Warning: Permanently added '10.128.0.4' (ECDSA) to the list of known hosts. executing program [ 1001.341970] INFO: task syz-executor356:7984 blocked for more than 140 seconds. [ 1001.349388] Not tainted 4.14.277-syzkaller #0 [ 1001.355763] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.364102] syz-executor356 D28648 7984 7982 0x00000004 [ 1001.369717] Call Trace: [ 1001.372977] __schedule+0x88b/0x1de0 [ 1001.376684] ? lock_acquire+0x170/0x3f0 [ 1001.380635] ? io_schedule_timeout+0x140/0x140 [ 1001.385937] ? _raw_spin_unlock+0x29/0x40 [ 1001.390116] ? fuse_writepage_locked+0xe80/0xe80 [ 1001.395594] schedule+0x8d/0x1b0 [ 1001.398958] fuse_wait_on_page_writeback.isra.0+0xdc/0x120 [ 1001.405147] ? fuse_do_ioctl+0x1570/0x1570 [ 1001.409421] ? end_page_writeback+0xe3/0x1c0 [ 1001.414422] ? wait_woken+0x230/0x230 [ 1001.418213] fuse_launder_page+0xa2/0xd0 [ 1001.422837] invalidate_inode_pages2_range+0x547/0xc00 [ 1001.428195] ? clear_shadow_entry+0x160/0x160 [ 1001.433205] ? fuse_range_is_writeback+0x1f0/0x1f0 [ 1001.438120] ? fuse_file_alloc+0x1ca/0x260 [ 1001.442864] ? _raw_spin_unlock+0x29/0x40 [ 1001.446995] ? fuse_do_open+0x18e/0x460 [ 1001.450944] fuse_finish_open+0x262/0x500 [ 1001.455803] fuse_open_common+0x234/0x290 [ 1001.459982] do_dentry_open+0x44b/0xec0 [ 1001.464469] ? fuse_open_common+0x290/0x290 [ 1001.468794] ? __inode_permission+0xcd/0x2f0 [ 1001.473705] vfs_open+0x105/0x220 [ 1001.477147] path_openat+0x628/0x2970 [ 1001.480925] ? path_lookupat+0x780/0x780 [ 1001.485681] ? trace_hardirqs_on+0x10/0x10 [ 1001.489926] do_filp_open+0x179/0x3c0 [ 1001.494235] ? may_open_dev+0xe0/0xe0 [ 1001.498023] ? lock_downgrade+0x740/0x740 [ 1001.502749] ? do_raw_spin_unlock+0x164/0x220 [ 1001.507240] ? _raw_spin_unlock+0x29/0x40 [ 1001.511366] ? __alloc_fd+0x1be/0x490 [ 1001.515941] do_sys_open+0x296/0x410 [ 1001.519646] ? filp_open+0x60/0x60 [ 1001.524429] ? do_syscall_64+0x4c/0x640 [ 1001.528391] ? compat_SyS_openat+0x30/0x30 [ 1001.533111] do_syscall_64+0x1d5/0x640 [ 1001.536991] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.542750] RIP: 0033:0x7f7214ce4509 [ 1001.546447] RSP: 002b:00007f7214c952f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 1001.554787] RAX: ffffffffffffffda RBX: 00007f7214d754c0 RCX: 00007f7214ce4509 [ 1001.562396] RDX: 00007f7214ce4509 RSI: 0000000000000000 RDI: 0000000020000400 [ 1001.569652] RBP: 00007f7214d42164 R08: 0000000000000000 R09: 0000000000000000 [ 1001.577433] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 1001.585066] R13: 00007f7214d3e158 R14: 00007f7214d40160 R15: 00007f7214d754c8 [ 1001.592673] [ 1001.592673] Showing all locks held in the system: [ 1001.598985] 1 lock held by khungtaskd/1525: [ 1001.603403] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1001.612544] 1 lock held by in:imklog/7688: [ 1001.616754] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 [ 1001.625251] 2 locks held by syz-executor356/7984: [ 1001.630074] #0: (sb_writers#10){.+.+}, at: [] mnt_want_write+0x3a/0xb0 [ 1001.638577] #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] fuse_open_common+0x1a4/0x290 [ 1001.648662] [ 1001.650267] ============================================= [ 1001.650267] [ 1001.657704] NMI backtrace for cpu 1 [ 1001.661324] CPU: 1 PID: 1525 Comm: khungtaskd Not tainted 4.14.277-syzkaller #0 [ 1001.668751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.678082] Call Trace: [ 1001.680654] dump_stack+0x1b2/0x281 [ 1001.684261] nmi_cpu_backtrace.cold+0x57/0x93 [ 1001.688789] ? irq_force_complete_move+0x350/0x350 [ 1001.693753] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 1001.699058] watchdog+0x5b9/0xb40 [ 1001.702489] ? hungtask_pm_notify+0x50/0x50 [ 1001.706809] kthread+0x30d/0x420 [ 1001.710149] ? kthread_create_on_node+0xd0/0xd0 [ 1001.714798] ret_from_fork+0x24/0x30 [ 1001.718586] Sending NMI from CPU 1 to CPUs 0: [ 1001.723370] NMI backtrace for cpu 0 [ 1001.723375] CPU: 0 PID: 4622 Comm: systemd-journal Not tainted 4.14.277-syzkaller #0 [ 1001.723378] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.723381] task: ffff8880a1684080 task.stack: ffff8880a1688000 [ 1001.723383] RIP: 0010:override_creds+0x31/0x270 [ 1001.723386] RSP: 0018:ffff8880a168fe40 EFLAGS: 00000246 [ 1001.723391] RAX: dffffc0000000000 RBX: ffff8880a1684080 RCX: 0000000000000000 [ 1001.723394] RDX: 1ffff110142d08e5 RSI: 0000000000000000 RDI: ffff8880a1684728 [ 1001.723397] RBP: ffff8880a9972f00 R08: 0000000000000000 R09: 0000000000000000 [ 1001.723400] R10: 0000000000000000 R11: ffff8880a1684080 R12: ffff8880a9972f14 [ 1001.723403] R13: dffffc0000000000 R14: 00000000ffffff9c R15: 000055bdcdb6e9a3 [ 1001.723407] FS: 00007f02177d18c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 1001.723409] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1001.723412] CR2: 00007f0214b9f000 CR3: 00000000a1699000 CR4: 00000000003406f0 [ 1001.723416] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1001.723419] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1001.723420] Call Trace: [ 1001.723423] SyS_faccessat+0x1f1/0x680 [ 1001.723425] ? SyS_fallocate+0x80/0x80 [ 1001.723427] ? do_syscall_64+0x4c/0x640 [ 1001.723429] ? SyS_faccessat+0x680/0x680 [ 1001.723431] do_syscall_64+0x1d5/0x640 [ 1001.723434] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.723436] RIP: 0033:0x7f0216a8c9c7 [ 1001.723438] RSP: 002b:00007fff648ab158 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 1001.723443] RAX: ffffffffffffffda RBX: 00007fff648ae180 RCX: 00007f0216a8c9c7 [ 1001.723447] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055bdcdb6e9a3 [ 1001.723450] RBP: 00007fff648ab2a0 R08: 000055bdcdb643e5 R09: 0000000000000018 [ 1001.723453] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 1001.723456] R13: 0000000000000000 R14: 000055bdcf4de8a0 R15: 00007fff648ab790 [ 1001.723458] Code: 53 e8 24 76 1d 00 48 b8 00 00 00 00 00 fc ff df 65 48 8b 1c 25 c0 7f 02 00 48 8d bb a8 06 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 03 02 00 00 4c 8b a3 a8 06 00 00 48 b8 00 00 00 00 00 fc [ 1001.724124] Kernel panic - not syncing: hung_task: blocked tasks [ 1001.932334] CPU: 1 PID: 1525 Comm: khungtaskd Not tainted 4.14.277-syzkaller #0 [ 1001.939754] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1001.949083] Call Trace: [ 1001.951651] dump_stack+0x1b2/0x281 [ 1001.955255] panic+0x1f9/0x42d [ 1001.958425] ? add_taint.cold+0x16/0x16 [ 1001.962405] ? printk_safe_flush+0xa9/0x110 [ 1001.966703] watchdog+0x5ca/0xb40 [ 1001.970129] ? hungtask_pm_notify+0x50/0x50 [ 1001.974431] kthread+0x30d/0x420 [ 1001.977769] ? kthread_create_on_node+0xd0/0xd0 [ 1001.982411] ret_from_fork+0x24/0x30 [ 1001.986270] Kernel Offset: disabled [ 1001.989881] Rebooting in 86400 seconds..