[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 41.336431][ T26] audit: type=1800 audit(1554948325.238:25): pid=7871 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 41.355724][ T26] audit: type=1800 audit(1554948325.238:26): pid=7871 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 41.377042][ T26] audit: type=1800 audit(1554948325.238:27): pid=7871 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 '10.128.0.125' (ECDSA) to the list of known hosts. 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 syzkaller login: [ 67.335522][ T8065] ------------[ cut here ]------------ [ 67.353318][ T8065] sysfs group 'power' not found for kobject 'rfkill28' [ 67.365714][ T8065] WARNING: CPU: 0 PID: 8065 at fs/sysfs/group.c:254 sysfs_remove_group+0x15b/0x1b0 [ 67.367117][ T8071] kobject: 'rfkill31' (00000000eaba623a): calling ktype release [ 67.375042][ T8065] Kernel panic - not syncing: panic_on_warn set ... [ 67.375059][ T8065] CPU: 0 PID: 8065 Comm: syz-executor587 Not tainted 5.1.0-rc4+ #62 [ 67.375066][ T8065] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.375070][ T8065] Call Trace: [ 67.375094][ T8065] dump_stack+0x172/0x1f0 [ 67.375109][ T8065] ? sysfs_remove_group+0x70/0x1b0 [ 67.375124][ T8065] panic+0x2cb/0x65c [ 67.375137][ T8065] ? __warn_printk+0xf3/0xf3 [ 67.375154][ T8065] ? sysfs_remove_group+0x15b/0x1b0 [ 67.375166][ T8065] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.375180][ T8065] ? __warn.cold+0x5/0x45 [ 67.375192][ T8065] ? __warn+0xe8/0x1d0 [ 67.375205][ T8065] ? sysfs_remove_group+0x15b/0x1b0 [ 67.375219][ T8065] __warn.cold+0x20/0x45 [ 67.375232][ T8065] ? sysfs_remove_group+0x15b/0x1b0 [ 67.375247][ T8065] report_bug+0x263/0x2b0 [ 67.375266][ T8065] do_error_trap+0x11b/0x200 [ 67.375284][ T8065] do_invalid_op+0x37/0x50 [ 67.375296][ T8065] ? sysfs_remove_group+0x15b/0x1b0 [ 67.375310][ T8065] invalid_op+0x14/0x20 [ 67.375324][ T8065] RIP: 0010:sysfs_remove_group+0x15b/0x1b0 [ 67.375346][ T8065] Code: 48 89 d9 49 8b 55 00 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 41 48 8b 33 48 c7 c7 60 ca 77 87 e8 e3 82 6c ff <0f> 0b eb 92 e8 bc dd d1 ff e9 d0 fe ff ff 48 89 df e8 af dd d1 ff [ 67.385894][ T8071] kobject: 'rfkill31': free name [ 67.389613][ T8065] RSP: 0018:ffff888098e97ac8 EFLAGS: 00010282 [ 67.389626][ T8065] RAX: 0000000000000000 RBX: ffffffff87bd1e80 RCX: 0000000000000000 [ 67.389634][ T8065] RDX: 0000000000000000 RSI: ffffffff815affc6 RDI: ffffed10131d2f4b [ 67.389642][ T8065] RBP: ffff888098e97af0 R08: ffff888092f4e080 R09: ffffed1015d05011 [ 67.389659][ T8065] R10: ffffed1015d05010 R11: ffff8880ae828087 R12: 0000000000000000 [ 67.398934][ T8069] kobject: 'hci6' (00000000bef8483d): kobject_uevent_env [ 67.407719][ T8065] R13: ffff88809fbed470 R14: ffffffff87bd2420 R15: ffffffff84f456d0 [ 67.407742][ T8065] ? vhci_close_dev+0x50/0x50 [ 67.407764][ T8065] ? vprintk_func+0x86/0x189 [ 67.407782][ T8065] ? sysfs_remove_group+0x15b/0x1b0 [ 67.407800][ T8065] dpm_sysfs_remove+0xa6/0xc0 [ 67.407816][ T8065] device_del+0x184/0xc40 [ 67.407835][ T8065] ? __device_links_no_driver+0x250/0x250 [ 67.407855][ T8065] ? vhci_close_dev+0x50/0x50 [ 67.412054][ T8069] kobject: 'hci6' (00000000bef8483d): fill_kobj_path: path = '/devices/virtual/bluetooth/hci6' [ 67.415664][ T8065] rfkill_unregister+0xd1/0x2c0 [ 67.415689][ T8065] ? vhci_close_dev+0x50/0x50 [ 67.415711][ T8065] hci_unregister_dev+0x287/0x820 [ 67.424249][ T8069] kobject: 'hci6' (00000000bef8483d): kobject_cleanup, parent (null) [ 67.424808][ T8065] ? vhci_close_dev+0x50/0x50 [ 67.429445][ T8069] kobject: 'hci6' (00000000bef8483d): calling ktype release [ 67.434570][ T8065] vhci_release+0x76/0xf0 [ 67.434596][ T8065] __fput+0x2e5/0x8d0 [ 67.434614][ T8065] ____fput+0x16/0x20 [ 67.434628][ T8065] task_work_run+0x14a/0x1c0 [ 67.434645][ T8065] do_exit+0x90a/0x2fa0 [ 67.434660][ T8065] ? __do_page_fault+0x623/0xda0 [ 67.434691][ T8065] ? mm_update_next_owner+0x640/0x640 [ 67.441653][ T8069] kobject: 'hci6': free name [ 67.445269][ T8065] ? kasan_check_write+0x14/0x20 [ 67.445287][ T8065] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.445306][ T8065] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.459756][ T8073] kobject: 'hci3' (000000004a7eaccd): kobject_uevent_env [ 67.464166][ T8065] do_group_exit+0x135/0x370 [ 67.464184][ T8065] __x64_sys_exit_group+0x44/0x50 [ 67.464199][ T8065] do_syscall_64+0x103/0x610 [ 67.464216][ T8065] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.464227][ T8065] RIP: 0033:0x43fed8 [ 67.464241][ T8065] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 67.464247][ T8065] RSP: 002b:00007ffc415caa28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 67.464260][ T8065] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043fed8 [ 67.464275][ T8065] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 67.469717][ T8073] kobject: 'hci3' (000000004a7eaccd): fill_kobj_path: path = '/devices/virtual/bluetooth/hci3' [ 67.473281][ T8065] RBP: 00000000004bf710 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 67.473290][ T8065] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001 [ 67.473297][ T8065] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 67.478690][ T8065] Kernel Offset: disabled [ 67.855833][ T8065] Rebooting in 86400 seconds..