INFO: task syz-executor.4:6789 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:0     pid:6789  tgid:6789  ppid:6277   flags:0x0000000d
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x14b8/0x24e8 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6838
 coredump_task_exit+0x2a8/0x3e4 kernel/exit.c:439
 do_exit+0x1b0/0x1ac8 kernel/exit.c:832
 do_group_exit+0x194/0x22c kernel/exit.c:1027
 get_signal+0x1414/0x1530 kernel/signal.c:2911
 do_signal+0x238/0x3e8c arch/arm64/kernel/signal.c:1308
 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713
 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:
1 lock held by khungtaskd/30:
 #0: ffff80008f087940 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:328
2 locks held by kworker/u8:10/4208:
2 locks held by getty/6007:
 #0: ffff0000d6eb90a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800097bdb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.4/6790:
 #0: ffff0000f2adc420 (sb_writers#13){.+.+}-{0:0}, at: do_coredump+0x1518/0x23cc fs/coredump.c:763
2 locks held by syz-executor.0/9362:
 #0: ffff0000f2adc0e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff0000f2adc0e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120
 #1: ffff0000f2adc940 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2603 [inline]
 #1: ffff0000f2adc940 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x2a8/0x944 fs/fs-writeback.c:2786
7 locks held by syz-executor.0/9520:
 #0: ffff0000d7e80420 (sb_writers#7){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2855 [inline]
 #0: ffff0000d7e80420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x368/0xc3c fs/read_write.c:586
 #1: ffff0000c855dc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1c8/0x48c fs/kernfs/file.c:325
 #2: ffff0000c57b4878 (kn->active#46){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1e4/0x48c fs/kernfs/file.c:326
 #3: ffff800090e1a168 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xec/0x39c drivers/net/netdevsim/bus.c:216
 #4: ffff0000d48a40e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #4: ffff0000d48a40e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1093 [inline]
 #4: ffff0000d48a40e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xbc/0x6a0 drivers/base/dd.c:1290
 #5: ffff0000d48a5250 (&devlink->lock_key#14){+.+.}-{3:3}, at: devl_lock+0x24/0x34 net/devlink/core.c:276
 #6: ffff80008f08cb40 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x58/0x534 kernel/rcu/tree.c:4073
2 locks held by syz-executor.3/9576:
 #0: ffff0000f2adc0e0 (&type->s_umount_key#55){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff0000f2adc0e0 (&type->s_umount_key#55){++++}-{3:3}, at: super_lock+0x244/0x33c fs/super.c:120
 #1: ffff0000f2adc940 (&s->s_sync_lock){+.+.}-{3:3}, at: wait_sb_inodes fs/fs-writeback.c:2603 [inline]
 #1: ffff0000f2adc940 (&s->s_sync_lock){+.+.}-{3:3}, at: sync_inodes_sb+0x2a8/0x944 fs/fs-writeback.c:2786
2 locks held by syz-executor.2/9591:

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