INFO: task syz.6.912:10050 blocked for more than 144 seconds.
      Not tainted 6.14.0-rc7-syzkaller-gcc8f508710d1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.912       state:D stack:0     pid:10050 tgid:10049 ppid:7053   task_flags:0x400140 flags:0x00000001
Call trace:
 __switch_to+0x414/0x788 arch/arm64/kernel/process.c:701 (T)
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x1360/0x257c kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6857
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6914
 __mutex_lock_common+0xd30/0x24b8 kernel/locking/mutex.c:662
 __mutex_lock kernel/locking/mutex.c:730 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782
 __lru_add_drain_all+0x88/0x50c mm/swap.c:830
 lru_add_drain_all+0x18/0x24 mm/swap.c:883
 madvise_collapse+0x220/0xbcc mm/khugepaged.c:2764
 madvise_vma_behavior mm/madvise.c:1330 [inline]
 madvise_walk_vmas mm/madvise.c:1511 [inline]
 do_madvise+0x1708/0x3608 mm/madvise.c:1698
 __do_sys_madvise mm/madvise.c:1714 [inline]
 __se_sys_madvise mm/madvise.c:1712 [inline]
 __arm64_sys_madvise+0xa4/0xc0 mm/madvise.c:1712
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffff80008fda2620 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336
1 lock held by khugepaged/37:
3 locks held by kworker/u8:2/44:
3 locks held by kworker/u8:3/45:
2 locks held by kworker/u8:4/62: