[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.127' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 702.653346] audit: type=1400 audit(1595396370.762:8): avc: denied { execmem } for pid=6335 comm="syz-executor945" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 702.706058] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 702.730766] hrtimer: interrupt took 56700 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 769.156434] random: crng init done [ 769.160022] random: 7 urandom warning(s) missed due to ratelimiting executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1009.840441] ================================================================== [ 1009.848147] BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x131a/0x1700 [ 1009.855517] Read of size 8 at addr ffff8880921c7aa0 by task syz-executor945/29363 [ 1009.863217] [ 1009.864844] CPU: 1 PID: 29363 Comm: syz-executor945 Not tainted 4.14.184-syzkaller #0 [ 1009.873062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1009.882484] Call Trace: [ 1009.885116] [ 1009.887359] dump_stack+0x1b2/0x283 executing program [ 1009.890990] ? unwind_next_frame+0x131a/0x1700 [ 1009.895672] print_address_description.cold+0x54/0x1dc [ 1009.900960] ? unwind_next_frame+0x131a/0x1700 [ 1009.905548] kasan_report.cold+0xa9/0x2b9 [ 1009.909706] unwind_next_frame+0x131a/0x1700 [ 1009.914220] ? retint_kernel+0x2d/0x2d [ 1009.918106] ? deref_stack_reg+0xc0/0xc0 [ 1009.922209] ? check_preemption_disabled+0x35/0x240 [ 1009.927226] ? retint_kernel+0x2d/0x2d [ 1009.931115] perf_callchain_kernel+0x38c/0x520 [ 1009.935699] ? arch_perf_update_userpage+0x300/0x300 executing program [ 1009.940830] ? retint_kernel+0x2d/0x2d [ 1009.944844] ? pcpu_alloc+0x86f/0xf70 [ 1009.948661] ? check_preemption_disabled+0x35/0x240 [ 1009.953764] get_perf_callchain+0x2df/0x740 [ 1009.958101] ? put_callchain_buffers+0x60/0x60 [ 1009.962691] ? __task_pid_nr_ns+0x1ea/0x440 [ 1009.967028] perf_callchain+0x147/0x190 [ 1009.971212] perf_prepare_sample+0x75b/0x1350 [ 1009.975756] ? lock_acquire+0x170/0x3f0 [ 1009.979727] ? perf_output_sample+0x1720/0x1720 [ 1009.984392] ? check_preemption_disabled+0x35/0x240 [ 1009.989419] perf_event_output_forward+0xc9/0x1f0 [ 1009.994263] ? perf_prepare_sample+0x1350/0x1350 [ 1009.999028] ? __lock_acquire+0x655/0x42a0 [ 1010.003270] ? lock_downgrade+0x6e0/0x6e0 [ 1010.007435] ? check_preemption_disabled+0x35/0x240 [ 1010.012475] ? check_preemption_disabled+0x35/0x240 [ 1010.017510] __perf_event_overflow+0x113/0x310 [ 1010.022108] perf_swevent_hrtimer+0x220/0x350 [ 1010.026618] ? __perf_event_overflow+0x310/0x310 [ 1010.031406] ? debug_object_deactivate+0x1cc/0x350 [ 1010.036334] ? lock_acquire+0x170/0x3f0 [ 1010.040295] ? lock_downgrade+0x6e0/0x6e0 [ 1010.044426] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1010.049510] ? debug_object_deactivate+0x1cc/0x350 [ 1010.054514] ? __hrtimer_run_queues+0x205/0xb90 [ 1010.059165] ? lock_downgrade+0x6e0/0x6e0 [ 1010.063311] __hrtimer_run_queues+0x24b/0xb90 [ 1010.067787] ? __perf_event_overflow+0x310/0x310 [ 1010.072522] ? enqueue_hrtimer+0x3a0/0x3a0 [ 1010.076738] hrtimer_interrupt+0x1e6/0x5e0 [ 1010.081010] smp_apic_timer_interrupt+0x117/0x5f0 [ 1010.085836] apic_timer_interrupt+0x93/0xa0 [ 1010.090136] [ 1010.092613] RIP: 0010:lock_acquire+0x97/0x3f0 [ 1010.097096] RSP: 0018:ffff8880921c7930 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 [ 1010.104783] RAX: 1ffffffff0f62cd0 RBX: ffff888088baa2c0 RCX: 0000000000000000 [ 1010.112083] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff888088baab44 [ 1010.119334] RBP: ffffffff87bfa460 R08: 0000000000000001 R09: 0000000000000000 [ 1010.126583] R10: ffff8880921c7b08 R11: 0000000000000000 R12: 0000000000000000 [ 1010.133838] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 1010.141104] pcpu_alloc+0x86f/0xf70 [ 1010.144718] ? __mutex_lock+0xe8/0x1430 [ 1010.148676] ? pcpu_alloc+0x86f/0xf70 [ 1010.152453] ? trace_hardirqs_on+0x10/0x10 [ 1010.156667] ? pcpu_alloc+0x86f/0xf70 [ 1010.160443] ? retint_kernel+0x2d/0x2d [ 1010.164312] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1010.169063] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1010.174494] ? retint_kernel+0x2d/0x2d [ 1010.178397] retint_kernel+0x2d/0x2d [ 1010.182266] RIP: 0000:pcpu_alloc+0x86f/0xf70 [ 1010.186650] RSP: 14000c0:ffff88807c9f0958 EFLAGS: 000001c0 ORIG_RAX: ffffffff8176ab0f [ 1010.194596] RAX: 00000000000001bf RBX: 0000000000000000 RCX: 0000000000000010 [ 1010.201845] RDX: 0000000000000040 RSI: ffff88807c9f0958 RDI: 00000000014000c0 [ 1010.209095] RBP: ffffffff814646b8 R08: ffff8880921c7b08 R09: 0000000000000000 [ 1010.216357] R10: ffffffff81003d3b R11: ffff8880921c7b08 R12: 0000000000000000 [ 1010.223615] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 1010.230891] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 1010.235915] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1010.240668] ? pcpu_alloc+0x86f/0xf70 [ 1010.244468] ? pcpu_find_block_fit+0x380/0x380 [ 1010.249092] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1010.254628] ? rcu_read_lock_sched_held+0x10a/0x130 [ 1010.259622] ? init_timer_key+0x68/0x2f0 [ 1010.263662] ? init_srcu_struct_fields+0xdd9/0x12d0 [ 1010.268657] ? srcu_queue_delayed_work_on+0xf0/0xf0 [ 1010.273698] ? __raw_spin_lock_init+0x28/0x100 [ 1010.278265] ? kvm_dev_ioctl+0x8f4/0x1460 [ 1010.282408] ? kvm_put_kvm+0xa90/0xa90 [ 1010.286299] ? kvm_put_kvm+0xa90/0xa90 [ 1010.290196] ? do_vfs_ioctl+0x75a/0xfe0 [ 1010.294198] ? selinux_parse_skb.constprop.0+0x16c0/0x16c0 [ 1010.299801] ? ioctl_preallocate+0x1a0/0x1a0 [ 1010.304248] ? security_file_ioctl+0x76/0xb0 [ 1010.308642] ? security_file_ioctl+0x83/0xb0 [ 1010.313027] ? SyS_ioctl+0x7f/0xb0 [ 1010.316559] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1010.320514] ? do_syscall_64+0x1d5/0x640 [ 1010.324559] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1010.329917] [ 1010.331525] The buggy address belongs to the page: [ 1010.336448] page:ffffea00024871c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 1010.344569] flags: 0xfffe0000000000() [ 1010.348358] raw: 00fffe0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 1010.356233] raw: 0000000000000000 0000000100000001 0000000000000000 0000000000000000 [ 1010.364089] page dumped because: kasan: bad access detected [ 1010.369773] [ 1010.371376] Memory state around the buggy address: [ 1010.376281] ffff8880921c7980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 1010.383633] ffff8880921c7a00: f1 f1 f1 f1 00 00 00 f2 00 00 00 f2 f2 f2 00 00 [ 1010.390971] >ffff8880921c7a80: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 [ 1010.398304] ^ [ 1010.402689] ffff8880921c7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 [ 1010.410024] ffff8880921c7b80: f1 f1 f1 f1 04 f2 04 f3 f3 f3 00 00 00 00 00 00 [ 1010.417373] ================================================================== [ 1010.424722] Disabling lock debugging due to kernel taint [ 1010.430148] Kernel panic - not syncing: panic_on_warn set ... [ 1010.430148] [ 1010.437492] CPU: 1 PID: 29363 Comm: syz-executor945 Tainted: G B 4.14.184-syzkaller #0 [ 1010.446648] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1010.456074] Call Trace: [ 1010.458635] [ 1010.460768] dump_stack+0x1b2/0x283 [ 1010.464391] panic+0x1f9/0x42d [ 1010.467561] ? add_taint.cold+0x16/0x16 [ 1010.471599] ? lock_downgrade+0x6e0/0x6e0 [ 1010.475725] ? unwind_next_frame+0x131a/0x1700 [ 1010.480301] kasan_end_report+0x43/0x49 [ 1010.484253] kasan_report.cold+0x12f/0x2b9 [ 1010.488469] unwind_next_frame+0x131a/0x1700 [ 1010.493037] ? retint_kernel+0x2d/0x2d [ 1010.496900] ? deref_stack_reg+0xc0/0xc0 [ 1010.501024] ? check_preemption_disabled+0x35/0x240 [ 1010.506020] ? retint_kernel+0x2d/0x2d [ 1010.509883] perf_callchain_kernel+0x38c/0x520 [ 1010.514442] ? arch_perf_update_userpage+0x300/0x300 [ 1010.519519] ? retint_kernel+0x2d/0x2d [ 1010.523383] ? pcpu_alloc+0x86f/0xf70 [ 1010.527173] ? check_preemption_disabled+0x35/0x240 [ 1010.532165] get_perf_callchain+0x2df/0x740 [ 1010.536465] ? put_callchain_buffers+0x60/0x60 [ 1010.541028] ? __task_pid_nr_ns+0x1ea/0x440 [ 1010.545326] perf_callchain+0x147/0x190 [ 1010.549278] perf_prepare_sample+0x75b/0x1350 [ 1010.553749] ? lock_acquire+0x170/0x3f0 [ 1010.557711] ? perf_output_sample+0x1720/0x1720 [ 1010.562363] ? check_preemption_disabled+0x35/0x240 [ 1010.567355] perf_event_output_forward+0xc9/0x1f0 [ 1010.572175] ? perf_prepare_sample+0x1350/0x1350 [ 1010.576910] ? __lock_acquire+0x655/0x42a0 [ 1010.581121] ? lock_downgrade+0x6e0/0x6e0 [ 1010.585244] ? check_preemption_disabled+0x35/0x240 [ 1010.590238] ? check_preemption_disabled+0x35/0x240 [ 1010.595233] __perf_event_overflow+0x113/0x310 [ 1010.599794] perf_swevent_hrtimer+0x220/0x350 [ 1010.604291] ? __perf_event_overflow+0x310/0x310 [ 1010.609040] ? debug_object_deactivate+0x1cc/0x350 [ 1010.613948] ? lock_acquire+0x170/0x3f0 [ 1010.617898] ? lock_downgrade+0x6e0/0x6e0 [ 1010.622040] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1010.627141] ? debug_object_deactivate+0x1cc/0x350 [ 1010.632048] ? __hrtimer_run_queues+0x205/0xb90 [ 1010.636708] ? lock_downgrade+0x6e0/0x6e0 [ 1010.640832] __hrtimer_run_queues+0x24b/0xb90 [ 1010.645303] ? __perf_event_overflow+0x310/0x310 [ 1010.650033] ? enqueue_hrtimer+0x3a0/0x3a0 [ 1010.654260] hrtimer_interrupt+0x1e6/0x5e0 [ 1010.658480] smp_apic_timer_interrupt+0x117/0x5f0 [ 1010.663300] apic_timer_interrupt+0x93/0xa0 [ 1010.667596] [ 1010.669809] RIP: 0010:lock_acquire+0x97/0x3f0 [ 1010.674290] RSP: 0018:ffff8880921c7930 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 [ 1010.681990] RAX: 1ffffffff0f62cd0 RBX: ffff888088baa2c0 RCX: 0000000000000000 [ 1010.689235] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff888088baab44 [ 1010.696505] RBP: ffffffff87bfa460 R08: 0000000000000001 R09: 0000000000000000 [ 1010.703750] R10: ffff8880921c7b08 R11: 0000000000000000 R12: 0000000000000000 [ 1010.710993] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 1010.718253] pcpu_alloc+0x86f/0xf70 [ 1010.721873] ? __mutex_lock+0xe8/0x1430 [ 1010.725821] ? pcpu_alloc+0x86f/0xf70 [ 1010.729597] ? trace_hardirqs_on+0x10/0x10 [ 1010.733810] ? pcpu_alloc+0x86f/0xf70 [ 1010.737587] ? retint_kernel+0x2d/0x2d [ 1010.741452] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1010.746201] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1010.751627] ? retint_kernel+0x2d/0x2d [ 1010.755491] retint_kernel+0x2d/0x2d [ 1010.759182] RIP: 0000:pcpu_alloc+0x86f/0xf70 [ 1010.763563] RSP: 14000c0:ffff88807c9f0958 EFLAGS: 000001c0 ORIG_RAX: ffffffff8176ab0f [ 1010.771508] RAX: 00000000000001bf RBX: 0000000000000000 RCX: 0000000000000010 [ 1010.778768] RDX: 0000000000000040 RSI: ffff88807c9f0958 RDI: 00000000014000c0 [ 1010.786028] RBP: ffffffff814646b8 R08: ffff8880921c7b08 R09: 0000000000000000 [ 1010.793273] R10: ffffffff81003d3b R11: ffff8880921c7b08 R12: 0000000000000000 [ 1010.800521] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 1010.807779] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 1010.812787] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1010.817521] ? pcpu_alloc+0x86f/0xf70 [ 1010.821315] ? pcpu_find_block_fit+0x380/0x380 [ 1010.825874] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1010.831312] ? rcu_read_lock_sched_held+0x10a/0x130 [ 1010.836307] ? init_timer_key+0x68/0x2f0 [ 1010.840343] ? init_srcu_struct_fields+0xdd9/0x12d0 [ 1010.845336] ? srcu_queue_delayed_work_on+0xf0/0xf0 [ 1010.850328] ? __raw_spin_lock_init+0x28/0x100 [ 1010.854887] ? kvm_dev_ioctl+0x8f4/0x1460 [ 1010.859025] ? kvm_put_kvm+0xa90/0xa90 [ 1010.862888] ? kvm_put_kvm+0xa90/0xa90 [ 1010.866752] ? do_vfs_ioctl+0x75a/0xfe0 [ 1010.870704] ? selinux_parse_skb.constprop.0+0x16c0/0x16c0 [ 1010.876394] ? ioctl_preallocate+0x1a0/0x1a0 [ 1010.880779] ? security_file_ioctl+0x76/0xb0 [ 1010.885165] ? security_file_ioctl+0x83/0xb0 [ 1010.889563] ? SyS_ioctl+0x7f/0xb0 [ 1010.893077] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1010.897028] ? do_syscall_64+0x1d5/0x640 [ 1010.901066] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1010.907912] Kernel Offset: disabled [ 1010.911533] Rebooting in 86400 seconds..