[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.932569][ T26] audit: type=1800 audit(1561524615.249:25): pid=8474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 52.986453][ T26] audit: type=1800 audit(1561524615.259:26): pid=8474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 53.033280][ T26] audit: type=1800 audit(1561524615.259:27): pid=8474 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 '10.128.0.209' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 519.645126][ T1046] INFO: task syz-executor516:8629 can't die for more than 143 seconds. [ 519.653546][ T1046] syz-executor516 D27424 8629 8628 0x00004004 [ 519.665878][ T1046] Call Trace: [ 519.669254][ T1046] __schedule+0x755/0x1580 [ 519.673672][ T1046] ? __sched_text_start+0x8/0x8 [ 519.678876][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 519.684070][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 519.689685][ T1046] ? lockdep_hardirqs_on+0x418/0x5d0 [ 519.695262][ T1046] schedule+0xa8/0x270 [ 519.699333][ T1046] rwsem_down_read_slowpath+0x4cc/0xf90 [ 519.704868][ T1046] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 519.711068][ T1046] ? down_write_killable_nested+0x180/0x180 [ 519.717222][ T1046] ? mark_held_locks+0xf0/0xf0 [ 519.721983][ T1046] ? free_object+0x9/0x70 [ 519.726615][ T1046] ? lock_acquire+0x190/0x410 [ 519.731291][ T1046] ? __do_page_fault+0xa72/0xdc0 [ 519.736499][ T1046] down_read+0x1f4/0x3f0 [ 519.740738][ T1046] ? down_read+0xa3/0x3f0 [ 519.745397][ T1046] ? down_read+0x1f4/0x3f0 [ 519.749808][ T1046] ? down_read_trylock+0x9b/0x1a0 [ 519.754869][ T1046] ? down_read_killable+0x460/0x460 [ 519.760375][ T1046] ? __do_page_fault+0x804/0xdc0 [ 519.765567][ T1046] ? lockdep_hardirqs_on+0x418/0x5d0 [ 519.771022][ T1046] ? trace_hardirqs_on+0x67/0x240 [ 519.776320][ T1046] __do_page_fault+0xa72/0xdc0 [ 519.781084][ T1046] ? trace_hardirqs_off_caller+0x65/0x230 [ 519.787080][ T1046] do_page_fault+0x71/0x5e1 [ 519.791583][ T1046] ? page_fault+0x8/0x30 [ 519.796112][ T1046] page_fault+0x1e/0x30 [ 519.800265][ T1046] RIP: 0033:0x4ab79d [ 519.804160][ T1046] Code: Bad RIP value. [ 519.808500][ T1046] RSP: 002b:00007ffe31de0a50 EFLAGS: 00010206 [ 519.814560][ T1046] RAX: 00000000004ab8c0 RBX: 0000000000000001 RCX: 00000000006e0330 [ 519.822808][ T1046] RDX: 0000000000407620 RSI: 0000000000000000 RDI: 00000000004ccb90 [ 519.831050][ T1046] RBP: 00007ffe31de0a70 R08: 000000037ffffa00 R09: 000000037ffffa00 [ 519.839266][ T1046] R10: 00007ffe31de0ae0 R11: 0000000000000000 R12: 0000000000000001 [ 519.847483][ T1046] R13: 00000000006e0320 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 519.855737][ T1046] INFO: task syz-executor516:8629 blocked for more than 143 seconds. [ 519.863789][ T1046] Not tainted 5.2.0-rc6-next-20190625 #22 [ 519.870266][ T1046] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 519.880735][ T1046] syz-executor516 D27424 8629 8628 0x00004004 [ 519.887333][ T1046] Call Trace: [ 519.890628][ T1046] __schedule+0x755/0x1580 [ 519.895314][ T1046] ? __sched_text_start+0x8/0x8 [ 519.900161][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 519.905622][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 519.910825][ T1046] ? lockdep_hardirqs_on+0x418/0x5d0 [ 519.916388][ T1046] schedule+0xa8/0x270 [ 519.920460][ T1046] rwsem_down_read_slowpath+0x4cc/0xf90 [ 519.926278][ T1046] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 519.932084][ T1046] ? down_write_killable_nested+0x180/0x180 [ 519.938320][ T1046] ? mark_held_locks+0xf0/0xf0 [ 519.943086][ T1046] ? free_object+0x9/0x70 [ 519.947687][ T1046] ? lock_acquire+0x190/0x410 [ 519.952365][ T1046] ? __do_page_fault+0xa72/0xdc0 [ 519.957650][ T1046] down_read+0x1f4/0x3f0 [ 519.961893][ T1046] ? down_read+0xa3/0x3f0 [ 519.966490][ T1046] ? down_read+0x1f4/0x3f0 [ 519.970915][ T1046] ? down_read_trylock+0x9b/0x1a0 [ 519.976202][ T1046] ? down_read_killable+0x460/0x460 [ 519.981401][ T1046] ? __do_page_fault+0x804/0xdc0 [ 519.986606][ T1046] ? lockdep_hardirqs_on+0x418/0x5d0 [ 519.991892][ T1046] ? trace_hardirqs_on+0x67/0x240 [ 519.997184][ T1046] __do_page_fault+0xa72/0xdc0 [ 520.001949][ T1046] ? trace_hardirqs_off_caller+0x65/0x230 [ 520.008026][ T1046] do_page_fault+0x71/0x5e1 [ 520.012525][ T1046] ? page_fault+0x8/0x30 [ 520.017045][ T1046] page_fault+0x1e/0x30 [ 520.021194][ T1046] RIP: 0033:0x4ab79d [ 520.025356][ T1046] Code: Bad RIP value. [ 520.029415][ T1046] RSP: 002b:00007ffe31de0a50 EFLAGS: 00010206 [ 520.035747][ T1046] RAX: 00000000004ab8c0 RBX: 0000000000000001 RCX: 00000000006e0330 [ 520.043710][ T1046] RDX: 0000000000407620 RSI: 0000000000000000 RDI: 00000000004ccb90 [ 520.051956][ T1046] RBP: 00007ffe31de0a70 R08: 000000037ffffa00 R09: 000000037ffffa00 [ 520.060192][ T1046] R10: 00007ffe31de0ae0 R11: 0000000000000000 R12: 0000000000000001 [ 520.068411][ T1046] R13: 00000000006e0320 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 520.076650][ T1046] INFO: task syz-executor516:8630 blocked for more than 143 seconds. [ 520.084701][ T1046] Not tainted 5.2.0-rc6-next-20190625 #22 [ 520.091162][ T1046] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 520.100036][ T1046] syz-executor516 D28376 8630 8628 0x80004004 [ 520.106625][ T1046] Call Trace: [ 520.109937][ T1046] __schedule+0x755/0x1580 [ 520.114355][ T1046] ? __sched_text_start+0x8/0x8 [ 520.119479][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 520.124671][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 520.130134][ T1046] ? lockdep_hardirqs_on+0x418/0x5d0 [ 520.135670][ T1046] schedule+0xa8/0x270 [ 520.139738][ T1046] rwsem_down_read_slowpath+0x4cc/0xf90 [ 520.145568][ T1046] ? __lock_acquire+0x16f0/0x4680 [ 520.150596][ T1046] ? down_write_killable_nested+0x180/0x180 [ 520.156747][ T1046] ? mark_held_locks+0xf0/0xf0 [ 520.161516][ T1046] ? lock_acquire+0x190/0x410 [ 520.166451][ T1046] ? do_exit+0x450/0x2eb0 [ 520.170787][ T1046] down_read+0x1f4/0x3f0 [ 520.175374][ T1046] ? down_read+0xa3/0x3f0 [ 520.179697][ T1046] ? down_read+0x1f4/0x3f0 [ 520.184110][ T1046] ? down_read_killable+0x460/0x460 [ 520.189610][ T1046] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 520.196100][ T1046] ? sync_mm_rss+0xa4/0x1c0 [ 520.200605][ T1046] do_exit+0x450/0x2eb0 [ 520.204764][ T1046] ? find_held_lock+0x35/0x130 [ 520.209921][ T1046] ? mm_update_next_owner+0x640/0x640 [ 520.215550][ T1046] ? lock_downgrade+0x920/0x920 [ 520.220397][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 520.225858][ T1046] ? get_signal+0x392/0x2500 [ 520.230442][ T1046] ? _raw_spin_unlock_irq+0x28/0x90 [ 520.235912][ T1046] do_group_exit+0x135/0x360 [ 520.240507][ T1046] get_signal+0x47c/0x2500 [ 520.244921][ T1046] ? put_ctx+0xd2/0x120 [ 520.249362][ T1046] ? _perf_ioctl+0x1350/0x1350 [ 520.254135][ T1046] ? do_vfs_ioctl+0x120/0x13e0 [ 520.259183][ T1046] do_signal+0x87/0x1700 [ 520.263422][ T1046] ? __fget+0x384/0x560 [ 520.267852][ T1046] ? setup_sigcontext+0x7d0/0x7d0 [ 520.272886][ T1046] ? exit_to_usermode_loop+0x43/0x2d0 [ 520.278601][ T1046] ? do_syscall_64+0x5a9/0x6a0 [ 520.283364][ T1046] ? exit_to_usermode_loop+0x43/0x2d0 [ 520.289014][ T1046] ? lockdep_hardirqs_on+0x418/0x5d0 [ 520.294294][ T1046] ? trace_hardirqs_on+0x67/0x240 [ 520.299591][ T1046] exit_to_usermode_loop+0x251/0x2d0 [ 520.304882][ T1046] do_syscall_64+0x5a9/0x6a0 [ 520.309747][ T1046] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 520.315910][ T1046] RIP: 0033:0x4468f9 [ 520.319809][ T1046] Code: 67 66 69 6c 65 3d 64 65 62 75 67 2e 63 22 0a 00 00 45 52 52 4f 52 3a 20 6f 75 74 20 6f 66 20 6d 65 6d 6f 72 79 20 64 75 72 69 <6e> 67 20 64 65 62 75 67 20 73 65 74 75 70 0a 00 00 00 00 00 00 00 [ 520.339711][ T1046] RSP: 002b:00007f0e25164db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 520.348378][ T1046] RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 00000000004468f9 [ 520.356599][ T1046] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28 [ 520.364564][ T1046] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 520.372805][ T1046] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 520.381028][ T1046] R13: 00007ffe31de0a4f R14: 00007f0e251659c0 R15: 20c49ba5e353f7cf [ 520.389278][ T1046] INFO: task syz-executor516:8631 can't die for more than 144 seconds. [ 520.397743][ T1046] syz-executor516 R running task 29000 8631 8628 0x00004006 [ 520.405905][ T1046] Call Trace: [ 520.409194][ T1046] kasan_check_read+0x11/0x20 [ 520.413866][ T1046] mark_lock+0xc0/0x11e0 [ 520.418385][ T1046] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 520.423841][ T1046] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 520.429638][ T1046] ? kasan_check_read+0x11/0x20 [ 520.434484][ T1046] ? mark_lock+0xc0/0x11e0 [ 520.439159][ T1046] mark_held_locks+0xa4/0xf0 [ 520.443749][ T1046] kasan_check_read+0x11/0x20 [ 520.448814][ T1046] __lock_acquire+0x16f0/0x4680 [ 520.453663][ T1046] ? preempt_schedule_irq+0xf3/0x160 [ 520.459209][ T1046] ? kasan_check_read+0x11/0x20 [ 520.464058][ T1046] ? mark_lock+0xc0/0x11e0 [ 520.468749][ T1046] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 520.474231][ T1046] ? perf_mmap+0x745/0x1940 [ 520.478994][ T1046] ? find_held_lock+0x35/0x130 [ 520.483749][ T1046] ? perf_mmap+0x745/0x1940 [ 520.488525][ T1046] ? perf_mmap+0x745/0x1940 [ 520.493022][ T1046] ? __mutex_lock+0xf7/0x1340 [ 520.497968][ T1046] ? perf_mmap+0x745/0x1940 [ 520.502467][ T1046] ? perf_mmap+0x745/0x1940 [ 520.507231][ T1046] ? lockdep_hardirqs_on+0x418/0x5d0 [ 520.512511][ T1046] ? retint_kernel+0x2b/0x2b [ 520.517370][ T1046] ? mutex_lock_io_nested+0x11d0/0x11d0 [ 520.522918][ T1046] ? kasan_check_write+0x14/0x20 [ 520.528299][ T1046] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 520.533845][ T1046] ? __this_cpu_preempt_check+0x3a/0x210 [ 520.539751][ T1046] ? retint_kernel+0x2b/0x2b [ 520.544343][ T1046] ? wait_for_completion+0x440/0x440 [ 520.549904][ T1046] ? mutex_lock_nested+0x16/0x20 [ 520.554838][ T1046] ? mutex_lock_nested+0x16/0x20 [ 520.560032][ T1046] ? perf_mmap+0x745/0x1940 [ 520.564543][ T1046] ? perf_release+0x50/0x50 [ 520.569388][ T1046] ? memset+0x32/0x40 [ 520.573371][ T1046] ? mmap_region+0xc35/0x1760 [ 520.578326][ T1046] ? __x64_sys_brk+0x760/0x760 [ 520.583089][ T1046] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 520.589598][ T1046] ? get_unmapped_area+0x2ad/0x3d0 [ 520.594721][ T1046] ? do_mmap+0x82e/0x1090 [ 520.599313][ T1046] ? vm_mmap_pgoff+0x1c5/0x230 [ 520.604086][ T1046] ? vma_is_stack_for_current+0xd0/0xd0 [ 520.609909][ T1046] ? ksys_dup3+0x3e0/0x3e0 [ 520.614328][ T1046] ? find_held_lock+0x35/0x130 [ 520.620566][ T1046] ? calculate_sigpending+0x86/0xa0 [ 520.626018][ T1046] ? ksys_mmap_pgoff+0x4aa/0x630 [ 520.630970][ T1046] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 520.636866][ T1046] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 520.642318][ T1046] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 520.648054][ T1046] ? do_syscall_64+0x26/0x6a0 [ 520.652732][ T1046] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 520.659115][ T1046] ? __x64_sys_mmap+0xe9/0x1b0 [ 520.663881][ T1046] ? do_syscall_64+0xfd/0x6a0 [ 520.668904][ T1046] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 520.675275][ T1046] [ 520.675275][ T1046] Showing all locks held in the system: [ 520.682989][ T1046] 1 lock held by khungtaskd/1046: [ 520.688374][ T1046] #0: 00000000d572e300 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 520.697967][ T1046] 1 lock held by rsyslogd/8512: [ 520.702804][ T1046] #0: 00000000e0bb0754 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 520.711692][ T1046] 2 locks held by getty/8602: [ 520.716599][ T1046] #0: 00000000ea2a6b3f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 520.725809][ T1046] #1: 00000000269dd2c1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 [ 520.735620][ T1046] 2 locks held by getty/8603: [ 520.740286][ T1046] #0: 000000005e16bf79 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 520.749502][ T1046] #1: 00000000f7be4c04 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 [ 520.759305][ T1046] 2 locks held by getty/8604: [ 520.763966][ T1046] #0: 0000000004d0e038 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 520.773166][ T1046] #1: 000000001d9d2f8e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 [ 520.783053][ T1046] 2 locks held by getty/8605: [ 520.788023][ T1046] #0: 00000000bc57eb01 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 520.797211][ T1046] #1: 00000000878db334 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 [ 520.807017][ T1046] 2 locks held by getty/8606: [ 520.811681][ T1046] #0: 00000000106b2de3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 520.820897][ T1046] #1: 00000000841b9df3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 [ 520.830699][ T1046] 2 locks held by getty/8607: [ 520.835616][ T1046] #0: 0000000009193d23 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 520.844557][ T1046] #1: 00000000c50d9e7c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 [ 520.854404][ T1046] 2 locks held by getty/8608: [ 520.859313][ T1046] #0: 0000000006d14dcb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 520.868507][ T1046] #1: 00000000b6928f4d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 [ 520.878320][ T1046] 1 lock held by syz-executor516/8629: [ 520.883773][ T1046] #0: 000000002065de5a (&mm->mmap_sem#2){++++}, at: __do_page_fault+0xa72/0xdc0 [ 520.893182][ T1046] 1 lock held by syz-executor516/8630: [ 520.898875][ T1046] #0: 000000002065de5a (&mm->mmap_sem#2){++++}, at: do_exit+0x450/0x2eb0 [ 520.907638][ T1046] 1 lock held by syz-executor516/8631: [ 520.913087][ T1046] [ 520.915681][ T1046] ============================================= [ 520.915681][ T1046] [ 520.924084][ T1046] NMI backtrace for cpu 0 [ 520.928449][ T1046] CPU: 0 PID: 1046 Comm: khungtaskd Not tainted 5.2.0-rc6-next-20190625 #22 [ 520.937103][ T1046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 520.947148][ T1046] Call Trace: [ 520.950523][ T1046] dump_stack+0x172/0x1f0 [ 520.954854][ T1046] nmi_cpu_backtrace.cold+0x70/0xb2 [ 520.960049][ T1046] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 520.966282][ T1046] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 520.971907][ T1046] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 520.977882][ T1046] arch_trigger_cpumask_backtrace+0x14/0x20 [ 520.983772][ T1046] watchdog+0xc54/0x1320 [ 520.988020][ T1046] kthread+0x361/0x430 [ 520.992086][ T1046] ? reset_hung_task_detector+0x30/0x30 [ 520.997624][ T1046] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 521.003943][ T1046] ret_from_fork+0x24/0x30 [ 521.008412][ T1046] Sending NMI from CPU 0 to CPUs 1: [ 521.014120][ C1] NMI backtrace for cpu 1 [ 521.014126][ C1] CPU: 1 PID: 8631 Comm: syz-executor516 Not tainted 5.2.0-rc6-next-20190625 #22 [ 521.014132][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 521.014136][ C1] RIP: 0010:check_memory_region+0x2d/0x190 [ 521.014146][ C1] Code: 0f 84 21 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 53 0f 86 f6 00 00 00 4c 8d 5c 37 ff <49> 89 f8 48 b8 00 00 00 00 00 fc ff df 4d 89 da 49 c1 e8 03 4d 8d [ 521.014149][ C1] RSP: 0018:ffff88808e02f8d0 EFLAGS: 00000212 [ 521.014157][ C1] RAX: ffff7fffffffffff RBX: dffffc0000000000 RCX: ffffffff872e94e4 [ 521.014161][ C1] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880a8b27130 [ 521.014166][ C1] RBP: ffff88808e02f8e8 R08: 0000000000004e4a R09: fffffbfff14a0556 [ 521.014170][ C1] R10: ffff8880a90b8978 R11: ffff8880a8b27137 R12: 0000000000000000 [ 521.014175][ C1] R13: ffff8880a8b27130 R14: 0000000000000000 R15: ffffffff818a56d5 [ 521.014180][ C1] FS: 00007f0e25144700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 521.014184][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 521.014189][ C1] CR2: ffffffffff600400 CR3: 00000000a0f95000 CR4: 00000000001506e0 [ 521.014194][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 521.014199][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 521.014201][ C1] Call Trace: [ 521.014204][ C1] kasan_check_read+0x11/0x20 [ 521.014207][ C1] __mutex_lock+0x104/0x1340 [ 521.014211][ C1] ? perf_mmap+0x745/0x1940 [ 521.014214][ C1] ? perf_mmap+0x745/0x1940 [ 521.014217][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 521.014220][ C1] ? retint_kernel+0x2b/0x2b [ 521.014224][ C1] ? mutex_lock_io_nested+0x11d0/0x11d0 [ 521.014227][ C1] ? kasan_check_write+0x14/0x20 [ 521.014231][ C1] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 521.014235][ C1] ? __this_cpu_preempt_check+0x3a/0x210 [ 521.014238][ C1] ? retint_kernel+0x2b/0x2b [ 521.014247][ C1] ? wait_for_completion+0x440/0x440 [ 521.014250][ C1] mutex_lock_nested+0x16/0x20 [ 521.014254][ C1] ? mutex_lock_nested+0x16/0x20 [ 521.014257][ C1] perf_mmap+0x745/0x1940 [ 521.014260][ C1] ? perf_release+0x50/0x50 [ 521.014263][ C1] ? memset+0x32/0x40 [ 521.014266][ C1] mmap_region+0xc35/0x1760 [ 521.014269][ C1] ? __x64_sys_brk+0x760/0x760 [ 521.014273][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 521.014276][ C1] ? get_unmapped_area+0x2ad/0x3d0 [ 521.014280][ C1] do_mmap+0x82e/0x1090 [ 521.014283][ C1] vm_mmap_pgoff+0x1c5/0x230 [ 521.014286][ C1] ? vma_is_stack_for_current+0xd0/0xd0 [ 521.014290][ C1] ? ksys_dup3+0x3e0/0x3e0 [ 521.014293][ C1] ? find_held_lock+0x35/0x130 [ 521.014296][ C1] ? calculate_sigpending+0x86/0xa0 [ 521.014300][ C1] ksys_mmap_pgoff+0x4aa/0x630 [ 521.014303][ C1] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 521.014307][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 521.014310][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 521.014314][ C1] ? do_syscall_64+0x26/0x6a0 [ 521.014318][ C1] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 521.014321][ C1] __x64_sys_mmap+0xe9/0x1b0 [ 521.014324][ C1] do_syscall_64+0xfd/0x6a0 [ 521.014328][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 521.014331][ C1] RIP: 0033:0x4468f9 [ 521.014341][ C1] Code: e8 5c 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 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 521.014344][ C1] RSP: 002b:00007f0e25143da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 521.014353][ C1] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004468f9 [ 521.014357][ C1] RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000020fff000 [ 521.014362][ C1] RBP: 00000000006dbc30 R08: 0000000000000003 R09: 0000000000000000 [ 521.014366][ C1] R10: 0000000000001011 R11: 0000000000000246 R12: 00000000006dbc3c [ 521.014371][ C1] R13: 00007ffe31de0a4f R14: 00007f0e251449c0 R15: 20c49ba5e353f7cf [ 521.022826][ T1046] Kernel panic - not syncing: hung_task: blocked tasks [ 521.409574][ T1046] CPU: 0 PID: 1046 Comm: khungtaskd Not tainted 5.2.0-rc6-next-20190625 #22 [ 521.418229][ T1046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 521.428272][ T1046] Call Trace: [ 521.431559][ T1046] dump_stack+0x172/0x1f0 [ 521.435892][ T1046] panic+0x2dc/0x755 [ 521.439781][ T1046] ? add_taint.cold+0x16/0x16 [ 521.444452][ T1046] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 521.450080][ T1046] ? ___preempt_schedule+0x16/0x18 [ 521.455189][ T1046] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 521.461336][ T1046] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 521.467482][ T1046] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 521.473625][ T1046] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 521.479773][ T1046] watchdog+0xc65/0x1320 [ 521.484015][ T1046] kthread+0x361/0x430 [ 521.488078][ T1046] ? reset_hung_task_detector+0x30/0x30 [ 521.493614][ T1046] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 521.499846][ T1046] ret_from_fork+0x24/0x30 [ 521.505781][ T1046] Kernel Offset: disabled [ 521.510112][ T1046] Rebooting in 86400 seconds..