INFO: task syz-executor.3:16537 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc5-syzkaller-00329-g5d12ed4bea43 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:25752 pid:16537 tgid:16455 ppid:12654  flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x1796/0x4a00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
 inode_lock include/linux/fs.h:795 [inline]
 chown_common+0x3e1/0x850 fs/open.c:780
 do_fchownat+0x16d/0x250 fs/open.c:821
 __do_sys_fchownat fs/open.c:836 [inline]
 __se_sys_fchownat fs/open.c:833 [inline]
 __x64_sys_fchownat+0xb5/0xd0 fs/open.c:833
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f68cec7dea9
RSP: 002b:00007f68cf9810c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 00007f68cedac050 RCX: 00007f68cec7dea9
RDX: 000000000000ee00 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007f68cecca4a4 R08: 0000000000001000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f68cedac050 R15: 00007ffd483109a8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:4/61:
 #0: ffff888019b1c948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
 #0: ffff888019b1c948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x17c0 kernel/workqueue.c:3335
 #1: ffffc900015c7d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
 #1: ffffc900015c7d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x17c0 kernel/workqueue.c:3335
2 locks held by kworker/u8:6/2448:
1 lock held by udevd/4524:
2 locks held by getty/4822:
 #0: ffff88802af130a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/u8:8/5461:
 #0: ffff888019b1c948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline]
 #0: ffff888019b1c948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_scheduled_works+0x8e0/0x17c0 kernel/workqueue.c:3335
 #1: ffffc9000512fd00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline]
 #1: ffffc9000512fd00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91b/0x17c0 kernel/workqueue.c:3335
3 locks held by syz-executor.3/16456:
2 locks held by syz-executor.3/16537:
 #0: ffff88806c5ee420 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
 #1: ffff88823bcf4cb0 (&sb->s_type->i_mutex_key#33){++++}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
 #1: ffff88823bcf4cb0 (&sb->s_type->i_mutex_key#33){++++}-{3:3}, at: chown_common+0x3e1/0x850 fs/open.c:780
2 locks held by syz-executor.1/17990:
 #0: ffff88806c5ee0e0 (&type->s_umount_key#63){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88806c5ee0e0 (&type->s_umount_key#63){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff888064eec0e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
2 locks held by syz-executor.1/19299:
2 locks held by syz-executor.0/21444:
 #0: ffff88806c5ee0e0 (&type->s_umount_key#63){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88806c5ee0e0 (&type->s_umount_key#63){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff888064eec0e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
2 locks held by syz-executor.0/22141:
 #0: ffff88806c5ee0e0 (&type->s_umount_key#63){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88806c5ee0e0 (&type->s_umount_key#63){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
 #1: ffff888064eec0e0 (&sbi->s_lock#2){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
1 lock held by syz-executor.3/22212:

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00329-g5d12ed4bea43 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfde/0x1020 kernel/hung_task.c:380
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4513 Comm: klogd Not tainted 6.9.0-rc5-syzkaller-00329-g5d12ed4bea43 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:mutex_unlock+0x8/0x10 kernel/locking/mutex.c:548
Code: e7 e8 7c 3d 76 f6 e9 f1 fe ff ff e8 a2 6c f6 ff 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <eb> 16 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0000:ffffc9000378fab8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88807c9b5a00
RDX: 0000000000000000 RSI: ffffffff8176099e RDI: ffffffff8e2106c0
RBP: ffffc9000378fd30 R08: ffffffff81760984 R09: 3737393632362e31
R10: 5b5d373739363236 R11: 205d393254202020 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000071
FS:  00007f81497e7380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d69024000 CR3: 000000007c3a0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 syslog_print+0x77e/0x9c0 kernel/printk/printk.c:1632
 do_syslog+0x3bb/0x810 kernel/printk/printk.c:1734
 __do_sys_syslog kernel/printk/printk.c:1826 [inline]
 __se_sys_syslog kernel/printk/printk.c:1824 [inline]
 __x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1824
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8149948fa7
Code: 73 01 c3 48 8b 0d 81 ce 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 ce 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc8712b378 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007f8149ae74a0 RCX: 00007f8149948fa7
RDX: 00000000000003ff RSI: 00007f8149ae74a0 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: b390bf3b60894ed6
R10: 0000000000004000 R11: 0000000000000206 R12: 00007f8149ae74a0
R13: 00007f8149ad7212 R14: 00007f8149ae7503 R15: 00007f8149ae7503
 </TASK>