[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 90.053239][ T27] audit: type=1800 audit(1577384341.007:25): pid=9131 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 90.073323][ T27] audit: type=1800 audit(1577384341.007:26): pid=9131 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 90.120635][ T27] audit: type=1800 audit(1577384341.017:27): pid=9131 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 '10.128.0.41' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 105.390095][ T9286] ------------[ cut here ]------------ [ 105.395754][ T9286] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 105.406757][ T9286] WARNING: CPU: 0 PID: 9286 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 105.416214][ T9286] Kernel panic - not syncing: panic_on_warn set ... [ 105.422787][ T9286] CPU: 0 PID: 9286 Comm: syz-executor334 Not tainted 5.5.0-rc2-syzkaller #0 [ 105.431500][ T9286] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.441561][ T9286] Call Trace: [ 105.444846][ T9286] dump_stack+0x197/0x210 [ 105.449178][ T9286] ? debug_print_object+0xa0/0x250 [ 105.454278][ T9286] panic+0x2e3/0x75c [ 105.458155][ T9286] ? add_taint.cold+0x16/0x16 [ 105.462819][ T9286] ? __kasan_check_write+0x14/0x20 [ 105.467930][ T9286] ? __warn.cold+0x14/0x3e [ 105.472343][ T9286] ? __warn+0xd9/0x1cf [ 105.476407][ T9286] ? debug_print_object+0x168/0x250 [ 105.481589][ T9286] __warn.cold+0x2f/0x3e [ 105.485831][ T9286] ? debug_print_object+0x168/0x250 [ 105.491099][ T9286] report_bug+0x289/0x300 [ 105.495425][ T9286] do_error_trap+0x11b/0x200 [ 105.500272][ T9286] do_invalid_op+0x37/0x50 [ 105.504695][ T9286] ? debug_print_object+0x168/0x250 [ 105.509887][ T9286] invalid_op+0x23/0x30 [ 105.514030][ T9286] RIP: 0010:debug_print_object+0x168/0x250 [ 105.519822][ T9286] Code: dd 20 14 70 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 20 14 70 88 48 c7 c7 80 09 70 88 e8 97 8b b2 fd <0f> 0b 83 05 63 83 e6 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 105.539422][ T9286] RSP: 0018:ffffc90001da78b8 EFLAGS: 00010082 [ 105.545485][ T9286] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 105.554065][ T9286] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff520003b4f09 [ 105.562046][ T9286] RBP: ffffc90001da78f8 R08: ffff8880a7a38380 R09: ffffed1015d045c9 [ 105.570037][ T9286] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 105.578020][ T9286] R13: ffffffff899afae0 R14: ffffffff81645b00 R15: ffff8880a24453f0 [ 105.586090][ T9286] ? calc_wheel_index+0x220/0x220 [ 105.591125][ T9286] ? vprintk_func+0x86/0x189 [ 105.595740][ T9286] ? debug_print_object+0x168/0x250 [ 105.600951][ T9286] debug_check_no_obj_freed+0x2d4/0x43f [ 105.606512][ T9286] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 105.612064][ T9286] kfree+0xf8/0x2c0 [ 105.616019][ T9286] rfcomm_dlc_free+0x20/0x30 [ 105.620605][ T9286] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 105.625749][ T9286] ? mark_held_locks+0xa4/0xf0 [ 105.630515][ T9286] ? lock_sock_nested+0xe2/0x120 [ 105.635558][ T9286] ? rfcomm_tty_install+0x1e0/0x1e0 [ 105.640755][ T9286] ? lock_sock_nested+0x9a/0x120 [ 105.645695][ T9286] ? trace_hardirqs_on+0x67/0x240 [ 105.650726][ T9286] ? __local_bh_enable_ip+0x15a/0x270 [ 105.656127][ T9286] rfcomm_sock_ioctl+0x90/0xb0 [ 105.660895][ T9286] sock_do_ioctl+0xd8/0x2f0 [ 105.665389][ T9286] ? compat_ifr_data_ioctl+0x160/0x160 [ 105.670995][ T9286] ? tomoyo_path_number_perm+0x454/0x520 [ 105.676656][ T9286] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 105.682899][ T9286] ? tomoyo_path_number_perm+0x25e/0x520 [ 105.688549][ T9286] sock_ioctl+0x3ed/0x790 [ 105.692874][ T9286] ? dlci_ioctl_set+0x40/0x40 [ 105.697728][ T9286] ? __fd_install+0x1bc/0x640 [ 105.702412][ T9286] ? dlci_ioctl_set+0x40/0x40 [ 105.707092][ T9286] do_vfs_ioctl+0x977/0x14e0 [ 105.711739][ T9286] ? compat_ioctl_preallocate+0x220/0x220 [ 105.717459][ T9286] ? __kasan_check_read+0x11/0x20 [ 105.722484][ T9286] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.728834][ T9286] ? __fd_install+0x1fb/0x640 [ 105.733629][ T9286] ? tomoyo_file_ioctl+0x23/0x30 [ 105.738574][ T9286] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.744854][ T9286] ? security_file_ioctl+0x8d/0xc0 [ 105.749973][ T9286] ksys_ioctl+0xab/0xd0 [ 105.754132][ T9286] __x64_sys_ioctl+0x73/0xb0 [ 105.758713][ T9286] do_syscall_64+0xfa/0x790 [ 105.763263][ T9286] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.769149][ T9286] RIP: 0033:0x4412b9 [ 105.773031][ T9286] 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 [ 105.792649][ T9286] RSP: 002b:00007ffeb009b0a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 105.801056][ T9286] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 105.809131][ T9286] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 105.817099][ T9286] RBP: 0000000000019b85 R08: 00000000004002c8 R09: 00000000004002c8 [ 105.825075][ T9286] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 105.833040][ T9286] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 105.842704][ T9286] Kernel Offset: disabled [ 105.847145][ T9286] Rebooting in 86400 seconds..