INFO: task syz.0.3624:20739 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.3624 state:D stack:23912 pid:20739 tgid:20738 ppid:17313 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5263 [inline]
__schedule+0x1836/0x4ed0 kernel/sched/core.c:6871
__schedule_loop kernel/sched/core.c:6953 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6968
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7025
rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write_nested+0x1b5/0x200 kernel/locking/rwsem.c:1707
inode_lock_nested include/linux/fs.h:1072 [inline]
lock_rename fs/namei.c:3681 [inline]
__start_renaming+0x148/0x410 fs/namei.c:3777
do_renameat2+0x399/0x8e0 fs/namei.c:5991
__do_sys_rename fs/namei.c:6059 [inline]
__se_sys_rename fs/namei.c:6057 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:6057
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe7eef8f749
RSP: 002b:00007fe7efe57038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fe7ef1e5fa0 RCX: 00007fe7eef8f749
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 00002000000003c0
RBP: 00007fe7ef013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7ef1e6038 R14: 00007fe7ef1e5fa0 R15: 00007ffdedbf8d08
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8df3d9c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3d9c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8df3d9c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5594:
#0: ffff88803422d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz.0.3624/20739:
#0: ffff88807aed0420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:509
#1: ffff8880511ff818 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
#1: ffff8880511ff818 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3681 [inline]
#1: ffff8880511ff818 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: __start_renaming+0x148/0x410 fs/namei.c:3777
3 locks held by syz.0.3624/20766:
2 locks held by syz.6.4059/22524:
#0: ffff888058e2f508 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
#0: ffff888058e2f508 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: __sock_release net/socket.c:661 [inline]
#0: ffff888058e2f508 (&sb->s_type->i_mutex_key#12){+.+.}-{4:4}, at: sock_close+0x9b/0x240 net/socket.c:1459
#1: ffffffff8df43478 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#1: ffffffff8df43478 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:957
1 lock held by syz.3.4060/22525:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xfb5/0x1000 kernel/hung_task.c:515
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20766 Comm: syz.0.3624 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:lock_release+0x80/0x3d0 kernel/locking/lockdep.c:5881
Code: 9a df 0d 00 0f 84 44 02 00 00 65 8b 05 89 34 d8 10 85 c0 0f 85 35 02 00 00 65 4c 8b 3c 25 08 70 76 92 41 83 bf 2c 0b 00 00 00 <0f> 85 1e 02 00 00 49 81 3e 80 23 3a 93 0f 84 11 02 00 00 48 c7 44
RSP: 0018:ffffc9000b8a7618 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880511ff008 RCX: 46d36e7ce5ea6000
RDX: ffff88802ea43d00 RSI: ffffffff8bbf80c0 RDI: ffffffff8bbf8080
RBP: 0000000000000000 R08: ffff8880511ff18b R09: 1ffff1100a23fe31
R10: dffffc0000000000 R11: ffffed100a23fe32 R12: ffff8880511fef88
R13: ffffffff8241b36c R14: ffff8880511ff020 R15: ffff88802ea43d00
FS: 00007fe7efe366c0(0000) GS:ffff888125fb9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555594cdb5c8 CR3: 000000007c7e0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 3a810b1eb6134bdc DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
insert_inode_locked+0x2cc/0x5d0 fs/inode.c:1865
ntfs_new_inode+0xc8/0x100 fs/ntfs3/fsntfs.c:1675
ntfs_create_inode+0x606/0x32a0 fs/ntfs3/inode.c:1309
ntfs_create+0x3d/0x50 fs/ntfs3/namei.c:110
lookup_open fs/namei.c:4409 [inline]
open_last_lookups fs/namei.c:4509 [inline]
path_openat+0x190f/0x3d90 fs/namei.c:4753
do_filp_open+0x1fa/0x410 fs/namei.c:4783
do_sys_openat2+0x121/0x1c0 fs/open.c:1432
do_sys_open fs/open.c:1447 [inline]
__do_sys_openat fs/open.c:1463 [inline]
__se_sys_openat fs/open.c:1458 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1458
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe7eef8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe7efe36038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fe7ef1e6090 RCX: 00007fe7eef8f749
RDX: 000000000000275a RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007fe7ef013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7ef1e6128 R14: 00007fe7ef1e6090 R15: 00007ffdedbf8d08