[ 40.918574][ T26] audit: type=1800 audit(1571431349.391:26): pid=7762 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.943694][ T26] audit: type=1800 audit(1571431349.391:27): pid=7762 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 40.968815][ T26] audit: type=1800 audit(1571431349.391:28): pid=7762 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 41.680898][ T26] audit: type=1800 audit(1571431350.191:29): pid=7762 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 56.416619][ T7915] ------------[ cut here ]------------ [ 56.422327][ T7915] ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0x80 [ 56.432943][ T7915] WARNING: CPU: 0 PID: 7915 at lib/debugobjects.c:484 debug_check_no_obj_freed+0x464/0x5b0 [ 56.442916][ T7915] Kernel panic - not syncing: panic_on_warn set ... [ 56.452697][ T7915] CPU: 0 PID: 7915 Comm: syz-executor252 Not tainted 5.4.0-rc3+ #0 [ 56.460562][ T7915] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.470615][ T7915] Call Trace: [ 56.473889][ T7915] dump_stack+0x1d8/0x2f8 [ 56.482930][ T7915] panic+0x264/0x7a9 [ 56.486814][ T7915] ? __warn+0x105/0x210 [ 56.490986][ T7915] ? debug_check_no_obj_freed+0x464/0x5b0 [ 56.496686][ T7915] __warn+0x20e/0x210 [ 56.500650][ T7915] ? debug_check_no_obj_freed+0x464/0x5b0 [ 56.506350][ T7915] report_bug+0x1b6/0x2f0 [ 56.516048][ T7915] ? debug_check_no_obj_freed+0x464/0x5b0 [ 56.527416][ T7915] do_error_trap+0xd7/0x440 [ 56.531915][ T7915] do_invalid_op+0x36/0x40 [ 56.536487][ T7915] ? debug_check_no_obj_freed+0x464/0x5b0 [ 56.542361][ T7915] invalid_op+0x23/0x30 [ 56.551447][ T7915] RIP: 0010:debug_check_no_obj_freed+0x464/0x5b0 [ 56.557748][ T7915] Code: 08 48 89 df e8 7d fe 63 fe 4c 8b 03 48 c7 c7 be c3 40 88 48 c7 c6 ab c4 3e 88 4c 89 e2 44 89 f9 4d 89 e9 31 c0 e8 7c 5f fd fd <0f> 0b 4c 8b 6d a8 ff 05 94 14 76 05 49 83 c5 30 4c 89 e8 48 c1 e8 [ 56.577328][ T7915] RSP: 0018:ffff88809546fb78 EFLAGS: 00010046 [ 56.583383][ T7915] RAX: a75df6cb25121200 RBX: ffffffff888d7c20 RCX: ffff88809e76c040 [ 56.591334][ T7915] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 56.599285][ T7915] RBP: ffff88809546fc10 R08: ffffffff815c8244 R09: ffffed1015d440d2 [ 56.607232][ T7915] R10: ffffed1015d440d2 R11: 0000000000000000 R12: ffffffff8844542a [ 56.615194][ T7915] R13: ffffffff86c03ad0 R14: dffffc0000000000 R15: 0000000000000000 [ 56.623153][ T7915] ? rfcomm_dlc_alloc+0x3a0/0x3a0 [ 56.628157][ T7915] ? vprintk_emit+0x2d4/0x3a0 [ 56.632818][ T7915] ? debug_check_no_obj_freed+0x464/0x5b0 [ 56.638536][ T7915] ? rfcomm_dlc_free+0x1e/0x30 [ 56.643297][ T7915] kfree+0x107/0x200 [ 56.647167][ T7915] rfcomm_dlc_free+0x1e/0x30 [ 56.651732][ T7915] rfcomm_dev_ioctl+0xb9a/0x1c70 [ 56.656644][ T7915] ? __local_bh_enable_ip+0x13a/0x240 [ 56.662020][ T7915] rfcomm_sock_ioctl+0x7e/0xa0 [ 56.666792][ T7915] sock_do_ioctl+0x7c/0x260 [ 56.671279][ T7915] sock_ioctl+0x461/0x680 [ 56.675587][ T7915] ? sock_poll+0x310/0x310 [ 56.679981][ T7915] do_vfs_ioctl+0x744/0x1730 [ 56.684550][ T7915] ? assoc_array_gc+0x1371/0x1440 [ 56.689555][ T7915] ? tomoyo_file_ioctl+0x23/0x30 [ 56.694483][ T7915] ? security_file_ioctl+0xa1/0xd0 [ 56.699580][ T7915] __x64_sys_ioctl+0xe3/0x120 [ 56.704232][ T7915] do_syscall_64+0xf7/0x1c0 [ 56.708713][ T7915] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 56.714580][ T7915] RIP: 0033:0x441229 [ 56.718447][ T7915] 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 [ 56.738042][ T7915] RSP: 002b:00007ffd79e793f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 56.746444][ T7915] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441229 [ 56.754393][ T7915] RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 [ 56.762601][ T7915] RBP: 000000000000dc3b R08: 00000000004002c8 R09: 00000000004002c8 [ 56.770554][ T7915] R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000402050 [ 56.778504][ T7915] R13: 00000000004020e0 R14: 0000000000000000 R15: 0000000000000000 [ 56.788125][ T7915] Kernel Offset: disabled [ 56.792503][ T7915] Rebooting in 86400 seconds..