INFO: task syz-executor288:5070 blocked for more than 143 seconds.
      Not tainted 6.5.0-rc3-syzkaller-00016-g20ea1e7d13c1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor288 state:D stack:25896 pid:5070  ppid:5013   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1873/0x48f0 kernel/sched/core.c:6710
 schedule+0xc3/0x180 kernel/sched/core.c:6786
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
 rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
 inode_lock_nested include/linux/fs.h:806 [inline]
 filename_create+0x260/0x530 fs/namei.c:3886
 do_mkdirat+0xb7/0x520 fs/namei.c:4132
 __do_sys_mkdir fs/namei.c:4160 [inline]
 __se_sys_mkdir fs/namei.c:4158 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4158
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f15ac959a59
RSP: 002b:00007f15ac916218 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f15ac9e26c8 RCX: 00007f15ac959a59
RDX: 00007f15ac959a59 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f15ac9e26c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000014d8 R11: 0000000000000246 R12: 00007f15ac9e26cc
R13: 00007f15ac9ae0c0 R14: 0000000020004ac0 R15: 0030656c69662f2e
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8d328db0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8d329170 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
 #0: ffffffff8d328be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4765:
 #0: ffff88802d201098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2187
2 locks held by syz-executor288/5070:
 #0: ffff888023536410 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:403
 #1: ffff888078aec3b0 (&sb->s_type->i_mutex_key#14/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline]
 #1: ffff888078aec3b0 (&sb->s_type->i_mutex_key#14/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3886
3 locks held by syz-executor288/5071:

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc3-syzkaller-00016-g20ea1e7d13c1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xec2/0xf00 kernel/hung_task.c:379
 kthread+0x2b8/0x350 kernel/kthread.c:389
 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5071 Comm: syz-executor288 Not tainted 6.5.0-rc3-syzkaller-00016-g20ea1e7d13c1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:__sanitizer_cov_trace_cmp8+0x7c/0x80 kernel/kcov.c:285
Code: c1 e1 05 48 8d 41 28 4c 39 c8 77 1e 49 ff c2 4c 89 12 48 c7 44 11 08 06 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 <c3> 0f 1f 00 f3 0f 1e fa 4c 8b 04 24 65 48 8b 15 10 9d 77 7e 65 8b
RSP: 0018:ffffc900039cf4d8 EFLAGS: 00000093
RAX: 0000000000000000 RBX: 0000000000000080 RCX: ffff888021070000
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000080
RBP: ffffc900039cf638 R08: ffffffff8204a198 R09: 1ffffffff1d30b75
R10: dffffc0000000000 R11: fffffbfff1d30b76 R12: ffff8880752393a0
R13: 0000000000000080 R14: ffffffffffffffff R15: 0000000000037e00
FS:  00007f15a45156c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f0604e6c0 CR3: 000000001767f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lookup_bh_lru fs/buffer.c:1388 [inline]
 __find_get_block+0x1f8/0x10e0 fs/buffer.c:1415
 __getblk_gfp+0x2f/0x630 fs/buffer.c:1441
 __bread_gfp+0x2e/0x380 fs/buffer.c:1479
 sb_bread include/linux/buffer_head.h:351 [inline]
 __exfat_ent_get fs/exfat/fatent.c:48 [inline]
 exfat_ent_get+0x14d/0x400 fs/exfat/fatent.c:97
 exfat_readdir fs/exfat/dir.c:183 [inline]
 exfat_iterate+0x139b/0x3380 fs/exfat/dir.c:253
 iterate_dir+0x231/0x5a0
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f15ac959a59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f15a4515218 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f15ac9e26d8 RCX: 00007f15ac959a59
RDX: 0000000000000098 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f15ac9e26d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f15ac9e26dc
R13: 00007f15ac9ae0c0 R14: 0000000020004ac0 R15: 0030656c69662f2e
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.467 msecs