[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.039179][ T26] audit: type=1800 audit(1582897578.307:25): pid=9403 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.068878][ T26] audit: type=1800 audit(1582897578.307:26): pid=9403 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.156928][ T26] audit: type=1800 audit(1582897578.307:27): pid=9403 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 97.864944][ T9559] ------------[ cut here ]------------ [ 97.870675][ T9559] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 97.881441][ T9559] WARNING: CPU: 0 PID: 9559 at lib/debugobjects.c:485 debug_print_object+0x168/0x250 [ 97.890926][ T9559] Kernel panic - not syncing: panic_on_warn set ... [ 97.897494][ T9559] CPU: 0 PID: 9559 Comm: syz-executor307 Not tainted 5.6.0-rc2-next-20200224-syzkaller #0 [ 97.907362][ T9559] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.917399][ T9559] Call Trace: [ 97.920669][ T9559] dump_stack+0x197/0x210 [ 97.924983][ T9559] ? debug_print_object+0xf0/0x250 [ 97.930083][ T9559] panic+0x2e3/0x75c [ 97.933967][ T9559] ? add_taint.cold+0x16/0x16 [ 97.938655][ T9559] ? __kasan_check_write+0x14/0x20 [ 97.943749][ T9559] ? __warn.cold+0x14/0x3e [ 97.948149][ T9559] ? __warn+0xd9/0x1cf [ 97.952202][ T9559] ? debug_print_object+0x168/0x250 [ 97.957380][ T9559] __warn.cold+0x2f/0x3e [ 97.961621][ T9559] ? debug_print_object+0x168/0x250 [ 97.966812][ T9559] report_bug+0x289/0x300 [ 97.971145][ T9559] do_error_trap+0x11b/0x200 [ 97.975719][ T9559] do_invalid_op+0x37/0x50 [ 97.980136][ T9559] ? debug_print_object+0x168/0x250 [ 97.985332][ T9559] invalid_op+0x23/0x30 [ 97.989472][ T9559] RIP: 0010:debug_print_object+0x168/0x250 [ 97.995257][ T9559] Code: dd 00 17 92 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 00 17 92 88 48 c7 c7 60 0c 92 88 e8 57 c1 9d fd <0f> 0b 83 05 73 cb fd 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 98.014987][ T9559] RSP: 0018:ffffc90001fc7a48 EFLAGS: 00010086 [ 98.021031][ T9559] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 98.029096][ T9559] RDX: 0000000000000000 RSI: ffffffff815ee766 RDI: fffff520003f8f3b [ 98.037046][ T9559] RBP: ffffc90001fc7a88 R08: ffff888095ec0180 R09: ffffed1015d045c9 [ 98.045138][ T9559] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 98.053363][ T9559] R13: ffffffff89bb7d60 R14: ffffffff8164d3e0 R15: ffff88809f538ea8 [ 98.061325][ T9559] ? calc_wheel_index+0x220/0x220 [ 98.066400][ T9559] ? vprintk_func+0x86/0x189 [ 98.071068][ T9559] ? debug_print_object+0x168/0x250 [ 98.076292][ T9559] debug_check_no_obj_freed+0x2d6/0x441 [ 98.081824][ T9559] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 98.087366][ T9559] kfree+0xf8/0x2c0 [ 98.091157][ T9559] rfcomm_dlc_free+0x20/0x30 [ 98.095771][ T9559] rfcomm_dev_ioctl+0x1ba7/0x1e90 [ 98.100844][ T9559] ? mark_held_locks+0xa4/0xf0 [ 98.105638][ T9559] ? __local_bh_enable_ip+0x15a/0x270 [ 98.110990][ T9559] ? rfcomm_tty_install+0x1e0/0x1e0 [ 98.116175][ T9559] ? lock_sock_nested+0x9a/0x120 [ 98.121107][ T9559] ? trace_hardirqs_on+0x67/0x240 [ 98.126114][ T9559] ? __local_bh_enable_ip+0x15a/0x270 [ 98.131489][ T9559] rfcomm_sock_ioctl+0x90/0xb0 [ 98.136235][ T9559] sock_do_ioctl+0xd8/0x2f0 [ 98.141067][ T9559] ? compat_ifr_data_ioctl+0x160/0x160 [ 98.146507][ T9559] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 98.152390][ T9559] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 98.158606][ T9559] ? do_vfs_ioctl+0x568/0x13b0 [ 98.163372][ T9559] ? ioctl_file_clone+0x180/0x180 [ 98.168383][ T9559] sock_ioctl+0x3ed/0x790 [ 98.172687][ T9559] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.178906][ T9559] ? dlci_ioctl_set+0x40/0x40 [ 98.183569][ T9559] ? tomoyo_file_ioctl+0x23/0x30 [ 98.188486][ T9559] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.194704][ T9559] ? security_file_ioctl+0x8d/0xc0 [ 98.199793][ T9559] ? dlci_ioctl_set+0x40/0x40 [ 98.204494][ T9559] ksys_ioctl+0x123/0x180 [ 98.208835][ T9559] __x64_sys_ioctl+0x73/0xb0 [ 98.213424][ T9559] do_syscall_64+0xfa/0x790 [ 98.217910][ T9559] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.223781][ T9559] RIP: 0033:0x4412c9 [ 98.227665][ T9559] Code: e8 fc 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 98.247259][ T9559] RSP: 002b:00007ffd59aaef38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 98.255755][ T9559] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 98.263703][ T9559] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000005 [ 98.271686][ T9559] RBP: 0000000000017e1b R08: 00000000004002c8 R09: 00000000004002c8 [ 98.279636][ T9559] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020f0 [ 98.287582][ T9559] R13: 0000000000402180 R14: 0000000000000000 R15: 0000000000000000 [ 98.297030][ T9559] Kernel Offset: disabled [ 98.301411][ T9559] Rebooting in 86400 seconds..