[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.162455][ T27] audit: type=1800 audit(1577384872.572:25): pid=9008 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.182314][ T27] audit: type=1800 audit(1577384872.572:26): pid=9008 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.227638][ T27] audit: type=1800 audit(1577384872.572:27): pid=9008 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 '10.128.1.24' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 96.540293][ T9163] ------------[ cut here ]------------ [ 96.545926][ T9163] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xe0 [ 96.556717][ T9163] WARNING: CPU: 1 PID: 9163 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 96.566159][ T9163] Kernel panic - not syncing: panic_on_warn set ... [ 96.572836][ T9163] CPU: 1 PID: 9163 Comm: syz-executor012 Not tainted 5.5.0-rc3-syzkaller #0 [ 96.581484][ T9163] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.591518][ T9163] Call Trace: [ 96.594794][ T9163] dump_stack+0x197/0x210 [ 96.599148][ T9163] ? debug_print_object+0x80/0x250 [ 96.604277][ T9163] panic+0x2e3/0x75c [ 96.608165][ T9163] ? add_taint.cold+0x16/0x16 [ 96.612830][ T9163] ? __kasan_check_write+0x14/0x20 [ 96.617923][ T9163] ? __warn.cold+0x14/0x3e [ 96.622318][ T9163] ? __warn+0xd9/0x1cf [ 96.626382][ T9163] ? debug_print_object+0x168/0x250 [ 96.631557][ T9163] __warn.cold+0x2f/0x3e [ 96.635780][ T9163] ? debug_print_object+0x168/0x250 [ 96.640956][ T9163] report_bug+0x289/0x300 [ 96.645267][ T9163] do_error_trap+0x11b/0x200 [ 96.649840][ T9163] do_invalid_op+0x37/0x50 [ 96.654251][ T9163] ? debug_print_object+0x168/0x250 [ 96.659455][ T9163] invalid_op+0x23/0x30 [ 96.663592][ T9163] RIP: 0010:debug_print_object+0x168/0x250 [ 96.669390][ T9163] 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 77 8a b2 fd <0f> 0b 83 05 03 80 e6 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 96.688976][ T9163] RSP: 0018:ffffc90001ac78b8 EFLAGS: 00010082 [ 96.695031][ T9163] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 96.702980][ T9163] RDX: 0000000000000000 RSI: ffffffff815e8b56 RDI: fffff52000358f09 [ 96.710931][ T9163] RBP: ffffc90001ac78f8 R08: ffff8880961101c0 R09: ffffed1015d245c9 [ 96.718885][ T9163] R10: ffffed1015d245c8 R11: ffff8880ae922e43 R12: 0000000000000001 [ 96.726848][ T9163] R13: ffffffff899afae0 R14: ffffffff81645b00 R15: ffff8880a82432d8 [ 96.734820][ T9163] ? calc_wheel_index+0x220/0x220 [ 96.739841][ T9163] ? vprintk_func+0x86/0x189 [ 96.744473][ T9163] ? debug_print_object+0x168/0x250 [ 96.749679][ T9163] debug_check_no_obj_freed+0x2d4/0x43f [ 96.755212][ T9163] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 96.760784][ T9163] kfree+0xf8/0x2c0 [ 96.764592][ T9163] rfcomm_dlc_free+0x20/0x30 [ 96.769167][ T9163] rfcomm_dev_ioctl+0x1b9d/0x1e80 [ 96.774193][ T9163] ? mark_held_locks+0xa4/0xf0 [ 96.778952][ T9163] ? lock_sock_nested+0xe2/0x120 [ 96.783914][ T9163] ? rfcomm_tty_install+0x1e0/0x1e0 [ 96.789098][ T9163] ? lock_sock_nested+0x9a/0x120 [ 96.794023][ T9163] ? trace_hardirqs_on+0x67/0x240 [ 96.799062][ T9163] ? __local_bh_enable_ip+0x15a/0x270 [ 96.804439][ T9163] rfcomm_sock_ioctl+0x90/0xb0 [ 96.809193][ T9163] sock_do_ioctl+0xd8/0x2f0 [ 96.813703][ T9163] ? compat_ifr_data_ioctl+0x160/0x160 [ 96.819150][ T9163] ? tomoyo_path_number_perm+0x454/0x520 [ 96.824767][ T9163] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 96.830994][ T9163] ? tomoyo_path_number_perm+0x25e/0x520 [ 96.836669][ T9163] sock_ioctl+0x3ed/0x790 [ 96.841037][ T9163] ? dlci_ioctl_set+0x40/0x40 [ 96.845712][ T9163] ? __fd_install+0x1bc/0x640 [ 96.850376][ T9163] ? dlci_ioctl_set+0x40/0x40 [ 96.855070][ T9163] do_vfs_ioctl+0x977/0x14e0 [ 96.859647][ T9163] ? compat_ioctl_preallocate+0x220/0x220 [ 96.865385][ T9163] ? __kasan_check_read+0x11/0x20 [ 96.870395][ T9163] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.876616][ T9163] ? __fd_install+0x1fb/0x640 [ 96.881284][ T9163] ? tomoyo_file_ioctl+0x23/0x30 [ 96.886208][ T9163] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.892430][ T9163] ? security_file_ioctl+0x8d/0xc0 [ 96.897567][ T9163] ksys_ioctl+0xab/0xd0 [ 96.901734][ T9163] __x64_sys_ioctl+0x73/0xb0 [ 96.906321][ T9163] do_syscall_64+0xfa/0x790 [ 96.910826][ T9163] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.916701][ T9163] RIP: 0033:0x4412b9 [ 96.920584][ T9163] 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 [ 96.940184][ T9163] RSP: 002b:00007ffc4f2856c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 96.948602][ T9163] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412b9 [ 96.956575][ T9163] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 96.964545][ T9163] RBP: 00000000000178db R08: 00000000004002c8 R09: 00000000004002c8 [ 96.972515][ T9163] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004020e0 [ 96.980481][ T9163] R13: 0000000000402170 R14: 0000000000000000 R15: 0000000000000000 [ 96.990272][ T9163] Kernel Offset: disabled [ 96.994679][ T9163] Rebooting in 86400 seconds..