[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 54.098160][ T26] audit: type=1800 audit(1569719669.229:25): pid=8607 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.136350][ T26] audit: type=1800 audit(1569719669.229:26): pid=8607 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 54.157694][ T26] audit: type=1800 audit(1569719669.229:27): pid=8607 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 67.311831][ T8762] ------------[ cut here ]------------ [ 67.317428][ T8762] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x90 [ 67.328157][ T8762] WARNING: CPU: 1 PID: 8762 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 67.337604][ T8762] Kernel panic - not syncing: panic_on_warn set ... [ 67.344187][ T8762] CPU: 1 PID: 8762 Comm: syz-executor074 Not tainted 5.3.0+ #0 [ 67.351717][ T8762] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.361763][ T8762] Call Trace: [ 67.365081][ T8762] dump_stack+0x172/0x1f0 [ 67.369401][ T8762] ? debug_print_object+0x150/0x250 [ 67.374579][ T8762] panic+0x2dc/0x755 [ 67.378548][ T8762] ? add_taint.cold+0x16/0x16 [ 67.383232][ T8762] ? __kasan_check_write+0x14/0x20 [ 67.388336][ T8762] ? __warn.cold+0x5/0x4c [ 67.392642][ T8762] ? __warn+0xe7/0x1e0 [ 67.396695][ T8762] ? debug_print_object+0x168/0x250 [ 67.401916][ T8762] __warn.cold+0x20/0x4c [ 67.406154][ T8762] ? debug_print_object+0x168/0x250 [ 67.411340][ T8762] report_bug+0x263/0x2b0 [ 67.415699][ T8762] do_error_trap+0x11b/0x200 [ 67.420282][ T8762] do_invalid_op+0x37/0x50 [ 67.424691][ T8762] ? debug_print_object+0x168/0x250 [ 67.429921][ T8762] invalid_op+0x23/0x30 [ 67.434090][ T8762] RIP: 0010:debug_print_object+0x168/0x250 [ 67.439892][ T8762] Code: dd a0 f5 e6 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd a0 f5 e6 87 48 c7 c7 a0 ea e6 87 e8 00 d8 02 fe <0f> 0b 83 05 73 cc 85 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 67.459498][ T8762] RSP: 0018:ffff88808f6978d8 EFLAGS: 00010086 [ 67.465544][ T8762] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 67.473500][ T8762] RDX: 0000000000000000 RSI: ffffffff815c26d6 RDI: ffffed1011ed2f0d [ 67.481455][ T8762] RBP: ffff88808f697918 R08: ffff8880989b82c0 R09: ffffed1015d24101 [ 67.489424][ T8762] R10: ffffed1015d24100 R11: ffff8880ae920807 R12: 0000000000000001 [ 67.497377][ T8762] R13: ffffffff88fb5940 R14: ffffffff8161e3f0 R15: ffff8880a964c4d0 [ 67.505343][ T8762] ? calc_wheel_index+0x220/0x220 [ 67.510354][ T8762] ? vprintk_func+0x86/0x189 [ 67.514926][ T8762] ? debug_print_object+0x168/0x250 [ 67.520109][ T8762] debug_check_no_obj_freed+0x2d4/0x43f [ 67.525637][ T8762] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.531178][ T8762] kfree+0xf8/0x2c0 [ 67.534969][ T8762] rfcomm_dlc_free+0x20/0x30 [ 67.539540][ T8762] rfcomm_dev_ioctl+0x183e/0x1b80 [ 67.544542][ T8762] ? mark_held_locks+0xa4/0xf0 [ 67.549297][ T8762] ? __local_bh_enable_ip+0x15a/0x270 [ 67.554655][ T8762] ? lock_sock_nested+0xe2/0x120 [ 67.559585][ T8762] ? __local_bh_enable_ip+0x15a/0x270 [ 67.564946][ T8762] ? rfcomm_dev_state_change+0x150/0x150 [ 67.570560][ T8762] ? __local_bh_enable_ip+0x15a/0x270 [ 67.575916][ T8762] rfcomm_sock_ioctl+0x90/0xb0 [ 67.580681][ T8762] sock_do_ioctl+0xd8/0x2f0 [ 67.585177][ T8762] ? compat_ifr_data_ioctl+0x160/0x160 [ 67.590623][ T8762] ? tomoyo_path_number_perm+0x459/0x520 [ 67.596265][ T8762] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 67.602489][ T8762] ? tomoyo_path_number_perm+0x263/0x520 [ 67.608105][ T8762] sock_ioctl+0x3ed/0x780 [ 67.612417][ T8762] ? dlci_ioctl_set+0x40/0x40 [ 67.617089][ T8762] ? __fd_install+0x1bc/0x640 [ 67.621753][ T8762] ? dlci_ioctl_set+0x40/0x40 [ 67.626412][ T8762] do_vfs_ioctl+0xdb6/0x13e0 [ 67.630988][ T8762] ? ioctl_preallocate+0x210/0x210 [ 67.636080][ T8762] ? __kasan_check_read+0x11/0x20 [ 67.641090][ T8762] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.647317][ T8762] ? __fd_install+0x200/0x640 [ 67.651988][ T8762] ? tomoyo_file_ioctl+0x23/0x30 [ 67.656928][ T8762] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.663149][ T8762] ? security_file_ioctl+0x8d/0xc0 [ 67.668251][ T8762] ksys_ioctl+0xab/0xd0 [ 67.672398][ T8762] __x64_sys_ioctl+0x73/0xb0 [ 67.676973][ T8762] do_syscall_64+0xfa/0x760 [ 67.681546][ T8762] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.687476][ T8762] RIP: 0033:0x441229 [ 67.691360][ T8762] 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 [ 67.711406][ T8762] RSP: 002b:00007ffedf2d9dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 67.719819][ T8762] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 67.727798][ T8762] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 67.735764][ T8762] RBP: 00000000000106cb R08: 00000000004002c8 R09: 00000000004002c8 [ 67.743738][ T8762] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 67.751692][ T8762] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 67.761062][ T8762] Kernel Offset: disabled [ 67.765451][ T8762] Rebooting in 86400 seconds..