INFO: task syz-executor.1:24355 blocked for more than 144 seconds.
      Not tainted 6.9.0-syzkaller-05151-g1b294a1f3561 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:27840 pid:24355 tgid:24352 ppid:23254  flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6838
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
 rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x124/0x330 kernel/locking/rwsem.c:1528
 inode_lock_shared include/linux/fs.h:801 [inline]
 lookup_slow fs/namei.c:1708 [inline]
 walk_component+0x342/0x5b0 fs/namei.c:2004
 lookup_last fs/namei.c:2469 [inline]
 path_lookupat+0x17f/0x770 fs/namei.c:2493
 filename_lookup+0x1e5/0x5b0 fs/namei.c:2522
 user_path_at_empty+0x42/0x60 fs/namei.c:2929
 user_path_at include/linux/namei.h:58 [inline]
 do_mount fs/namespace.c:3689 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x1ff/0x320 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb83fa7cee9
RSP: 002b:00007fb83f5de0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb83fbac050 RCX: 00007fb83fa7cee9
RDX: 0000000020000040 RSI: 00000000200006c0 RDI: 0000000020000080
RBP: 00007fb83fac949e R08: 0000000020000000 R09: 0000000000000000
R10: 0000000001002080 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb83fbac050 R15: 00007ffed0d33378
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffffffff8dbb1ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8dbb1ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8dbb1ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:4/62:
2 locks held by getty/4844:
 #0: ffff88802af540a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.2/23202:
2 locks held by syz-executor.1/24353:
1 lock held by syz-executor.1/24355:
 #0: ffff8880510c0188 (&type->i_mutex_dir_key#28){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:801 [inline]
 #0: ffff8880510c0188 (&type->i_mutex_dir_key#28){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
 #0: ffff8880510c0188 (&type->i_mutex_dir_key#28){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.0/24794:
 #0: ffff8880510c06d0 (&type->i_mutex_dir_key#28){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:801 [inline]
 #0: ffff8880510c06d0 (&type->i_mutex_dir_key#28){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
 #0: ffff8880510c06d0 (&type->i_mutex_dir_key#28){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
2 locks held by syz-executor.0/24795:
1 lock held by syz-executor.4/25565:
1 lock held by syz-executor.1/25587:
 #0: ffff88803c5194a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline]
 #0: ffff88803c5194a0 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x160/0x3c0 mm/util.c:571
1 lock held by syz-executor.1/25599:
2 locks held by syz-executor.0/25609:
 #0: ffffffff8da80388 (sched_core_mutex){+.+.}-{3:3}, at: sched_core_get+0x3f/0xa0 kernel/sched/core.c:420
 #1: ffffffff8dbbd278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:291
1 lock held by syz-executor.0/25611:
1 lock held by syz-executor.3/25607:

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

NMI backtrace for cpu 0
CPU: 0 PID: 31 Comm: khungtaskd Not tainted 6.9.0-syzkaller-05151-g1b294a1f3561 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf86/0x1240 kernel/hung_task.c:380
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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: 25565 Comm: syz-executor.4 Not tainted 6.9.0-syzkaller-05151-g1b294a1f3561 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x15/0x20 kernel/kcov.c:290
Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 0c 24 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 <e9> 86 fe ff ff 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000333f6a0 EFLAGS: 00000246
RAX: 0000000000000011 RBX: 0000000000000000 RCX: ffffffff81d2b625
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000011 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: ffff88803c51c280
R13: ffffea0001116780 R14: dffffc0000000000 R15: ffff88805db95980
FS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f49afdae000 CR3: 00000000416ce000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 zap_present_folio_ptes mm/memory.c:1478 [inline]
 zap_present_ptes mm/memory.c:1563 [inline]
 zap_pte_range mm/memory.c:1605 [inline]
 zap_pmd_range mm/memory.c:1722 [inline]
 zap_pud_range mm/memory.c:1751 [inline]
 zap_p4d_range mm/memory.c:1772 [inline]
 unmap_page_range+0x1125/0x3c10 mm/memory.c:1793
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1839
 unmap_vmas+0x22f/0x490 mm/memory.c:1883
 exit_mmap+0x1c1/0xb90 mm/mmap.c:3269
 __mmput+0x12a/0x4d0 kernel/fork.c:1346
 mmput+0x62/0x70 kernel/fork.c:1368
 exit_mm kernel/exit.c:569 [inline]
 do_exit+0x999/0x2c10 kernel/exit.c:865
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
 get_signal+0x2616/0x2710 kernel/signal.c:2911
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f183e07e5ea
Code: Unable to access opcode bytes at 0x7f183e07e5c0.
RSP: 002b:00007f183ed22ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: 0000000000000000 RBX: 00007f183ed22f80 RCX: 00007f183e07e5ea
RDX: 0000000020009600 RSI: 0000000020009640 RDI: 00007f183ed22f40
RBP: 0000000020009600 R08: 00007f183ed22f80 R09: 0000000000200800
R10: 0000000000200800 R11: 0000000000000202 R12: 0000000020009640
R13: 00007f183ed22f40 R14: 0000000000009606 R15: 0000000020001340
 </TASK>