[ 62.708022][ T26] audit: type=1800 audit(1562602555.741:24): pid=9193 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.483017][ T26] audit: type=1800 audit(1562602556.601:25): pid=9193 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.522395][ T26] audit: type=1800 audit(1562602556.601:26): pid=9193 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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 '10.128.10.8' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 99.066102][ T9352] EXT4-fs (sda1): re-mounted. Opts: (null) [ 99.077871][ T9356] EXT4-fs (sda1): re-mounted. Opts: (null) [ 99.086331][ T9353] EXT4-fs (sda1): re-mounted. Opts: (null) [ 99.096573][ T9355] EXT4-fs (sda1): re-mounted. Opts: (null) [ 99.103656][ T9357] EXT4-fs (sda1): re-mounted. Opts: (null) executing program executing program executing program executing program executing program [ 99.115181][ T9354] EXT4-fs (sda1): re-mounted. Opts: (null) [ 99.129831][ T9369] EXT4-fs (sda1): re-mounted. Opts: (null) [ 99.140167][ T9365] EXT4-fs (sda1): re-mounted. Opts: (null) [ 99.152720][ T9366] EXT4-fs (sda1): re-mounted. Opts: (null) executing program executing program executing program executing program [ 99.162347][ T9374] EXT4-fs (sda1): re-mounted. Opts: (null) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 99.551464][ T9350] ------------[ cut here ]------------ [ 99.557299][ T9350] kernel BUG at lib/lockref.c:189! [ 99.562695][ T9350] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 99.569124][ T9350] CPU: 0 PID: 9350 Comm: syz-executor444 Not tainted 5.2.0-next-20190708 #33 [ 99.577946][ T9350] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.588327][ T9350] RIP: 0010:lockref_mark_dead+0x8b/0xa0 [ 99.593981][ T9350] Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 1d c7 43 38 80 ff ff ff 5b 41 5c 5d c3 e8 75 19 38 fe <0f> 0b 48 89 df e8 0b 59 72 fe eb ab e8 a4 59 72 fe eb dc 90 90 55 [ 99.614286][ T9350] RSP: 0018:ffff88809004fc90 EFLAGS: 00010293 [ 99.620544][ T9350] RAX: ffff88808bcc0300 RBX: ffff8880a69b0520 RCX: ffffffff833a3abf [ 99.628690][ T9350] RDX: 0000000000000000 RSI: ffffffff833a3afb RDI: 0000000000000005 [ 99.636681][ T9350] RBP: ffff88809004fca0 R08: ffff88808bcc0300 R09: ffffed1014d360a5 [ 99.644671][ T9350] R10: ffffed1014d360a4 R11: ffff8880a69b0523 R12: 0000000000000000 [ 99.652661][ T9350] R13: ffff8880a69b0520 R14: ffff8880a69b04a0 R15: 0000000000000000 [ 99.660679][ T9350] FS: 000055555571f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 99.669637][ T9350] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.676441][ T9350] CR2: 0000555555738938 CR3: 0000000091be1000 CR4: 00000000001406f0 [ 99.684512][ T9350] Call Trace: [ 99.687826][ T9350] __dentry_kill+0x5f/0x600 [ 99.692386][ T9350] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.698674][ T9350] shrink_dcache_parent+0x2c9/0x3d0 [ 99.703895][ T9350] ? shrink_dcache_sb+0x270/0x270 [ 99.708939][ T9350] ? __kasan_check_read+0x11/0x20 [ 99.713984][ T9350] ? do_raw_spin_unlock+0x57/0x270 [ 99.719124][ T9350] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.725380][ T9350] vfs_rmdir+0x26f/0x4f0 [ 99.729665][ T9350] ? security_path_rmdir+0x110/0x160 [ 99.734986][ T9350] do_rmdir+0x39e/0x420 [ 99.739253][ T9350] ? __ia32_sys_mkdir+0x80/0x80 [ 99.744116][ T9350] ? blkcg_exit_queue+0x30/0x30 [ 99.748992][ T9350] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.754474][ T9350] ? do_syscall_64+0x26/0x6a0 [ 99.759162][ T9350] ? lockdep_hardirqs_on+0x418/0x5d0 [ 99.764465][ T9350] __x64_sys_rmdir+0x36/0x40 [ 99.769072][ T9350] do_syscall_64+0xfd/0x6a0 [ 99.773942][ T9350] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.780006][ T9350] RIP: 0033:0x441917 [ 99.784085][ T9350] Code: 0f 1f 00 b8 57 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 54 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 99.803728][ T9350] RSP: 002b:00007ffe53fc08f8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 99.812250][ T9350] RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000441917 [ 99.820234][ T9350] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe53fc1a90 [ 99.828228][ T9350] RBP: 00000000000024ef R08: 0000000000000000 R09: 0000000000000001 [ 99.836212][ T9350] R10: 0000000000000005 R11: 0000000000000207 R12: 00007ffe53fc1a90 [ 99.844459][ T9350] R13: 00005555557288c0 R14: 0000000000000000 R15: 0000000000000000 [ 99.852445][ T9350] Modules linked in: [ 99.856454][ T9350] ---[ end trace 407254279c8c4b61 ]--- [ 99.861944][ T9350] RIP: 0010:lockref_mark_dead+0x8b/0xa0 [ 99.867618][ T9350] Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 1d c7 43 38 80 ff ff ff 5b 41 5c 5d c3 e8 75 19 38 fe <0f> 0b 48 89 df e8 0b 59 72 fe eb ab e8 a4 59 72 fe eb dc 90 90 55 [ 99.887343][ T9350] RSP: 0018:ffff88809004fc90 EFLAGS: 00010293 [ 99.893467][ T9350] RAX: ffff88808bcc0300 RBX: ffff8880a69b0520 RCX: ffffffff833a3abf [ 99.901458][ T9350] RDX: 0000000000000000 RSI: ffffffff833a3afb RDI: 0000000000000005 [ 99.909521][ T9350] RBP: ffff88809004fca0 R08: ffff88808bcc0300 R09: ffffed1014d360a5 [ 99.917552][ T9350] R10: ffffed1014d360a4 R11: ffff8880a69b0523 R12: 0000000000000000 [ 99.925856][ T9350] R13: ffff8880a69b0520 R14: ffff8880a69b04a0 R15: 0000000000000000 [ 99.933895][ T9350] FS: 000055555571f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 99.943230][ T9350] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.949915][ T9350] CR2: 0000555555738938 CR3: 0000000091be1000 CR4: 00000000001406f0 [ 99.957958][ T9350] Kernel panic - not syncing: Fatal exception [ 99.965295][ T9350] Kernel Offset: disabled [ 99.969661][ T9350] Rebooting in 86400 seconds..