[ 61.816725][ T26] audit: type=1800 audit(1560627185.554:25): pid=9011 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.863890][ T26] audit: type=1800 audit(1560627185.554:26): pid=9011 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.900593][ T26] audit: type=1800 audit(1560627185.554:27): pid=9011 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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. [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.027424][ T9186] IPVS: ftp: loaded support on port[0] = 21 [ 74.059860][ T9186] BUG: Dentry 0000000047b3ebb4{i=1,n=/} still in use (2) [unmount of sysfs sysfs] [ 74.069552][ T9186] WARNING: CPU: 1 PID: 9186 at fs/dcache.c:1529 umount_check.cold+0xe9/0x10a [ 74.078312][ T9186] Kernel panic - not syncing: panic_on_warn set ... [ 74.084881][ T9186] CPU: 1 PID: 9186 Comm: syz-executor805 Not tainted 5.2.0-rc4+ #51 [ 74.092837][ T9186] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.102869][ T9186] Call Trace: [ 74.106143][ T9186] dump_stack+0x172/0x1f0 [ 74.110458][ T9186] ? umount_check.cold+0x86/0x10a [ 74.115465][ T9186] panic+0x2cb/0x744 [ 74.119339][ T9186] ? __warn_printk+0xf3/0xf3 [ 74.123916][ T9186] ? umount_check.cold+0xe9/0x10a [ 74.128920][ T9186] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.135140][ T9186] ? __warn.cold+0x5/0x4d [ 74.139447][ T9186] ? __warn+0xe8/0x1d0 [ 74.143493][ T9186] ? umount_check.cold+0xe9/0x10a [ 74.148494][ T9186] __warn.cold+0x20/0x4d [ 74.152716][ T9186] ? umount_check.cold+0xe9/0x10a [ 74.157721][ T9186] report_bug+0x263/0x2b0 [ 74.162038][ T9186] do_error_trap+0x11b/0x200 [ 74.166606][ T9186] do_invalid_op+0x37/0x50 [ 74.171003][ T9186] ? umount_check.cold+0xe9/0x10a [ 74.176004][ T9186] invalid_op+0x14/0x20 [ 74.180138][ T9186] RIP: 0010:umount_check.cold+0xe9/0x10a [ 74.185747][ T9186] Code: 89 ff e8 00 5c f0 ff 48 81 c3 68 06 00 00 45 89 e8 4c 89 e1 53 4d 8b 0f 4c 89 f2 4c 89 e6 48 c7 c7 c0 ff 75 87 e8 a1 bd a1 ff <0f> 0b 58 e9 bd 2a ff ff e8 d0 5b f0 ff e9 29 ff ff ff 45 31 f6 e9 [ 74.205326][ T9186] RSP: 0018:ffff888091cdfbb8 EFLAGS: 00010282 [ 74.211366][ T9186] RAX: 0000000000000050 RBX: ffff88808a348868 RCX: 0000000000000000 [ 74.219315][ T9186] RDX: 0000000000000000 RSI: ffffffff815ac956 RDI: ffffed101239bf69 [ 74.227268][ T9186] RBP: ffff888091cdfbe8 R08: 0000000000000050 R09: ffff8880944a2c48 [ 74.235218][ T9186] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888091701b40 [ 74.243196][ T9186] R13: 0000000000000002 R14: 0000000000000001 R15: ffffffff88c939a0 [ 74.251191][ T9186] ? vprintk_func+0x86/0x189 [ 74.255771][ T9186] ? umount_check.cold+0xe9/0x10a [ 74.260778][ T9186] d_walk+0x194/0x950 [ 74.264740][ T9186] ? select_collect+0x420/0x420 [ 74.269578][ T9186] do_one_tree+0x28/0x40 [ 74.273802][ T9186] shrink_dcache_for_umount+0x72/0x170 [ 74.279243][ T9186] generic_shutdown_super+0x6d/0x370 [ 74.284523][ T9186] kill_anon_super+0x3e/0x60 [ 74.289090][ T9186] kernfs_kill_sb+0x165/0x1e3 [ 74.293757][ T9186] sysfs_kill_sb+0x23/0x40 [ 74.298162][ T9186] deactivate_locked_super+0x95/0x100 [ 74.303515][ T9186] deactivate_super+0x1b2/0x1d0 [ 74.308344][ T9186] ? mount_ns+0x1d0/0x1d0 [ 74.312650][ T9186] ? dput+0x38/0x690 [ 74.316523][ T9186] ? dput+0x1e6/0x690 [ 74.320487][ T9186] cleanup_mnt+0xbf/0x160 [ 74.324796][ T9186] __cleanup_mnt+0x16/0x20 [ 74.329451][ T9186] task_work_run+0x145/0x1c0 [ 74.334045][ T9186] exit_to_usermode_loop+0x273/0x2c0 [ 74.339311][ T9186] do_syscall_64+0x58e/0x680 [ 74.343907][ T9186] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.349775][ T9186] RIP: 0033:0x400e80 [ 74.353649][ T9186] Code: 01 f0 ff ff 0f 83 20 0c 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 4d 18 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f4 0b 00 00 c3 48 83 ec 08 e8 5a 01 00 00 [ 74.373231][ T9186] RSP: 002b:00007ffcf4a007e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 74.381634][ T9186] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000400e80 [ 74.389586][ T9186] RDX: 00000000004409b9 RSI: 0000000000000000 RDI: 0000000000000004 [ 74.397538][ T9186] RBP: 00000000004a2190 R08: 0000000000000100 R09: 0000000000000100 [ 74.405489][ T9186] R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000401f00 [ 74.413436][ T9186] R13: 0000000000401f90 R14: 0000000000000000 R15: 0000000000000000 [ 74.422616][ T9186] Kernel Offset: disabled [ 74.427044][ T9186] Rebooting in 86400 seconds..