INFO: task syz-executor.3:19352 blocked for more than 143 seconds.
      Not tainted 5.15.145-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:24992 pid:19352 ppid:  3561 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
 rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1047
 __down_read_common kernel/locking/rwsem.c:1231 [inline]
 __down_read kernel/locking/rwsem.c:1244 [inline]
 down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1490
 iterate_supers+0xac/0x1e0 fs/super.c:703
 quota_sync_all fs/quota/quota.c:68 [inline]
 __do_sys_quotactl fs/quota/quota.c:936 [inline]
 __se_sys_quotactl+0x347/0x770 fs/quota/quota.c:915
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fee360fbce9
RSP: 002b:00007fee3467d0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fee3621af80 RCX: 00007fee360fbce9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007fee3614847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fee3621af80 R15: 00007fff216b2708
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c91f220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3260:
 #0: ffff88814b5ab098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900024b32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
2 locks held by kworker/u4:15/23784:
1 lock held by syz-executor.5/16967:
 #0: ffff88801ee9a0e0 (&type->s_umount_key#106/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
1 lock held by syz-executor.5/17116:
 #0: ffff88814b2e80e0 (&type->s_umount_key#106/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
1 lock held by syz-executor.3/19352:
 #0: ffff88801ee9a0e0 (&type->s_umount_key#107){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703
2 locks held by syz-executor.1/24823:

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.145-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xe72/0xeb0 kernel/hung_task.c:295
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5083 Comm: syz-fuzzer Not tainted 5.15.145-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x7c/0x80 kernel/kcov.c:272
Code: 8d 42 28 4c 39 d0 77 22 89 f8 89 f6 48 c7 44 0a 08 01 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 49 ff c1 4c 89 09 <c3> 0f 1f 00 4c 8b 04 24 65 48 8b 15 64 45 82 7e 65 8b 05 65 45 82
RSP: 0000:ffffc90004e87998 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81acb566
RDX: ffff888078993b80 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffc90004e87ad0 R08: ffffffff81acb57f R09: fffff94000175827
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffd4000175820
R13: 0000000000000000 R14: ffffea0000bac100 R15: ffffea0000bac100
FS:  000000c04e96bc90(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c055a54000 CR3: 000000007a031000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 arch_atomic_dec_and_test arch/x86/include/asm/atomic.h:123 [inline]
 atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:543 [inline]
 page_ref_dec_and_test include/linux/page_ref.h:148 [inline]
 put_page_testzero include/linux/mm.h:748 [inline]
 release_pages+0x39f/0x1f40 mm/swap.c:931
 __pagevec_lru_add+0x1584/0x18d0 mm/swap.c:1056
 lru_cache_add+0x556/0x7e0 mm/swap.c:453
 do_anonymous_page mm/memory.c:3848 [inline]
 handle_pte_fault mm/memory.c:4619 [inline]
 __handle_mm_fault mm/memory.c:4756 [inline]
 handle_mm_fault+0x4aaa/0x5950 mm/memory.c:4854
 do_user_addr_fault arch/x86/mm/fault.c:1397 [inline]
 handle_page_fault arch/x86/mm/fault.c:1485 [inline]
 exc_page_fault+0x271/0x740 arch/x86/mm/fault.c:1541
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x46a571
Code: 66 89 07 66 89 44 1f fe c3 89 07 89 44 1f fc c3 48 89 07 c3 48 89 07 48 89 44 1f f8 c3 f3 44 0f 7f 3f f3 44 0f 7f 7c 1f f0 c3 <f3> 44 0f 7f 3f f3 44 0f 7f 7f 10 f3 44 0f 7f 7c 1f e0 f3 44 0f 7f
RSP: 002b:000000c0005a5100 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000040 RCX: 000000c04e96bc00
RDX: 00007fba9ce45108 RSI: 0000000000000000 RDI: 000000c055a54000
RBP: 000000c0005a5160 R08: 0000000000000001 R09: 0000000000000040
R10: 00007fba6aa4dc28 R11: 000000c055a54000 R12: 0000000000000001
R13: 0000000000000040 R14: 000000c000084d00 R15: 0100000000000000
 </TASK>