[ 34.825813] audit: type=1800 audit(1539063109.619:24): pid=5903 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.333368] audit: type=1800 audit(1539063110.239:25): pid=5903 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.352717] audit: type=1800 audit(1539063110.239:26): pid=5903 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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 '10.128.0.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.564819] ------------[ cut here ]------------ [ 45.569612] ODEBUG: free active (active state 1) object type: rcu_head hint: (null) [ 45.578451] WARNING: CPU: 0 PID: 6060 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 [ 45.587183] Kernel panic - not syncing: panic_on_warn set ... [ 45.587183] [ 45.594540] CPU: 0 PID: 6060 Comm: syz-executor696 Not tainted 4.19.0-rc7-next-20181008+ #89 [ 45.603091] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.612422] Call Trace: [ 45.614992] dump_stack+0x244/0x3ab [ 45.618608] ? dump_stack_print_info.cold.2+0x52/0x52 [ 45.623787] panic+0x238/0x4e7 [ 45.626961] ? add_taint.cold.5+0x16/0x16 [ 45.631093] ? __warn.cold.8+0x148/0x1ba [ 45.635132] ? __warn.cold.8+0x117/0x1ba [ 45.639174] ? debug_print_object+0x16a/0x210 [ 45.643656] __warn.cold.8+0x163/0x1ba [ 45.647526] ? debug_print_object+0x16a/0x210 [ 45.652019] report_bug+0x254/0x2d0 [ 45.655988] do_error_trap+0x11b/0x200 [ 45.659858] do_invalid_op+0x36/0x40 [ 45.663550] ? debug_print_object+0x16a/0x210 [ 45.668028] invalid_op+0x14/0x20 [ 45.671464] RIP: 0010:debug_print_object+0x16a/0x210 [ 45.676549] Code: 41 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 92 00 00 00 48 8b 14 dd 60 02 41 88 4c 89 fe 48 c7 c7 00 f8 40 88 e8 36 2f b4 fd <0f> 0b 83 05 a9 f4 5e 06 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f [ 45.695434] RSP: 0018:ffff8801d4d16da8 EFLAGS: 00010086 [ 45.700778] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 45.708030] RDX: 0000000000000000 RSI: ffffffff8164d235 RDI: 0000000000000005 [ 45.715285] RBP: ffff8801d4d16de8 R08: ffff8801d53f00c0 R09: ffffed003b5c3eda [ 45.722539] R10: ffffed003b5c3eda R11: ffff8801dae1f6d7 R12: 0000000000000001 [ 45.729793] R13: ffffffff8939a760 R14: 0000000000000000 R15: ffffffff8840fca0 [ 45.737056] ? vprintk_func+0x85/0x181 [ 45.740928] ? debug_print_object+0x16a/0x210 [ 45.745404] debug_check_no_obj_freed+0x3ae/0x58d [ 45.750238] ? debug_object_activate+0x600/0x600 [ 45.754974] ? trace_hardirqs_on+0x310/0x310 [ 45.759367] ? rt_mutex_adjust_prio_chain.cold.15+0x6c/0x6c [ 45.765062] kmem_cache_free+0x202/0x290 [ 45.769107] free_task+0x16e/0x1f0 [ 45.772649] ? arch_release_task_struct+0x10/0x10 [ 45.777479] ? atomic_notifier_call_chain+0xed/0x190 [ 45.782571] __put_task_struct+0x2e6/0x620 [ 45.786788] ? free_task+0x1f0/0x1f0 [ 45.790485] ? free_unref_page+0x960/0x960 [ 45.794703] ? __phys_addr+0xa6/0x120 [ 45.798511] finish_task_switch+0x66c/0x900 [ 45.802821] ? __switch_to_asm+0x40/0x70 [ 45.806867] ? preempt_notifier_register+0x200/0x200 [ 45.811955] ? __switch_to_asm+0x34/0x70 [ 45.816023] ? __switch_to_asm+0x34/0x70 [ 45.820065] ? __switch_to_asm+0x40/0x70 [ 45.824114] ? __switch_to_asm+0x34/0x70 [ 45.828155] ? __switch_to_asm+0x40/0x70 [ 45.832204] ? __switch_to_asm+0x34/0x70 [ 45.836279] ? __switch_to_asm+0x40/0x70 [ 45.840324] ? __switch_to_asm+0x34/0x70 [ 45.844398] ? __switch_to_asm+0x34/0x70 [ 45.848438] ? __switch_to_asm+0x40/0x70 [ 45.852484] ? __switch_to_asm+0x34/0x70 [ 45.856547] ? __switch_to_asm+0x40/0x70 [ 45.860591] ? __switch_to_asm+0x34/0x70 [ 45.864633] ? __switch_to_asm+0x40/0x70 [ 45.868699] __schedule+0x8d7/0x21d0 [ 45.872403] ? __sched_text_start+0x8/0x8 [ 45.876548] ? plist_check_head+0xea/0x150 [ 45.880784] ? plist_check_list+0xa0/0xa0 [ 45.884915] ? __schedule+0x8d7/0x21d0 [ 45.888800] ? plist_add+0x601/0x7a0 [ 45.892517] ? __x2apic_send_IPI_dest+0x5c/0x80 [ 45.897168] ? plist_check_head+0x150/0x150 [ 45.901477] schedule+0xfe/0x460 [ 45.904846] ? lock_downgrade+0x900/0x900 [ 45.908978] ? __schedule+0x21d0/0x21d0 [ 45.912936] ? kasan_check_read+0x11/0x20 [ 45.917067] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.921454] ? do_raw_spin_trylock+0x270/0x270 [ 45.926022] ? lock_acquire+0x1ed/0x520 [ 45.929998] futex_wait_queue_me+0x3f9/0x840 [ 45.934390] ? refill_pi_state_cache.part.8+0x310/0x310 [ 45.939738] ? _raw_spin_unlock_irqrestore+0xbb/0xd0 [ 45.944826] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.950367] ? get_futex_value_locked+0xcb/0xf0 [ 45.955116] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.960117] ? futex_wait_setup+0x266/0x3e0 [ 45.964425] ? futex_wake+0x760/0x760 [ 45.968214] ? futex_wake+0x613/0x760 [ 45.971996] futex_wait+0x45c/0xa50 [ 45.975607] ? futex_wait_setup+0x3e0/0x3e0 [ 45.979998] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 45.985178] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 45.990270] ? futex_wake+0x304/0x760 [ 45.994074] ? kasan_check_write+0x14/0x20 [ 45.998293] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 46.003214] ? radix_tree_insert+0x870/0x870 [ 46.007603] ? wait_for_completion+0x8a0/0x8a0 [ 46.012166] do_futex+0x31a/0x26d0 [ 46.015694] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 46.020628] ? lock_downgrade+0x900/0x900 [ 46.024761] ? exit_robust_list+0x280/0x280 [ 46.029066] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 46.034586] ? ucma_put_ctx+0x39/0x60 [ 46.038379] ? ucma_resolve_ip+0x171/0x2a0 [ 46.042597] ? ucma_query+0xb20/0xb20 [ 46.046402] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.051923] ? _copy_from_user+0xdf/0x150 [ 46.056052] ? ucma_query+0xb20/0xb20 [ 46.059842] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.065365] ? ucma_write+0x12b/0x420 [ 46.069148] ? ucma_open+0x3f0/0x3f0 [ 46.072846] ? check_preemption_disabled+0x48/0x200 [ 46.077853] ? __vfs_write+0x121/0x9f0 [ 46.081728] ? ucma_open+0x3f0/0x3f0 [ 46.085428] ? kernel_read+0x120/0x120 [ 46.089315] ? apparmor_path_rmdir+0x30/0x30 [ 46.093705] ? get_unused_fd_flags+0x1a0/0x1a0 [ 46.098277] ? fsnotify_first_mark+0x350/0x350 [ 46.102861] ? apparmor_file_permission+0x24/0x30 [ 46.107703] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.113235] ? security_file_permission+0x1c2/0x220 [ 46.118236] ? rw_verify_area+0x118/0x360 [ 46.122370] __x64_sys_futex+0x472/0x6a0 [ 46.126425] ? do_futex+0x26d0/0x26d0 [ 46.130318] ? trace_hardirqs_on+0xbd/0x310 [ 46.134621] ? __ia32_sys_read+0xb0/0xb0 [ 46.138668] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.144015] ? trace_hardirqs_off_caller+0x300/0x300 [ 46.149102] ? trace_hardirqs_off+0xb8/0x310 [ 46.153495] do_syscall_64+0x1b9/0x820 [ 46.157365] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.162718] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.167633] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.172636] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.177636] ? __bpf_trace_signal_deliver+0x40/0x40 [ 46.182640] ? __switch_to_asm+0x40/0x70 [ 46.186682] ? __switch_to_asm+0x34/0x70 [ 46.190731] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.195559] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.200731] RIP: 0033:0x446589 [ 46.203905] Code: e8 2c b3 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 46.222790] RSP: 002b:00007f542dee0da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 46.230483] RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 0000000000446589 [ 46.237740] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc58 [ 46.244997] RBP: 00000000006dbc50 R08: 0000000000000000 R09: 0000000000000000 [ 46.252256] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c [ 46.259509] R13: 2f646e6162696e69 R14: 666e692f7665642f R15: 00000000006dbd4c [ 46.267674] Kernel Offset: disabled [ 46.271300] Rebooting in 86400 seconds..