INFO: task syz-executor.1:15493 blocked for more than 143 seconds. Not tainted 5.10.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28536 pid:15493 ppid: 8585 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x893/0x2130 kernel/sched/core.c:4523 schedule+0xcf/0x270 kernel/sched/core.c:4601 rwsem_down_write_slowpath+0x603/0xc60 kernel/locking/rwsem.c:1235 __down_write kernel/locking/rwsem.c:1389 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1532 inode_lock include/linux/fs.h:774 [inline] open_last_lookups fs/namei.c:3175 [inline] path_openat+0x907/0x2730 fs/namei.c:3366 do_filp_open+0x17e/0x3c0 fs/namei.c:3396 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_creat fs/open.c:1258 [inline] __se_sys_creat fs/open.c:1252 [inline] __x64_sys_creat+0xc9/0x120 fs/open.c:1252 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45deb9 Code: Unable to access opcode bytes at RIP 0x45de8f. RSP: 002b:00007f46facb1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000002a00 RCX: 000000000045deb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020002100 RBP: 000000000118c0a8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118c07c R13: 000000000169fb7f R14: 00007f46facb29c0 R15: 000000000118c07c Showing all locks held in the system: 1 lock held by khungtaskd/1645: #0: ffffffff8b337160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6253 2 locks held by in:imklog/8206: #0: ffff888021d1eff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 #1: ffffffff8f0ab630 (&obj_hash[i].lock){-.-.}-{2:2}, at: is_bpf_text_address+0x0/0x160 kernel/bpf/core.c:695 3 locks held by syz-executor.1/15464: #0: ffff888011f02460 (sb_writers#15){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1648 [inline] #0: ffff888011f02460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:354 #1: ffff88802e990150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88802e990150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3175 [inline] #1: ffff88802e990150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x907/0x2730 fs/namei.c:3366 #2: ffff88802e990528 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xdf/0x120 fs/fuse/inode.c:418 2 locks held by syz-executor.1/15493: #0: ffff888011f02460 (sb_writers#15){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1648 [inline] #0: ffff888011f02460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:354 #1: ffff88802e990150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:774 [inline] #1: ffff88802e990150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3175 [inline] #1: ffff88802e990150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x907/0x2730 fs/namei.c:3366 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1645 Comm: khungtaskd Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xd43/0xfa0 kernel/hung_task.c:294 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c9/0x250 drivers/acpi/processor_idle.c:517