INFO: task syz.0.26:5275 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.26        state:D stack:26704 pid: 5275 ppid:  5259 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 rwsem_down_write_slowpath+0xc87/0x1260 kernel/locking/rwsem.c:1165
 user_get_super+0xcd/0x240 fs/super.c:848
 quotactl_block fs/quota/quota.c:889 [inline]
 __do_sys_quotactl fs/quota/quota.c:953 [inline]
 __se_sys_quotactl+0x46f/0x6f0 fs/quota/quota.c:915
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fbc831a0079
RSP: 002b:00007fbc82405028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fbc833ccfa0 RCX: 00007fbc831a0079
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: ffffffff80000302
RBP: 00007fbc83232a4c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbc833ccfa0 R15: 00007ffd94ddba28
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u4:0/9:
1 lock held by khungtaskd/27:
 #0: ffffffff8c31eaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3951:
 #0: ffff88814d431098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc90002d042e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158
3 locks held by syz.0.16/5042:
3 locks held by syz.1.17/5060:
3 locks held by syz.2.18/5077:
3 locks held by syz.3.19/5098:
3 locks held by syz.4.20/5122:
3 locks held by syz.5.21/5146:
5 locks held by syz.6.22/5177:
3 locks held by syz.7.23/5200:
3 locks held by syz.8.24/5226:
3 locks held by syz.9.25/5256:
1 lock held by syz.0.26/5275:
 #0: ffff88807bc880e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: user_get_super+0xcd/0x240 fs/super.c:848
1 lock held by syz.1.27/5298:
 #0: ffff88801a78a0e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: user_get_super+0xcd/0x240 fs/super.c:848
1 lock held by syz.2.28/5315:
 #0: ffff8880780580e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: user_get_super+0xcd/0x240 fs/super.c:848
1 lock held by syz.3.29/5340:
 #0: ffff88807b4ce0e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: user_get_super+0xcd/0x240 fs/super.c:848
1 lock held by syz-executor189/5371:
 #0: ffff88807bc880e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: user_get_super+0xcd/0x240 fs/super.c:848
1 lock held by syz.4.30/5375:
 #0: ffff88805aefe0e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: user_get_super+0xcd/0x240 fs/super.c:848

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

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xe0f/0xe50 kernel/hung_task.c:369
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 144 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:get_current kernel/kcov.c:966 [inline]
RIP: 0010:kcov_remote_stop+0x0/0x4c0 kernel/kcov.c:967
Code: 49 89 ce 48 89 d9 45 89 c4 41 89 e8 45 89 cd 4d 89 f1 e8 b3 ea 86 02 4c 89 fe 89 ea 4c 89 f1 48 89 df 45 89 e9 45 89 e0 eb 8c <55> 41 57 41 56 41 55 41 54 53 48 83 ec 30 65 4c 8b 3d ea 41 89 7e
RSP: 0018:ffffc900016dfb78 EFLAGS: 00000286
RAX: 6983760428873000 RBX: dffffc0000000000 RCX: 6983760428873000
RDX: dffffc0000000000 RSI: ffffffff8a79f960 RDI: ffffffff8a79f920
RBP: ffff88805ed05b40 R08: ffffffff901d412f R09: 1ffffffff203a825
R10: dffffc0000000000 R11: fffffbfff203a826 R12: ffff88807b2b0c80
R13: 0000000000000080 R14: 0000000000000001 R15: ffff88807b2b17c0
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564e2ffca168 CR3: 00000000226f2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_iface_work+0x79d/0xc60 net/mac80211/iface.c:1516
 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:433
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>