INFO: task syz.4.79:6818 blocked for more than 143 seconds.
      Not tainted 6.11.0-rc4-syzkaller-gbe6d853c7631 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.79        state:D stack:0     pid:6818  tgid:6814  ppid:6406   flags:0x00000009
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x13d4/0x2418 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6621
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6678
 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
 __mutex_lock kernel/locking/mutex.c:752 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
 __fdget_pos+0x218/0x2a4 fs/file.c:1187
 fdget_pos include/linux/file.h:76 [inline]
 ksys_read+0x8c/0x26c fs/read_write.c:610
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __arm64_sys_read+0x7c/0x90 fs/read_write.c:627
 __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:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Showing all locks held in the system:
4 locks held by kworker/u8:1/13:
1 lock held by khungtaskd/31:
 #0: ffff80008f6edb60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:325
2 locks held by getty/6153:
 #0: ffff0000d21dd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009836e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211
2 locks held by syz.4.79/6815:
1 lock held by syz.4.79/6818:
 #0: ffff0000d3b225c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1187
2 locks held by syz.1.435/8631:
1 lock held by syz.1.435/8634:
 #0: ffff0000cc382d48 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1187
2 locks held by kworker/u8:12/9025:
2 locks held by syz.2.552/9139:
1 lock held by syz.2.552/9155:
 #0: ffff00018c671c48 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x218/0x2a4 fs/file.c:1187
2 locks held by syz.2.782/9959:
2 locks held by syz.0.786/9964:
3 locks held by syz.3.788/9973:

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