2017/11/03 14:51:01 parsed 1 programs 2017/11/03 14:51:01 executed programs: 0 syzkaller login: [ 25.712109] ------------[ cut here ]------------ [ 25.712789] WARNING: CPU: 0 PID: 3049 at kernel/kthread.c:87 free_kthread_struct+0xa2/0xe0 [ 25.714058] Kernel panic - not syncing: panic_on_warn set ... [ 25.714058] [ 25.715062] CPU: 0 PID: 3049 Comm: syz-executor4 Not tainted 4.14.0-rc7-next-20171103+ #10 [ 25.716156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 [ 25.717230] Call Trace: [ 25.717577] [ 25.717878] dump_stack+0x194/0x257 [ 25.718376] ? arch_local_irq_restore+0x53/0x53 [ 25.719089] ? vsnprintf+0x1ed/0x1900 [ 25.719620] panic+0x1e4/0x41c [ 25.720043] ? refcount_error_report+0x214/0x214 [ 25.721013] ? show_regs_print_info+0x65/0x65 [ 25.721629] ? __warn+0x1a9/0x1e0 [ 25.722087] ? free_kthread_struct+0xa2/0xe0 [ 25.722643] __warn+0x1c4/0x1e0 [ 25.723106] ? free_kthread_struct+0xa2/0xe0 [ 25.723690] report_bug+0x211/0x2d0 [ 25.724190] fixup_bug+0x40/0x90 [ 25.724641] do_trap+0x260/0x390 [ 25.725109] do_error_trap+0x120/0x390 [ 25.725612] ? save_stack+0xa3/0xd0 [ 25.726095] ? do_trap+0x390/0x390 [ 25.726588] ? free_kthread_struct+0xa2/0xe0 [ 25.727284] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.727978] do_invalid_op+0x1b/0x20 [ 25.728494] invalid_op+0x18/0x20 [ 25.728945] RIP: 0010:free_kthread_struct+0xa2/0xe0 [ 25.729576] RSP: 0018:ffff88003ec07768 EFLAGS: 00010206 [ 25.730252] RAX: ffff88006b69a440 RBX: ffff88003d77ccc0 RCX: ffffffff814937d2 [ 25.731220] RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88003d77ce48 [ 25.732142] RBP: ffff88003ec07770 R08: 0000000000000000 R09: 1ffff10007d80ed4 [ 25.733039] R10: ffff88006b69a440 R11: 0000000000000002 R12: 1ffff10007d80ef0 [ 25.733948] R13: 1ffff10007d80ef4 R14: 0000000000000000 R15: ffff88003ec077e0 [ 25.734958] ? free_kthread_struct+0xa2/0xe0 [ 25.735538] ? free_kthread_struct+0xa2/0xe0 [ 25.736170] free_task+0x134/0x1a0 [ 25.736628] ? arch_release_task_struct+0x10/0x10 [ 25.737273] ? atomic_notifier_call_chain+0xb9/0x140 [ 25.737940] __put_task_struct+0x229/0x3b0 [ 25.738503] ? free_task+0x1a0/0x1a0 [ 25.739044] delayed_put_task_struct+0xca/0x3d0 [ 25.739689] ? child_wait_callback+0x210/0x210 [ 25.740307] ? task_active_pid_ns+0xd0/0xd0 [ 25.740922] ? rcu_process_callbacks+0x115c/0x17d0 [ 25.741570] ? put_pid+0x1f0/0x1f0 [ 25.742050] ? child_wait_callback+0x210/0x210 [ 25.743032] rcu_process_callbacks+0xd74/0x17d0 [ 25.743695] ? rcu_gp_kthread+0x18e0/0x18e0 [ 25.744273] ? print_usage_bug+0x480/0x480 [ 25.744872] ? find_held_lock+0x39/0x1d0 [ 25.745423] ? check_noncircular+0x20/0x20 [ 25.745969] ? lock_downgrade+0x990/0x990 [ 25.746553] ? lock_acquire+0x1d5/0x580 [ 25.747142] ? clockevents_program_event+0x163/0x2e0 [ 25.747858] ? __lock_is_held+0xbc/0x140 [ 25.748437] __do_softirq+0x29d/0xbb2 [ 25.748959] ? __irqentry_text_end+0x4/0x4 [ 25.749518] ? do_raw_spin_trylock+0x190/0x190 [ 25.750114] ? do_timer+0x50/0x50 [ 25.750575] ? native_apic_msr_write+0x5c/0x80 [ 25.751471] ? lapic_next_event+0x54/0x80 [ 25.752025] ? clockevents_program_event+0x108/0x2e0 [ 25.752698] ? tick_program_event+0x7f/0xd0 [ 25.753286] ? __lock_is_held+0xbc/0x140 [ 25.753843] irq_exit+0x1d3/0x210 [ 25.754328] smp_apic_timer_interrupt+0x16b/0x700 [ 25.755244] ? smp_reschedule_interrupt+0xe6/0x670 [ 25.755900] ? smp_call_function_single_interrupt+0x640/0x640 [ 25.756684] ? _raw_spin_lock+0x32/0x40 [ 25.757240] ? handle_edge_irq+0x2b4/0x7c0 [ 25.757821] ? task_prio+0x40/0x40 [ 25.758325] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.759104] ? remove_vma+0x162/0x1b0 [ 25.759593] apic_timer_interrupt+0x9d/0xb0 [ 25.760148] [ 25.760449] RIP: 0010:kmem_cache_free+0x170/0x280 [ 25.761076] RSP: 0018:ffff880069967a18 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11 [ 25.762072] RAX: 0000000000000007 RBX: ffff88006d39f250 RCX: 0000000000000006 [ 25.763349] RDX: 0000000000000000 RSI: 1ffff1000d6d359d RDI: 0000000000000286 [ 25.764295] RBP: ffff880069967a38 R08: 0000000000000001 R09: 0000000000000000 [ 25.765208] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88006d831c40 [ 25.766133] R13: 0000000000000286 R14: ffffffff819b8582 R15: dffffc0000000000 [ 25.767138] ? remove_vma+0x162/0x1b0 [ 25.767684] remove_vma+0x162/0x1b0 [ 25.768170] do_munmap+0x82a/0xdf0 [ 25.768665] mmap_region+0x59e/0x15a0 [ 25.769183] ? SyS_brk+0x6f0/0x6f0 [ 25.769621] ? arch_get_unmapped_area_topdown+0xba/0x8a0 [ 25.770311] ? avc_ss_reset+0x110/0x110 [ 25.770909] ? arch_get_unmapped_area+0x750/0x750 [ 25.771519] ? lock_acquire+0x1d5/0x580 [ 25.772034] ? vm_mmap_pgoff+0x198/0x280 [ 25.772556] ? selinux_mmap_addr+0x1f/0xf0 [ 25.773109] ? security_mmap_addr+0x79/0xa0 [ 25.773675] ? get_unmapped_area+0x265/0x300 [ 25.774264] do_mmap+0x6a1/0xd50 [ 25.775036] ? mmap_region+0x15a0/0x15a0 [ 25.775555] ? vm_mmap_pgoff+0x198/0x280 [ 25.776083] ? down_read_killable+0x180/0x180 [ 25.776700] ? security_mmap_file+0x143/0x180 [ 25.777304] vm_mmap_pgoff+0x1de/0x280 [ 25.777850] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.778505] ? selinux_capable+0x40/0x40 [ 25.779138] ? SyS_futex+0x269/0x390 [ 25.779654] SyS_mmap_pgoff+0x23b/0x5f0 [ 25.780196] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.780827] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.781488] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.782135] SyS_mmap+0x16/0x20 [ 25.782577] entry_SYSCALL_64_fastpath+0x1f/0xbe [ 25.783344] RIP: 0033:0x447c89 [ 25.783768] RSP: 002b:00007f68cd277bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 25.785085] RAX: ffffffffffffffda RBX: 00007f68cd2786cc RCX: 0000000000447c89 [ 25.786052] RDX: 0000000000000003 RSI: 0000000000fff000 RDI: 0000000020000000 [ 25.787036] RBP: 0000000000000086 R08: ffffffffffffffff R09: 0000000000000000 [ 25.787981] R10: 0000000000000032 R11: 0000000000000246 R12: 0000000000000000 [ 25.788940] R13: 0000000000000000 R14: 00007f68cd2789c0 R15: 00007f68cd278700 [ 25.790121] Dumping ftrace buffer: [ 25.790510] (ftrace buffer empty) [ 25.790982] Kernel Offset: disabled [ 25.791457] Rebooting in 86400 seconds..