[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 41.950686] audit: type=1800 audit(1546938656.425:25): pid=7925 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 41.970436] audit: type=1800 audit(1546938656.425:26): pid=7925 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 41.998684] audit: type=1800 audit(1546938656.425:27): pid=7925 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.15.221' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.014914] libceph: connect [d::]:6789 error -101 [ 54.020225] libceph: mon0 [d::]:6789 connect error executing program [ 54.180197] libceph: connect [d::]:6789 error -101 [ 54.185344] libceph: mon0 [d::]:6789 connect error [ 54.190925] WARNING: CPU: 0 PID: 8082 at net/ceph/messenger.c:3073 clear_standby+0x12f/0x160 [ 54.199536] Kernel panic - not syncing: panic_on_warn set ... [ 54.205411] CPU: 0 PID: 8082 Comm: syz-executor075 Not tainted 5.0.0-rc1+ #14 [ 54.212665] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.221999] Call Trace: [ 54.224578] dump_stack+0x1db/0x2d0 [ 54.228219] ? dump_stack_print_info.cold+0x20/0x20 [ 54.233245] ? clear_standby+0x100/0x160 [ 54.237292] panic+0x2cb/0x65c [ 54.240483] ? add_taint.cold+0x16/0x16 [ 54.244456] ? clear_standby+0x12f/0x160 [ 54.248501] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.254025] ? __probe_kernel_read+0x1f4/0x250 [ 54.258591] ? __warn.cold+0x5/0x48 [ 54.262205] ? __warn+0xe8/0x1d0 [ 54.265644] ? clear_standby+0x12f/0x160 [ 54.269691] __warn.cold+0x20/0x48 [ 54.273224] ? clear_standby+0x12f/0x160 [ 54.277273] report_bug+0x263/0x2b0 [ 54.280890] do_error_trap+0x11b/0x200 [ 54.284763] do_invalid_op+0x37/0x50 [ 54.288460] ? clear_standby+0x12f/0x160 [ 54.292507] invalid_op+0x14/0x20 [ 54.295946] RIP: 0010:clear_standby+0x12f/0x160 [ 54.300606] Code: de e8 c5 6c bb f9 48 85 db 0f 84 39 ff ff ff e8 17 6b bb f9 0f 0b e9 2d ff ff ff e8 5b 56 ff f9 e9 67 ff ff ff e8 01 6b bb f9 <0f> 0b eb a5 e8 68 56 ff f9 e9 f6 fe ff ff 4c 89 ef e8 5b 56 ff f9 [ 54.319529] RSP: 0018:ffff88808e3ef6d0 EFLAGS: 00010293 [ 54.324875] RAX: ffff88808f08c480 RBX: ffff88808dc0db28 RCX: ffffffff87c68bd3 [ 54.332130] RDX: 0000000000000000 RSI: ffffffff87c68c2f RDI: 0000000000000007 [ 54.339381] RBP: ffff88808e3ef6e8 R08: ffff88808f08c480 R09: ffffed1011b81b96 [ 54.346635] R10: ffff88808e3ef6e8 R11: ffff88808dc0dcaf R12: 0000000000000001 [ 54.353894] R13: ffff88808dc0dc60 R14: ffff88808e3ef798 R15: ffff88808dc0dca8 [ 54.361191] ? clear_standby+0xd3/0x160 [ 54.365158] ? clear_standby+0x12f/0x160 [ 54.369205] ceph_con_send+0x450/0x610 [ 54.373088] ? ceph_msg_new+0x40/0x40 [ 54.376890] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 54.382430] __send_prepared_auth_request+0x155/0x1b0 [ 54.387620] __open_session+0x3d9/0x570 [ 54.391585] ceph_monc_open_session+0x1a2/0x360 [ 54.396247] __ceph_open_session+0xe2/0x7e0 [ 54.400555] ? bdi_register_va+0x4c/0x80 [ 54.404604] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.410129] ? ceph_destroy_client+0x1a0/0x1a0 [ 54.414705] ? kill_block_super+0x100/0x100 [ 54.419016] ? ceph_put_super+0x70/0x70 [ 54.422971] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.428493] ? ns_capable_common+0x141/0x170 [ 54.432906] ceph_mount+0x10b4/0x1c50 [ 54.436696] ? ceph_compare_super+0x510/0x510 [ 54.441186] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 54.446730] ? smack_sb_eat_lsm_opts+0x52d/0x690 [ 54.451477] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.457013] mount_fs+0x123/0x43a [ 54.460466] ? emergency_thaw_all+0x260/0x260 [ 54.464952] ? lock_release+0xc40/0xc40 [ 54.468913] ? digsig_verify.cold+0x32/0x32 [ 54.473231] vfs_kern_mount.part.0+0xdb/0x570 [ 54.477714] ? may_umount+0xb0/0xb0 [ 54.481327] ? _raw_read_unlock+0x2d/0x50 [ 54.485462] ? __get_fs_type+0x9a/0xd0 [ 54.489367] do_mount+0x58e/0x3330 [ 54.492894] ? rcu_pm_notify+0xd0/0xd0 [ 54.496771] ? copy_mount_string+0x40/0x40 [ 54.500993] ? kmem_cache_alloc_trace+0x354/0x760 [ 54.505827] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.511362] ? copy_mount_options+0x30e/0x440 [ 54.515866] ksys_mount+0xdb/0x150 [ 54.519405] __x64_sys_mount+0xbe/0x150 [ 54.523373] do_syscall_64+0x1a3/0x800 [ 54.527246] ? syscall_return_slowpath+0x5f0/0x5f0 [ 54.532160] ? prepare_exit_to_usermode+0x232/0x3b0 [ 54.537162] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.541993] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.547165] RIP: 0033:0x4463d9 [ 54.550344] Code: e8 1c b4 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 54.569237] RSP: 002b:00007f435d6a5ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 54.576929] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 00000000004463d9 [ 54.584181] RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000020000040 [ 54.591433] RBP: 00000000006dbc20 R08: 00000000200000c0 R09: 0000000000000000 [ 54.598691] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 54.605941] R13: 00007ffe443a7aff R14: 00007f435d6a69c0 R15: 00000000006dbd2c [ 54.614301] Kernel Offset: disabled [ 54.617965] Rebooting in 86400 seconds..