INFO: task syz-executor.1:8513 blocked for more than 430 seconds. Not tainted 5.12.0-rc6-syzkaller-00183-g79c338ab575e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid: 8513 ppid: 3206 flags:0x00000004 Call Trace: [] context_switch kernel/sched/core.c:4322 [inline] [] __schedule+0x47c/0xe8c kernel/sched/core.c:5073 [] schedule+0x64/0x166 kernel/sched/core.c:5152 [] schedule_preempt_disabled+0x16/0x28 kernel/sched/core.c:5211 [] __mutex_lock_common kernel/locking/mutex.c:1026 [inline] [] __mutex_lock+0x4a8/0x99e kernel/locking/mutex.c:1096 [] mutex_lock_nested+0x14/0x1c kernel/locking/mutex.c:1111 [] perf_event_exit_task_context kernel/events/core.c:12475 [inline] [] perf_event_exit_task+0x1be/0x708 kernel/events/core.c:12541 [] do_exit+0x77a/0x1846 kernel/exit.c:834 [] do_group_exit+0xa0/0x198 kernel/exit.c:922 [] get_signal+0x31e/0x14ba kernel/signal.c:2781 [] do_signal arch/riscv/kernel/signal.c:271 [inline] [] do_notify_resume+0xa8/0x930 arch/riscv/kernel/signal.c:317 [] ret_from_exception+0x0/0x14 Showing all locks held in the system: 1 lock held by khungtaskd/898: #0: ffffffe00432b268 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x32/0x1fa kernel/locking/lockdep.c:6329 1 lock held by klogd/2853: 2 locks held by getty/3022: #0: ffffffe00cce4098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x48 drivers/tty/tty_ldsem.c:340 #1: ffffffd010a8b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9ac/0xb08 drivers/tty/n_tty.c:2178 3 locks held by kworker/0:1/5890: 1 lock held by syz-executor.1/8512: 1 lock held by syz-executor.1/8513: #0: ffffffe01e0f88b0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_exit_task_context kernel/events/core.c:12475 [inline] #0: ffffffe01e0f88b0 (&ctx->mutex){+.+.}-{3:3}, at: perf_event_exit_task+0x1be/0x708 kernel/events/core.c:12541 =============================================