INFO: task syz-executor.0:5903 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28192 pid: 5903 ppid: 5891 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] fuse_flush+0x1de/0x5b0 fs/fuse/file.c:482 filp_close+0x96/0x120 fs/open.c:1280 __do_sys_close fs/open.c:1299 [inline] __se_sys_close fs/open.c:1297 [inline] __x64_sys_close+0x28/0x60 fs/open.c:1297 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7efffa07dd4b RSP: 002b:00007ffd6a1af6b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007efffa07dd4b RDX: 0000001b2bd20000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007efffa1df960 R08: 0000000000000000 R09: 00007ffd6a1ec090 R10: 000000000000305e R11: 0000000000000293 R12: 0000000000011997 R13: 00007ffd6a1af7b0 R14: 00007ffd6a1af7d0 R15: 0000000000000032 INFO: task syz-executor.0:5905 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27400 pid: 5905 ppid: 5891 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 fuse_wait_on_page_writeback fs/fuse/file.c:448 [inline] fuse_wait_on_page_writeback+0xf4/0x130 fs/fuse/file.c:444 fuse_launder_page fs/fuse/file.c:2307 [inline] fuse_launder_page+0xb5/0x100 fs/fuse/file.c:2297 do_launder_page mm/truncate.c:698 [inline] invalidate_inode_pages2_range+0x7f4/0xbd0 mm/truncate.c:770 fuse_finish_open+0x22a/0x4a0 fs/fuse/file.c:204 fuse_open_common+0x327/0x3b0 fs/fuse/file.c:256 do_dentry_open+0x42a/0xfb0 fs/open.c:817 do_open fs/namei.c:3254 [inline] path_openat+0x129c/0x2190 fs/namei.c:3371 do_filp_open+0x16d/0x390 fs/namei.c:3398 do_sys_openat2+0x11e/0x360 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_open fs/open.c:1196 [inline] __se_sys_open fs/open.c:1192 [inline] __x64_sys_open+0xfd/0x1a0 fs/open.c:1192 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7efffa0cb109 RSP: 002b:00007efff981f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007efffa1de030 RCX: 00007efffa0cb109 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007efffa12508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd6a1af64f R14: 00007efff981f300 R15: 0000000000022000 INFO: task syz-executor.0:5906 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28080 pid: 5906 ppid: 5891 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 io_schedule+0xba/0x130 kernel/sched/core.c:6852 wait_on_page_bit_common+0x2f3/0xa00 mm/filemap.c:1277 lock_page include/linux/pagemap.h:611 [inline] invalidate_inode_pages2_range+0x477/0xbd0 mm/truncate.c:746 fuse_finish_open+0x22a/0x4a0 fs/fuse/file.c:204 fuse_open_common+0x327/0x3b0 fs/fuse/file.c:256 do_dentry_open+0x42a/0xfb0 fs/open.c:817 do_open fs/namei.c:3254 [inline] path_openat+0x129c/0x2190 fs/namei.c:3371 do_filp_open+0x16d/0x390 fs/namei.c:3398 do_sys_openat2+0x11e/0x360 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_creat fs/open.c:1262 [inline] __se_sys_creat fs/open.c:1256 [inline] __x64_sys_creat+0xc3/0x110 fs/open.c:1256 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7efffa0cb109 RSP: 002b:00007efff97fe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007efffa1de100 RCX: 00007efffa0cb109 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 00007efffa12508d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd6a1af64f R14: 00007efff97fe300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1611: #0: ffffffff8a76ac00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 2 locks held by getty/5109: #0: ffff8880239c1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:266 #1: ffffc900016062e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x1e4/0x1740 drivers/tty/n_tty.c:2155 1 lock held by syz-executor.0/5903: #0: ffff88802f260150 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88802f260150 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: fuse_flush+0x1de/0x5b0 fs/fuse/file.c:482 2 locks held by syz-executor.0/5906: #0: ffff888027a6e460 (sb_writers#13){.+.+}-{0:0}, at: do_open fs/namei.c:3247 [inline] #0: ffff888027a6e460 (sb_writers#13){.+.+}-{0:0}, at: path_openat+0x15e7/0x2190 fs/namei.c:3371 #1: ffff88802f260150 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff88802f260150 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: fuse_open_common+0x202/0x3b0 fs/fuse/file.c:243 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1611 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x9a/0xcc lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0x951/0xc20 kernel/hung_task.c:294 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x161/0x1c0 drivers/acpi/processor_idle.c:516