Warning: Permanently added '10.128.1.27' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 857.933097] INFO: task syz-executor358:7982 blocked for more than 140 seconds. [ 857.940629] Not tainted 4.14.302-syzkaller #0 [ 857.947647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 857.955676] syz-executor358 D28560 7982 7980 0x00000004 [ 857.961310] Call Trace: [ 857.964067] __schedule+0x88b/0x1de0 [ 857.967783] ? lock_acquire+0x170/0x3f0 [ 857.971757] ? io_schedule_timeout+0x140/0x140 [ 857.976392] ? _raw_spin_unlock+0x29/0x40 [ 857.980567] ? fuse_writepage_locked+0xe80/0xe80 [ 857.985415] schedule+0x8d/0x1b0 [ 857.988793] fuse_wait_on_page_writeback.isra.0+0xdc/0x120 [ 857.994655] ? fuse_do_ioctl+0x1570/0x1570 [ 857.998890] ? end_page_writeback+0xe3/0x1c0 [ 858.003381] ? wait_woken+0x230/0x230 [ 858.007184] fuse_launder_page+0xa2/0xd0 [ 858.011263] invalidate_inode_pages2_range+0x547/0xc00 [ 858.016729] ? clear_shadow_entry+0x160/0x160 [ 858.021236] ? fuse_range_is_writeback+0x1f0/0x1f0 [ 858.026255] ? fuse_file_alloc+0x1ca/0x260 [ 858.030487] ? _raw_spin_unlock+0x29/0x40 [ 858.034685] ? fuse_do_open+0x18e/0x460 [ 858.038792] fuse_finish_open+0x262/0x500 [ 858.043008] fuse_open_common+0x234/0x290 [ 858.047148] do_dentry_open+0x44b/0xec0 [ 858.051100] ? fuse_open_common+0x290/0x290 [ 858.055497] ? __inode_permission+0xcd/0x2f0 [ 858.059899] vfs_open+0x105/0x220 [ 858.063395] path_openat+0x628/0x2970 [ 858.067197] ? path_lookupat+0x780/0x780 [ 858.071282] ? trace_hardirqs_on+0x10/0x10 [ 858.076091] do_filp_open+0x179/0x3c0 [ 858.079885] ? may_open_dev+0xe0/0xe0 [ 858.083723] ? lock_downgrade+0x740/0x740 [ 858.087861] ? do_raw_spin_unlock+0x164/0x220 [ 858.092346] ? _raw_spin_unlock+0x29/0x40 [ 858.096521] ? __alloc_fd+0x1be/0x490 [ 858.100398] do_sys_open+0x296/0x410 [ 858.104146] ? filp_open+0x60/0x60 [ 858.107676] ? do_syscall_64+0x4c/0x640 [ 858.111625] ? compat_SyS_openat+0x30/0x30 [ 858.115885] do_syscall_64+0x1d5/0x640 [ 858.119764] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 858.125106] RIP: 0033:0x7ffa6ed654c9 [ 858.128919] RSP: 002b:00007ffa6ed162f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 858.136856] RAX: ffffffffffffffda RBX: 00007ffa6edf64c0 RCX: 00007ffa6ed654c9 [ 858.144177] RDX: 00007ffa6ed654c9 RSI: 0000000000000000 RDI: 00000000200001c0 [ 858.151438] RBP: 00007ffa6edc3164 R08: 0000000000000000 R09: 0000000000000000 [ 858.158742] R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e [ 858.166324] R13: 00007ffa6edbf158 R14: 00007ffa6edc1160 R15: 00007ffa6edf64c8 [ 858.173679] [ 858.173679] Showing all locks held in the system: [ 858.179992] 1 lock held by khungtaskd/1534: [ 858.184472] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 858.193626] 1 lock held by in:imklog/7775: [ 858.197847] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 [ 858.206557] 2 locks held by syz-executor358/7982: [ 858.211840] #0: (sb_writers#10){.+.+}, at: [] mnt_want_write+0x3a/0xb0 [ 858.220408] #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] fuse_open_common+0x1a4/0x290 [ 858.230496] [ 858.232179] ============================================= [ 858.232179] [ 858.239774] NMI backtrace for cpu 1 [ 858.243596] CPU: 1 PID: 1534 Comm: khungtaskd Not tainted 4.14.302-syzkaller #0 [ 858.251031] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 858.260390] Call Trace: [ 858.262966] dump_stack+0x1b2/0x281 [ 858.266659] nmi_cpu_backtrace.cold+0x57/0x93 [ 858.271132] ? irq_force_complete_move+0x350/0x350 [ 858.276132] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 858.281389] watchdog+0x5b9/0xb40 [ 858.284828] ? hungtask_pm_notify+0x50/0x50 [ 858.289126] kthread+0x30d/0x420 [ 858.292472] ? kthread_create_on_node+0xd0/0xd0 [ 858.297115] ret_from_fork+0x24/0x30 [ 858.300990] Sending NMI from CPU 1 to CPUs 0: [ 858.305922] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff8724bc2e [ 858.306867] Kernel panic - not syncing: hung_task: blocked tasks [ 858.319454] CPU: 1 PID: 1534 Comm: khungtaskd Not tainted 4.14.302-syzkaller #0 [ 858.326907] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 858.336252] Call Trace: [ 858.338939] dump_stack+0x1b2/0x281 [ 858.342567] panic+0x1f9/0x42d [ 858.345745] ? add_taint.cold+0x16/0x16 [ 858.349733] ? printk_safe_flush+0xa9/0x110 [ 858.354052] watchdog+0x5ca/0xb40 [ 858.357494] ? hungtask_pm_notify+0x50/0x50 [ 858.361879] kthread+0x30d/0x420 [ 858.365221] ? kthread_create_on_node+0xd0/0xd0 [ 858.369867] ret_from_fork+0x24/0x30 [ 858.373917] Kernel Offset: disabled [ 858.377673] Rebooting in 86400 seconds..