INFO: task syz-executor.0:20474 blocked for more than 143 seconds. Not tainted 6.8.0-rc3-syzkaller-gf735966ee23c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:0 pid:20474 tgid:20470 ppid:20254 flags:0x00000005 Call trace: __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5400 [inline] __schedule+0x1498/0x24b4 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xb8/0x19c kernel/sched/core.c:6817 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6874 rwsem_down_write_slowpath+0xcfc/0x1aa0 kernel/locking/rwsem.c:1178 __down_write_common kernel/locking/rwsem.c:1306 [inline] __down_write kernel/locking/rwsem.c:1315 [inline] down_write+0xb4/0xc0 kernel/locking/rwsem.c:1580 __super_lock fs/super.c:56 [inline] super_lock+0x208/0x33c fs/super.c:120 super_lock_excl fs/super.c:145 [inline] grab_super+0xac/0x2e8 fs/super.c:534 sget_fc+0x1b0/0x648 fs/super.c:793 vfs_get_super fs/super.c:1268 [inline] get_tree_single+0x40/0x148 fs/super.c:1300 efivarfs_get_tree+0x28/0x38 fs/efivarfs/super.c:356 vfs_get_tree+0x90/0x288 fs/super.c:1784 vfs_cmd_create+0xf4/0x214 fs/fsopen.c:230 __do_sys_fsconfig fs/fsopen.c:476 [inline] __se_sys_fsconfig fs/fsopen.c:349 [inline] __arm64_sys_fsconfig+0x7c8/0xc40 fs/fsopen.c:349 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffff80008ee43fc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:297 2 locks held by kworker/0:2/1792: #0: ffff0000c0036938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x560/0x1204 kernel/workqueue.c:2606 #1: ffff80009c3f7c20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x5a0/0x1204 kernel/workqueue.c:2608 2 locks held by getty/5933: #0: ffff0000d378a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800093f902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.4/6209: #0: ffff80008ee498f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #0: ffff80008ee498f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3ac/0x728 kernel/rcu/tree_exp.h:995 1 lock held by syz-executor.2/14222: #0: ffff80008ee498f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffff80008ee498f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x37c/0x728 kernel/rcu/tree_exp.h:995 1 lock held by syz-executor.0/19855: 2 locks held by syz-executor.0/20474: #0: ffff0000c86c1470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline] #0: ffff0000c86c1470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig fs/fsopen.c:349 [inline] #0: ffff0000c86c1470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __arm64_sys_fsconfig+0x74c/0xc40 fs/fsopen.c:349 #1: ffff0000d2d700e0 (&type->s_umount_key#74){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #1: ffff0000d2d700e0 (&type->s_umount_key#74){+.+.}-{3:3}, at: super_lock+0x208/0x33c fs/super.c:120 2 locks held by syz-executor.0/21061: #0: ffff0000d2029870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:474 [inline] #0: ffff0000d2029870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig fs/fsopen.c:349 [inline] #0: ffff0000d2029870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __arm64_sys_fsconfig+0x74c/0xc40 fs/fsopen.c:349 #1: ffff0000d2d700e0 (&type->s_umount_key#74){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #1: ffff0000d2d700e0 (&type->s_umount_key#74){+.+.}-{3:3}, at: super_lock+0x208/0x33c fs/super.c:120 2 locks held by syz-executor.3/23885: =============================================