[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.402471][ T26] audit: type=1800 audit(1577520117.400:25): pid=9093 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.425832][ T26] audit: type=1800 audit(1577520117.400:26): pid=9093 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 73.481909][ T26] audit: type=1800 audit(1577520117.400:27): pid=9093 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 '10.128.0.62' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 89.403487][ T9247] ------------[ cut here ]------------ [ 89.409162][ T9247] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 89.419984][ T9247] WARNING: CPU: 0 PID: 9247 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 89.430009][ T9247] Kernel panic - not syncing: panic_on_warn set ... [ 89.436599][ T9247] CPU: 0 PID: 9247 Comm: syz-executor006 Not tainted 5.5.0-rc3-syzkaller #0 [ 89.445616][ T9247] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.456795][ T9247] Call Trace: [ 89.460073][ T9247] dump_stack+0x197/0x210 [ 89.464388][ T9247] ? debug_print_object+0x90/0x250 [ 89.469492][ T9247] panic+0x2e3/0x75c [ 89.473374][ T9247] ? add_taint.cold+0x16/0x16 [ 89.478035][ T9247] ? __kasan_check_write+0x14/0x20 [ 89.483131][ T9247] ? __warn.cold+0x14/0x3e [ 89.487526][ T9247] ? __warn+0xd9/0x1cf [ 89.491781][ T9247] ? debug_print_object+0x168/0x250 [ 89.500010][ T9247] __warn.cold+0x2f/0x3e [ 89.504235][ T9247] ? debug_print_object+0x168/0x250 [ 89.509431][ T9247] report_bug+0x289/0x300 [ 89.513742][ T9247] do_error_trap+0x11b/0x200 [ 89.518310][ T9247] do_invalid_op+0x37/0x50 [ 89.522713][ T9247] ? debug_print_object+0x168/0x250 [ 89.527895][ T9247] invalid_op+0x23/0x30 [ 89.532117][ T9247] RIP: 0010:debug_print_object+0x168/0x250 [ 89.537905][ T9247] Code: dd 80 14 70 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 80 14 70 88 48 c7 c7 e0 09 70 88 e8 87 80 b2 fd <0f> 0b 83 05 13 76 e6 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 89.558535][ T9247] RSP: 0018:ffffc900020178b8 EFLAGS: 00010082 [ 89.565725][ T9247] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 89.573761][ T9247] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff52000402f09 [ 89.581712][ T9247] RBP: ffffc900020178f8 R08: ffff8880a3edc440 R09: ffffed1015d045c9 [ 89.589759][ T9247] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 89.597710][ T9247] R13: ffffffff899afae0 R14: ffffffff81645b00 R15: ffff8880929a7ee0 [ 89.605792][ T9247] ? calc_wheel_index+0x220/0x220 [ 89.610849][ T9247] ? vprintk_func+0x86/0x189 [ 89.615526][ T9247] ? debug_print_object+0x168/0x250 [ 89.620720][ T9247] debug_check_no_obj_freed+0x2d4/0x43f [ 89.626258][ T9247] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 89.631792][ T9247] kfree+0xf8/0x2c0 [ 89.635604][ T9247] rfcomm_dlc_free+0x20/0x30 [ 89.640619][ T9247] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 89.645648][ T9247] ? mark_held_locks+0xa4/0xf0 [ 89.650408][ T9247] ? lock_sock_nested+0xe2/0x120 [ 89.655410][ T9247] ? rfcomm_tty_install+0x1e0/0x1e0 [ 89.660604][ T9247] ? lock_sock_nested+0x9a/0x120 [ 89.665706][ T9247] ? trace_hardirqs_on+0x67/0x240 [ 89.670721][ T9247] ? __local_bh_enable_ip+0x15a/0x270 [ 89.676085][ T9247] rfcomm_sock_ioctl+0x90/0xb0 [ 89.680994][ T9247] sock_do_ioctl+0xd8/0x2f0 [ 89.685496][ T9247] ? compat_ifr_data_ioctl+0x160/0x160 [ 89.690981][ T9247] ? tomoyo_path_number_perm+0x454/0x520 [ 89.696606][ T9247] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 89.702920][ T9247] ? tomoyo_path_number_perm+0x25e/0x520 [ 89.708617][ T9247] sock_ioctl+0x3ed/0x790 [ 89.712976][ T9247] ? dlci_ioctl_set+0x40/0x40 [ 89.717640][ T9247] ? __fd_install+0x1bc/0x640 [ 89.722390][ T9247] ? dlci_ioctl_set+0x40/0x40 [ 89.727061][ T9247] do_vfs_ioctl+0x977/0x14e0 [ 89.731636][ T9247] ? compat_ioctl_preallocate+0x220/0x220 [ 89.737341][ T9247] ? __kasan_check_read+0x11/0x20 [ 89.742350][ T9247] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.748587][ T9247] ? __fd_install+0x1fb/0x640 [ 89.753258][ T9247] ? tomoyo_file_ioctl+0x23/0x30 [ 89.758173][ T9247] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.764391][ T9247] ? security_file_ioctl+0x8d/0xc0 [ 89.769480][ T9247] ksys_ioctl+0xab/0xd0 [ 89.773622][ T9247] __x64_sys_ioctl+0x73/0xb0 [ 89.778192][ T9247] do_syscall_64+0xfa/0x790 [ 89.782688][ T9247] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.788560][ T9247] RIP: 0033:0x4412b9 [ 89.792968][ T9247] 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 [ 89.812566][ T9247] RSP: 002b:00007fff234f8d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 89.820971][ T9247] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 89.828965][ T9247] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 89.836935][ T9247] RBP: 0000000000015d00 R08: 00000000004002c8 R09: 00000000004002c8 [ 89.844957][ T9247] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 89.853062][ T9247] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 89.862574][ T9247] Kernel Offset: disabled [ 89.868521][ T9247] Rebooting in 86400 seconds..