[ 1050.683088] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.79' (ECDSA) to the list of known hosts. [ 1056.312370] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 1056.446842] audit: type=1400 audit(1581714380.234:36): avc: denied { map } for pid=7377 comm="syz-executor235" path="/root/syz-executor235386759" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1288.160272] INFO: task syz-executor235:7693 blocked for more than 140 seconds. [ 1288.168068] Not tainted 4.14.170-syzkaller #0 [ 1288.173666] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.181850] syz-executor235 D28528 7693 7381 0x00000004 [ 1288.187544] Call Trace: [ 1288.194260] __schedule+0x7b8/0x1cd0 [ 1288.198005] ? __mutex_lock+0x737/0x1470 [ 1288.203252] ? firmware_map_remove+0x196/0x196 [ 1288.207876] schedule+0x92/0x1c0 [ 1288.211794] schedule_preempt_disabled+0x13/0x20 [ 1288.216659] __mutex_lock+0x73c/0x1470 [ 1288.221000] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1288.226885] ? mutex_trylock+0x1c0/0x1c0 [ 1288.231444] ? lock_acquire+0x16f/0x430 [ 1288.235485] ? find_next_bit+0x28/0x30 [ 1288.239382] mutex_lock_nested+0x16/0x20 [ 1288.243854] ? mutex_lock_nested+0x16/0x20 [ 1288.248113] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1288.254101] hashlimit_mt_check_v2+0x304/0x390 [ 1288.258708] ? hashlimit_mt_check+0xc0/0xc0 [ 1288.263478] ? xt_find_match+0x3e/0x1e0 [ 1288.267468] ? hashlimit_mt_check+0xc0/0xc0 [ 1288.272428] xt_check_match+0x254/0x530 [ 1288.277321] ? xt_check_target+0x510/0x510 [ 1288.281909] ? wait_for_completion+0x420/0x420 [ 1288.286590] ? mutex_unlock+0xd/0x10 [ 1288.291292] ? xt_find_match+0x178/0x1e0 [ 1288.295462] ? xt_request_find_match+0x4b/0xe0 [ 1288.300486] find_check_entry.isra.0+0x2f9/0x920 [ 1288.305633] ? ipt_do_table+0x1770/0x1770 [ 1288.309949] ? kfree+0x183/0x270 [ 1288.314023] ? kvfree+0x4d/0x60 [ 1288.317780] ? trace_hardirqs_on_caller+0x400/0x590 [ 1288.323385] ? trace_hardirqs_on+0xd/0x10 [ 1288.327569] translate_table+0xb3f/0x15a0 [ 1288.332952] ? __do_replace+0x5b0/0x5b0 [ 1288.338047] ? _copy_from_user+0x99/0x110 [ 1288.343680] do_ipt_set_ctl+0x268/0x3ee [ 1288.347991] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1288.353257] ? mutex_unlock+0xd/0x10 [ 1288.357647] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1288.364615] nf_setsockopt+0x67/0xc0 [ 1288.368412] ip_setsockopt+0x9b/0xb0 [ 1288.373660] udp_setsockopt+0x4e/0x90 [ 1288.377829] ipv6_setsockopt+0x9e/0x130 [ 1288.382577] tcp_setsockopt+0x84/0xd0 [ 1288.386603] sock_common_setsockopt+0x94/0xd0 [ 1288.391575] SyS_setsockopt+0x13c/0x210 [ 1288.396006] ? SyS_recv+0x40/0x40 [ 1288.400822] ? do_syscall_64+0x53/0x640 [ 1288.405804] ? SyS_recv+0x40/0x40 [ 1288.409665] do_syscall_64+0x1e8/0x640 [ 1288.414612] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1288.419691] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1288.425650] RIP: 0033:0x4412c9 [ 1288.429218] RSP: 002b:00007ffc6fa745d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1288.438438] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 1288.447794] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1288.457066] RBP: 0000000000102ce1 R08: 0000000000000001 R09: 00000000004002c8 [ 1288.466846] R10: 00000000200014c0 R11: 0000000000000246 R12: 0000000000402040 [ 1288.475988] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 1288.485237] INFO: task syz-executor235:7694 blocked for more than 140 seconds. [ 1288.494030] Not tainted 4.14.170-syzkaller #0 [ 1288.499410] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.508213] syz-executor235 D28080 7694 7380 0x00000004 [ 1288.514552] Call Trace: [ 1288.517589] __schedule+0x7b8/0x1cd0 [ 1288.522957] ? __mutex_lock+0x737/0x1470 [ 1288.527612] ? firmware_map_remove+0x196/0x196 [ 1288.533131] schedule+0x92/0x1c0 [ 1288.536862] schedule_preempt_disabled+0x13/0x20 [ 1288.542184] __mutex_lock+0x73c/0x1470 [ 1288.547383] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1288.554428] ? mutex_trylock+0x1c0/0x1c0 [ 1288.559212] ? lock_acquire+0x16f/0x430 [ 1288.564113] ? find_next_bit+0x28/0x30 [ 1288.568788] mutex_lock_nested+0x16/0x20 [ 1288.573582] ? mutex_lock_nested+0x16/0x20 [ 1288.578099] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1288.585292] hashlimit_mt_check_v2+0x304/0x390 [ 1288.591165] ? hashlimit_mt_check+0xc0/0xc0 [ 1288.595599] ? xt_find_match+0x3e/0x1e0 [ 1288.599673] ? hashlimit_mt_check+0xc0/0xc0 [ 1288.605084] xt_check_match+0x254/0x530 [ 1288.609428] ? xt_check_target+0x510/0x510 [ 1288.614759] ? wait_for_completion+0x420/0x420 [ 1288.622038] ? mutex_unlock+0xd/0x10 [ 1288.626935] ? xt_find_match+0x178/0x1e0 [ 1288.632661] ? xt_request_find_match+0x4b/0xe0 [ 1288.638829] find_check_entry.isra.0+0x2f9/0x920 [ 1288.644584] ? ipt_do_table+0x1770/0x1770 [ 1288.649022] ? kfree+0x183/0x270 [ 1288.652773] ? kvfree+0x4d/0x60 [ 1288.656084] ? trace_hardirqs_on_caller+0x400/0x590 [ 1288.661489] ? trace_hardirqs_on+0xd/0x10 [ 1288.665795] translate_table+0xb3f/0x15a0 [ 1288.670815] ? __do_replace+0x5b0/0x5b0 [ 1288.674808] ? _copy_from_user+0x99/0x110 [ 1288.679500] do_ipt_set_ctl+0x268/0x3ee [ 1288.683890] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1288.689093] ? mutex_unlock+0xd/0x10 [ 1288.693472] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1288.699205] nf_setsockopt+0x67/0xc0 [ 1288.703887] ip_setsockopt+0x9b/0xb0 [ 1288.708207] udp_setsockopt+0x4e/0x90 [ 1288.712697] ipv6_setsockopt+0x9e/0x130 [ 1288.717115] tcp_setsockopt+0x84/0xd0 [ 1288.722473] sock_common_setsockopt+0x94/0xd0 [ 1288.727837] SyS_setsockopt+0x13c/0x210 [ 1288.732531] ? SyS_recv+0x40/0x40 [ 1288.736583] ? do_syscall_64+0x53/0x640 [ 1288.741085] ? SyS_recv+0x40/0x40 [ 1288.744585] do_syscall_64+0x1e8/0x640 [ 1288.748481] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1288.753715] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1288.759176] RIP: 0033:0x4412c9 [ 1288.762659] RSP: 002b:00007ffc6fa745d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1288.770690] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 1288.778140] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1288.785903] RBP: 0000000000102ce4 R08: 0000000000000001 R09: 00000000004002c8 [ 1288.793274] R10: 00000000200014c0 R11: 0000000000000246 R12: 0000000000402040 [ 1288.801146] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 1288.809812] INFO: task syz-executor235:7695 blocked for more than 140 seconds. [ 1288.818789] Not tainted 4.14.170-syzkaller #0 [ 1288.824214] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.833069] syz-executor235 D28280 7695 7382 0x00000004 [ 1288.839194] Call Trace: [ 1288.842262] __schedule+0x7b8/0x1cd0 [ 1288.846079] ? __mutex_lock+0x737/0x1470 [ 1288.851620] ? firmware_map_remove+0x196/0x196 [ 1288.856233] schedule+0x92/0x1c0 [ 1288.859892] schedule_preempt_disabled+0x13/0x20 [ 1288.865192] __mutex_lock+0x73c/0x1470 [ 1288.869320] ? hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1288.876411] ? mutex_trylock+0x1c0/0x1c0 [ 1288.881439] ? _raw_spin_unlock_irq+0x5e/0x90 [ 1288.885999] ? finish_task_switch+0x178/0x650 [ 1288.890937] mutex_lock_nested+0x16/0x20 [ 1288.895014] ? mutex_lock_nested+0x16/0x20 [ 1288.899270] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1288.905390] hashlimit_mt_check_v2+0x304/0x390 [ 1288.910014] ? hashlimit_mt_check+0xc0/0xc0 [ 1288.914710] ? xt_find_match+0x3e/0x1e0 [ 1288.918728] ? hashlimit_mt_check+0xc0/0xc0 [ 1288.923467] xt_check_match+0x254/0x530 [ 1288.927449] ? xt_check_target+0x510/0x510 [ 1288.932216] ? wait_for_completion+0x420/0x420 [ 1288.936831] ? mutex_unlock+0xd/0x10 [ 1288.940870] ? xt_find_match+0x178/0x1e0 [ 1288.944941] ? xt_request_find_match+0x4b/0xe0 [ 1288.949536] find_check_entry.isra.0+0x2f9/0x920 [ 1288.954712] ? ipt_do_table+0x1770/0x1770 [ 1288.958888] ? kfree+0x183/0x270 [ 1288.962588] ? kvfree+0x4d/0x60 [ 1288.966007] ? trace_hardirqs_on_caller+0x400/0x590 [ 1288.971461] ? trace_hardirqs_on+0xd/0x10 [ 1288.975654] translate_table+0xb3f/0x15a0 [ 1288.979916] ? __do_replace+0x5b0/0x5b0 [ 1288.984895] ? _copy_from_user+0x99/0x110 [ 1288.989053] do_ipt_set_ctl+0x268/0x3ee [ 1288.993400] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1288.998409] ? mutex_unlock+0xd/0x10 [ 1289.002452] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1289.007733] nf_setsockopt+0x67/0xc0 [ 1289.011784] ip_setsockopt+0x9b/0xb0 [ 1289.015515] udp_setsockopt+0x4e/0x90 [ 1289.019320] ipv6_setsockopt+0x9e/0x130 [ 1289.023687] tcp_setsockopt+0x84/0xd0 [ 1289.028235] sock_common_setsockopt+0x94/0xd0 [ 1289.033244] SyS_setsockopt+0x13c/0x210 [ 1289.037250] ? SyS_recv+0x40/0x40 [ 1289.041125] ? do_syscall_64+0x53/0x640 [ 1289.045103] ? SyS_recv+0x40/0x40 [ 1289.048568] do_syscall_64+0x1e8/0x640 [ 1289.052823] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1289.058042] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1289.063626] RIP: 0033:0x4412c9 [ 1289.066828] RSP: 002b:00007ffc6fa745d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1289.075058] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 1289.083637] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1289.092676] RBP: 0000000000102cd9 R08: 0000000000000001 R09: 00000000004002c8 [ 1289.100380] R10: 00000000200014c0 R11: 0000000000000246 R12: 0000000000402040 [ 1289.107653] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 1289.116619] [ 1289.116619] Showing all locks held in the system: [ 1289.124073] 1 lock held by khungtaskd/1055: [ 1289.128752] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f [ 1289.139988] 2 locks held by getty/7354: [ 1289.144274] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1289.154066] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1289.164561] 2 locks held by getty/7355: [ 1289.168801] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1289.178419] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1289.188306] 2 locks held by getty/7356: [ 1289.192531] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1289.201628] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1289.211656] 2 locks held by getty/7357: [ 1289.216151] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1289.226076] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1289.236757] 2 locks held by getty/7358: [ 1289.240810] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1289.250703] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1289.260885] 2 locks held by getty/7359: [ 1289.264944] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1289.274275] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1289.284224] 2 locks held by getty/7360: [ 1289.288379] #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 [ 1289.298906] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17d0 [ 1289.309148] 1 lock held by syz-executor235/7691: [ 1289.314363] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1289.326288] 1 lock held by syz-executor235/7693: [ 1289.331219] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1289.343794] 1 lock held by syz-executor235/7694: [ 1289.348727] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1289.359355] 1 lock held by syz-executor235/7695: [ 1289.364267] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1289.375730] 1 lock held by syz-executor235/7696: [ 1289.380789] #0: (hashlimit_mutex){+.+.}, at: [] hashlimit_mt_check_common.isra.0+0x2b8/0x11b0 [ 1289.391579] [ 1289.393381] ============================================= [ 1289.393381] [ 1289.403148] NMI backtrace for cpu 1 [ 1289.407338] CPU: 1 PID: 1055 Comm: khungtaskd Not tainted 4.14.170-syzkaller #0 [ 1289.416047] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1289.426849] Call Trace: [ 1289.430410] dump_stack+0x142/0x197 [ 1289.434235] nmi_cpu_backtrace.cold+0x57/0x94 [ 1289.438823] ? irq_force_complete_move.cold+0x7d/0x7d [ 1289.444037] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 1289.449611] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1289.455767] watchdog+0x5e7/0xb90 [ 1289.460124] kthread+0x319/0x430 [ 1289.463931] ? hungtask_pm_notify+0x50/0x50 [ 1289.468266] ? kthread_create_on_node+0xd0/0xd0 [ 1289.473474] ret_from_fork+0x24/0x30 [ 1289.477343] Sending NMI from CPU 1 to CPUs 0: [ 1289.482591] NMI backtrace for cpu 0 [ 1289.482595] CPU: 0 PID: 7692 Comm: syz-executor235 Not tainted 4.14.170-syzkaller #0 [ 1289.482598] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1289.482601] task: ffff8880a9846600 task.stack: ffff88801d0e0000 [ 1289.482603] RIP: 0010:__lock_acquire+0x49b/0x4620 [ 1289.482647] RSP: 0018:ffff88801d0e75c0 EFLAGS: 00000046 [ 1289.482660] RAX: 000000000000053f RBX: 0000000000040000 RCX: 0000000000000000 [ 1289.482663] RDX: 1ffff11015308dd9 RSI: 1ffff11015308dd4 RDI: ffff8880a9846ecc [ 1289.482666] RBP: ffff88801d0e7770 R08: 0000000000000001 R09: 0000000000040000 [ 1289.482669] R10: ffff8880a9846ea8 R11: ffff8880a9846600 R12: ffffc90005e20060 [ 1289.482672] R13: 000000000000053f R14: 0000000000000001 R15: 0000000000000000 [ 1289.482675] FS: 00000000012f3880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 1289.482678] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1289.482681] CR2: 00000000200014c0 CR3: 000000007a487000 CR4: 00000000001406f0 [ 1289.482684] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1289.482687] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1289.482688] Call Trace: [ 1289.482691] ? finish_task_switch+0x178/0x650 [ 1289.482693] ? finish_task_switch+0x14d/0x650 [ 1289.482695] ? switch_mm_irqs_off+0x5e1/0xec0 [ 1289.482697] ? trace_hardirqs_on+0x10/0x10 [ 1289.482699] ? trace_hardirqs_on_caller+0x19b/0x590 [ 1289.482702] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1289.482704] ? save_trace+0x290/0x290 [ 1289.482706] ? save_trace+0x290/0x290 [ 1289.482707] ? find_held_lock+0x35/0x130 [ 1289.482709] lock_acquire+0x16f/0x430 [ 1289.482712] ? htable_selective_cleanup+0x9c/0x300 [ 1289.482714] ? esp_mt+0x3c0/0x3c0 [ 1289.482716] _raw_spin_lock_bh+0x33/0x50 [ 1289.482718] ? htable_selective_cleanup+0x9c/0x300 [ 1289.482720] htable_selective_cleanup+0x9c/0x300 [ 1289.482722] htable_put+0x164/0x210 [ 1289.482724] ? hashlimit_mt_destroy+0x70/0x70 [ 1289.482726] hashlimit_mt_destroy_v2+0x56/0x70 [ 1289.482728] cleanup_match+0xc2/0x140 [ 1289.482730] ? icmp_checkentry+0x90/0x90 [ 1289.482732] ? xt_request_find_target+0x4b/0xe0 [ 1289.482735] find_check_entry.isra.0+0x3fe/0x920 [ 1289.482737] ? ipt_do_table+0x1770/0x1770 [ 1289.482739] ? kfree+0x183/0x270 [ 1289.482740] ? kvfree+0x4d/0x60 [ 1289.482743] translate_table+0xb3f/0x15a0 [ 1289.482745] ? __do_replace+0x5b0/0x5b0 [ 1289.482747] ? _copy_from_user+0x99/0x110 [ 1289.482749] do_ipt_set_ctl+0x268/0x3ee [ 1289.482751] ? compat_do_ipt_set_ctl+0x150/0x150 [ 1289.482753] ? mutex_unlock+0xd/0x10 [ 1289.482755] ? nf_sockopt_find.constprop.0+0x1b7/0x230 [ 1289.482757] nf_setsockopt+0x67/0xc0 [ 1289.482759] ip_setsockopt+0x9b/0xb0 [ 1289.482761] udp_setsockopt+0x4e/0x90 [ 1289.482763] ipv6_setsockopt+0x9e/0x130 [ 1289.482765] tcp_setsockopt+0x84/0xd0 [ 1289.482767] sock_common_setsockopt+0x94/0xd0 [ 1289.482769] SyS_setsockopt+0x13c/0x210 [ 1289.482771] ? SyS_recv+0x40/0x40 [ 1289.482773] ? do_syscall_64+0x53/0x640 [ 1289.482775] ? SyS_recv+0x40/0x40 [ 1289.482777] do_syscall_64+0x1e8/0x640 [ 1289.482779] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 1289.482782] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1289.482784] RIP: 0033:0x4412c9 [ 1289.482786] RSP: 002b:00007ffc6fa745d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 1289.482791] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004412c9 [ 1289.482794] RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 [ 1289.482797] RBP: 0000000000102cdd R08: 0000000000000001 R09: 00000000004002c8 [ 1289.482800] R10: 00000000200014c0 R11: 0000000000000246 R12: 0000000000402040 [ 1289.482803] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 1289.482805] Code: c1 e1 13 09 c3 41 8b 42 20 48 c1 ea 03 09 d9 44 89 c3 c1 e3 12 81 e3 00 00 04 00 09 d9 25 ff 1f 00 00 41 09 c9 8b 4d 20 c1 e1 14 <41> 09 c9 41 09 c1 48 b8 00 00 00 00 00 fc ff df 45 89 4a 20 0f [ 1289.483535] Kernel panic - not syncing: hung_task: blocked tasks [ 1289.871311] CPU: 1 PID: 1055 Comm: khungtaskd Not tainted 4.14.170-syzkaller #0 [ 1289.879461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1289.891466] Call Trace: [ 1289.894344] dump_stack+0x142/0x197 [ 1289.898379] panic+0x1f9/0x42d [ 1289.902091] ? add_taint.cold+0x16/0x16 [ 1289.906794] ? ___preempt_schedule+0x16/0x18 [ 1289.911237] watchdog+0x5f8/0xb90 [ 1289.915051] kthread+0x319/0x430 [ 1289.918593] ? hungtask_pm_notify+0x50/0x50 [ 1289.926679] ? kthread_create_on_node+0xd0/0xd0 [ 1289.931555] ret_from_fork+0x24/0x30 [ 1289.943848] Kernel Offset: disabled [ 1289.947960] Rebooting in 86400 seconds..