Warning: Permanently added '10.128.1.50' (ECDSA) to the list of known hosts. executing program [ 857.973729] INFO: task syz-executor407:7979 blocked for more than 140 seconds. [ 857.981261] Not tainted 4.14.302-syzkaller #0 [ 857.986555] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 857.994588] syz-executor407 D28560 7979 7977 0x00000004 [ 858.000215] Call Trace: [ 858.002790] __schedule+0x88b/0x1de0 [ 858.006534] ? lock_acquire+0x170/0x3f0 [ 858.010589] ? io_schedule_timeout+0x140/0x140 [ 858.015227] ? _raw_spin_unlock+0x29/0x40 [ 858.019374] ? fuse_writepage_locked+0xe80/0xe80 [ 858.024171] schedule+0x8d/0x1b0 [ 858.027529] fuse_wait_on_page_writeback.isra.0+0xdc/0x120 [ 858.033218] ? fuse_do_ioctl+0x1570/0x1570 [ 858.037528] ? end_page_writeback+0xe3/0x1c0 [ 858.042022] ? wait_woken+0x230/0x230 [ 858.045873] fuse_launder_page+0xa2/0xd0 [ 858.049928] invalidate_inode_pages2_range+0x547/0xc00 [ 858.055242] ? clear_shadow_entry+0x160/0x160 [ 858.059730] ? fuse_range_is_writeback+0x1f0/0x1f0 [ 858.064694] ? fuse_file_alloc+0x1ca/0x260 [ 858.068929] ? _raw_spin_unlock+0x29/0x40 [ 858.073054] ? fuse_do_open+0x18e/0x460 [ 858.077065] fuse_finish_open+0x262/0x500 [ 858.081203] fuse_open_common+0x234/0x290 [ 858.085393] do_dentry_open+0x44b/0xec0 [ 858.089355] ? fuse_open_common+0x290/0x290 [ 858.093707] ? __inode_permission+0xcd/0x2f0 [ 858.098112] vfs_open+0x105/0x220 [ 858.101543] path_openat+0x628/0x2970 [ 858.105385] ? path_lookupat+0x780/0x780 [ 858.109438] ? trace_hardirqs_on+0x10/0x10 [ 858.113710] do_filp_open+0x179/0x3c0 [ 858.117500] ? may_open_dev+0xe0/0xe0 [ 858.121282] ? lock_downgrade+0x740/0x740 [ 858.125463] ? do_raw_spin_unlock+0x164/0x220 [ 858.129952] ? _raw_spin_unlock+0x29/0x40 [ 858.134130] ? __alloc_fd+0x1be/0x490 [ 858.137925] do_sys_open+0x296/0x410 [ 858.141616] ? filp_open+0x60/0x60 [ 858.145190] ? do_syscall_64+0x4c/0x640 [ 858.149153] ? compat_SyS_openat+0x30/0x30 [ 858.153364] do_syscall_64+0x1d5/0x640 [ 858.157291] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 858.162468] RIP: 0033:0x7f27b32c84c9 [ 858.166212] RSP: 002b:00007f27b32792f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 858.173963] RAX: ffffffffffffffda RBX: 00007f27b33594c0 RCX: 00007f27b32c84c9 [ 858.181218] RDX: 00007f27b32c84c9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 858.188523] RBP: 00007f27b3326164 R08: 0000000000000000 R09: 0000000000000000 [ 858.195834] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 858.203186] R13: 00007f27b3322158 R14: 00007f27b3324160 R15: 00007f27b33594c8 [ 858.210509] [ 858.210509] Showing all locks held in the system: [ 858.216908] 1 lock held by khungtaskd/1533: [ 858.221285] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 858.230389] 2 locks held by syz-executor407/7979: [ 858.235284] #0: (sb_writers#10){.+.+}, at: [] mnt_want_write+0x3a/0xb0 [ 858.243774] #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] fuse_open_common+0x1a4/0x290 [ 858.253817] [ 858.255433] ============================================= [ 858.255433] [ 858.262420] NMI backtrace for cpu 0 [ 858.266098] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.302-syzkaller #0 [ 858.273534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 858.282891] Call Trace: [ 858.285461] dump_stack+0x1b2/0x281 [ 858.289063] nmi_cpu_backtrace.cold+0x57/0x93 [ 858.293537] ? irq_force_complete_move+0x350/0x350 [ 858.298444] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 858.303699] watchdog+0x5b9/0xb40 [ 858.307128] ? hungtask_pm_notify+0x50/0x50 [ 858.311426] kthread+0x30d/0x420 [ 858.314775] ? kthread_create_on_node+0xd0/0xd0 [ 858.319421] ret_from_fork+0x24/0x30 [ 858.323191] Sending NMI from CPU 0 to CPUs 1: [ 858.327777] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff8724bc2e [ 858.328730] Kernel panic - not syncing: hung_task: blocked tasks [ 858.341119] CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.302-syzkaller #0 [ 858.348539] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 858.359693] Call Trace: [ 858.362262] dump_stack+0x1b2/0x281 [ 858.365880] panic+0x1f9/0x42d [ 858.369049] ? add_taint.cold+0x16/0x16 [ 858.372998] ? printk_safe_flush+0xa9/0x110 [ 858.377293] watchdog+0x5ca/0xb40 [ 858.380807] ? hungtask_pm_notify+0x50/0x50 [ 858.385102] kthread+0x30d/0x420 [ 858.388445] ? kthread_create_on_node+0xd0/0xd0 [ 858.393088] ret_from_fork+0x24/0x30 [ 858.397061] Kernel Offset: disabled [ 858.400677] Rebooting in 86400 seconds..