[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 70.311550][ T27] audit: type=1800 audit(1577967174.663:25): pid=9331 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 70.344789][ T27] audit: type=1800 audit(1577967174.663:26): pid=9331 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 70.384652][ T27] audit: type=1800 audit(1577967174.663:27): pid=9331 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 '10.128.1.34' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 86.755818][ T9487] ------------[ cut here ]------------ [ 86.761453][ T9487] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 86.772289][ T9487] WARNING: CPU: 1 PID: 9487 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 86.781732][ T9487] Kernel panic - not syncing: panic_on_warn set ... [ 86.788324][ T9487] CPU: 1 PID: 9487 Comm: syz-executor730 Not tainted 5.5.0-rc2-next-20191220-syzkaller #0 [ 86.798722][ T9487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.808854][ T9487] Call Trace: [ 86.812134][ T9487] dump_stack+0x197/0x210 [ 86.816458][ T9487] ? debug_print_object+0x110/0x250 [ 86.821643][ T9487] panic+0x2e3/0x75c [ 86.825532][ T9487] ? add_taint.cold+0x16/0x16 [ 86.830192][ T9487] ? __kasan_check_write+0x14/0x20 [ 86.835284][ T9487] ? __warn.cold+0x14/0x3e [ 86.839681][ T9487] ? __warn+0xd9/0x1cf [ 86.843731][ T9487] ? debug_print_object+0x168/0x250 [ 86.848918][ T9487] __warn.cold+0x2f/0x3e [ 86.853145][ T9487] ? debug_print_object+0x168/0x250 [ 86.858326][ T9487] report_bug+0x289/0x300 [ 86.862651][ T9487] do_error_trap+0x11b/0x200 [ 86.867341][ T9487] do_invalid_op+0x37/0x50 [ 86.871745][ T9487] ? debug_print_object+0x168/0x250 [ 86.876942][ T9487] invalid_op+0x23/0x30 [ 86.881182][ T9487] RIP: 0010:debug_print_object+0x168/0x250 [ 86.886985][ T9487] Code: dd c0 24 70 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd c0 24 70 88 48 c7 c7 20 1a 70 88 e8 67 6c b1 fd <0f> 0b 83 05 53 2d ed 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 86.906922][ T9487] RSP: 0018:ffffc900020a7a48 EFLAGS: 00010086 [ 86.912979][ T9487] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 86.920958][ T9487] RDX: 0000000000000000 RSI: ffffffff815e9f66 RDI: fffff52000414f3b [ 86.929186][ T9487] RBP: ffffc900020a7a88 R08: ffff88808de0c600 R09: ffffed1015d245c9 [ 86.937161][ T9487] R10: ffffed1015d245c8 R11: ffff8880ae922e43 R12: 0000000000000001 [ 86.945119][ T9487] R13: ffffffff899ba4a0 R14: ffffffff81648510 R15: ffff8880a89d4888 [ 86.953084][ T9487] ? calc_wheel_index+0x220/0x220 [ 86.958098][ T9487] ? vprintk_func+0x86/0x189 [ 86.962674][ T9487] ? debug_print_object+0x168/0x250 [ 86.967855][ T9487] debug_check_no_obj_freed+0x2d4/0x43f [ 86.973401][ T9487] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 86.978946][ T9487] kfree+0xf8/0x2c0 [ 86.982760][ T9487] rfcomm_dlc_free+0x20/0x30 [ 86.987352][ T9487] rfcomm_dev_ioctl+0x1ba7/0x1e90 [ 86.992361][ T9487] ? mark_held_locks+0xa4/0xf0 [ 86.997108][ T9487] ? __local_bh_enable_ip+0x15a/0x270 [ 87.002461][ T9487] ? rfcomm_tty_install+0x1e0/0x1e0 [ 87.007640][ T9487] ? lock_sock_nested+0x9a/0x120 [ 87.012560][ T9487] ? trace_hardirqs_on+0x67/0x240 [ 87.017567][ T9487] ? __local_bh_enable_ip+0x15a/0x270 [ 87.022924][ T9487] rfcomm_sock_ioctl+0x90/0xb0 [ 87.027670][ T9487] sock_do_ioctl+0xd8/0x2f0 [ 87.032170][ T9487] ? compat_ifr_data_ioctl+0x160/0x160 [ 87.037624][ T9487] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 87.043611][ T9487] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 87.049847][ T9487] ? do_vfs_ioctl+0x11b/0x1340 [ 87.054610][ T9487] ? ioctl_file_clone+0x180/0x180 [ 87.059620][ T9487] sock_ioctl+0x3ed/0x790 [ 87.063964][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.070201][ T9487] ? dlci_ioctl_set+0x40/0x40 [ 87.074863][ T9487] ? tomoyo_file_ioctl+0x23/0x30 [ 87.079877][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 87.086101][ T9487] ? security_file_ioctl+0x8d/0xc0 [ 87.091222][ T9487] ? dlci_ioctl_set+0x40/0x40 [ 87.095888][ T9487] ksys_ioctl+0x123/0x180 [ 87.100217][ T9487] __x64_sys_ioctl+0x73/0xb0 [ 87.104806][ T9487] do_syscall_64+0xfa/0x790 [ 87.109304][ T9487] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.115181][ T9487] RIP: 0033:0x4412b9 [ 87.119069][ T9487] 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 [ 87.138749][ T9487] RSP: 002b:00007ffd3780f388 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 87.147164][ T9487] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 87.155117][ T9487] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 87.163071][ T9487] RBP: 00000000000152d0 R08: 00000000004002c8 R09: 00000000004002c8 [ 87.171048][ T9487] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 87.179000][ T9487] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 87.188478][ T9487] Kernel Offset: disabled [ 87.192862][ T9487] Rebooting in 86400 seconds..