16 [ 43.335458] ? __warn.cold.8+0x148/0x1ba [ 43.339511] ? __warn.cold.8+0x117/0x1ba [ 43.343563] ? clear_standby+0x174/0x1b0 [ 43.347617] __warn.cold.8+0x163/0x1ba [ 43.351506] ? rcu_softirq_qs+0x20/0x20 [ 43.355481] ? clear_standby+0x174/0x1b0 [ 43.359532] report_bug+0x254/0x2d0 [ 43.363154] do_error_trap+0x1fc/0x4d0 [ 43.367038] ? math_error+0x3f0/0x3f0 [ 43.370843] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.375688] ? trace_hardirqs_off+0x310/0x310 [ 43.380171] ? __mutex_unlock_slowpath+0x430/0x8c0 [ 43.385105] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.389954] do_invalid_op+0x1b/0x20 [ 43.393659] invalid_op+0x14/0x20 [ 43.397100] RIP: 0010:clear_standby+0x174/0x1b0 [ 43.401758] Code: 48 89 da 48 c7 c6 00 99 e3 88 48 c7 c7 e0 d3 4f 8a e8 a0 ee 02 fc e9 fe fe ff ff e8 06 e4 21 fa e9 47 ff ff ff e8 7c 6a de f9 <0f> 0b eb 85 4c 89 ef e8 10 e4 21 fa e9 ae fe ff ff 4c 89 ef e8 03 [ 43.420652] RSP: 0018:ffff8801bfb67710 EFLAGS: 00010293 [ 43.426010] RAX: ffff8801d928e5c0 RBX: ffff8801cbca2028 RCX: ffffffff879ee638 [ 43.433268] RDX: 0000000000000000 RSI: ffffffff879ee6b4 RDI: 0000000000000007 [ 43.440525] RBP: ffff8801bfb67728 R08: ffff8801d928e5c0 R09: ffffed0039794435 [ 43.447802] R10: ffff8801bfb67728 R11: ffff8801cbca21af R12: 0000000000000001 [ 43.455155] R13: ffff8801cbca2160 R14: ffff8801c878fb90 R15: ffff8801bfb67808 [ 43.462430] ? clear_standby+0xf8/0x1b0 [ 43.466406] ? clear_standby+0x174/0x1b0 [ 43.470474] ceph_con_send+0x471/0x930 [ 43.474350] ? ceph_con_opened+0x50/0x50 [ 43.478402] ? ceph_msg_data_add_pages+0x340/0x340 [ 43.483334] ? refcount_inc_checked+0x29/0x70 [ 43.487830] ? ceph_msg_get+0x87/0x190 [ 43.491706] ? ceph_messenger_init+0x3b0/0x3b0 [ 43.496293] ? queue_delayed_work_on+0x130/0x1f0 [ 43.501047] __send_prepared_auth_request+0x155/0x1b0 [ 43.506232] __open_session+0x3df/0x640 [ 43.510208] ? __ceph_monc_want_map+0x15a/0x260 [ 43.514868] ceph_monc_open_session+0x47/0x60 [ 43.519351] __ceph_open_session+0xe2/0x830 [ 43.523667] ? bdi_register_va+0x49/0x80 [ 43.527725] ? ceph_destroy_client+0x200/0x200 [ 43.532297] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.537828] ? super_setup_bdi_name+0x1a5/0x240 [ 43.542487] ? kill_block_super+0x100/0x100 [ 43.546799] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.552337] ceph_mount+0x1410/0x1ea0 [ 43.556154] ? ceph_compare_super+0x5c0/0x5c0 [ 43.560647] ? vfs_parse_fs_string+0x1f8/0x2b0 [ 43.565219] ? rcu_read_lock_sched_held+0x108/0x120 [ 43.570224] ? kfree+0x1fa/0x230 [ 43.573584] ? ceph_compare_super+0x5c0/0x5c0 [ 43.578070] legacy_get_tree+0x131/0x460 [ 43.582125] vfs_get_tree+0x1cb/0x5c0 [ 43.585923] ? legacy_fs_context_dup+0x1d0/0x1d0 [ 43.590672] do_mount+0x70c/0x1d90 [ 43.594201] ? lock_release+0x970/0x970 [ 43.598167] ? copy_mount_string+0x40/0x40 [ 43.602415] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.607973] ? _copy_from_user+0xdf/0x150 [ 43.612128] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.617656] ? copy_mount_options+0x315/0x430 [ 43.622140] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.627667] ksys_mount+0x12d/0x140 [ 43.631290] __x64_sys_mount+0xbe/0x150 [ 43.635258] do_syscall_64+0x1b9/0x820 [ 43.639139] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 43.644491] ? syscall_return_slowpath+0x5e0/0x5e0 [ 43.649410] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.654244] ? trace_hardirqs_off+0x310/0x310 [ 43.658727] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 43.663758] ? prepare_exit_to_usermode+0x291/0x3b0 [ 43.668778] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.673617] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.678795] RIP: 0033:0x440d39 [ 43.681977] Code: e8 cc ab 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 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 43.700868] RSP: 002b:00007ffdf06babe8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 43.708575] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440d39 [ 43.715843] RDX: 00000000200001c0 RSI: 0000000020000180 RDI: 0000000020000240 [ 43.723138] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000009004002c8 [ 43.730410] R10: 0000000000000000 R11: 0000000000000286 R12: 000000000000956a [ 43.737683] R13: 0000000000401d10 R14: 0000000000000000 R15: 0000000000000000 [ 43.745971] Kernel Offset: disabled [ 43.749658] Rebooting in 86400 seconds..