INFO: task syz-executor.0:5488 blocked for more than 143 seconds. Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28288 pid:5488 tgid:5488 ppid:5487 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xedb/0x5af0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe9/0x270 kernel/sched/core.c:6778 schedule_timeout+0x257/0x290 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116 __do_sys_io_destroy fs/aio.c:1422 [inline] __se_sys_io_destroy fs/aio.c:1400 [inline] __x64_sys_io_destroy+0x183/0x1d0 fs/aio.c:1400 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x456e69 RSP: 002b:00007f0df86cc0d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000055bf80 RCX: 0000000000456e69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f0df86ab000 RBP: 00000000004b0ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004b0297 R13: 000000000000000b R14: 000000000055bf80 R15: 00007ffcbd2d8a28 INFO: task syz-executor.0:5492 blocked for more than 143 seconds. Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28288 pid:5492 tgid:5492 ppid:5491 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xedb/0x5af0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe9/0x270 kernel/sched/core.c:6778 schedule_timeout+0x257/0x290 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116 __do_sys_io_destroy fs/aio.c:1422 [inline] __se_sys_io_destroy fs/aio.c:1400 [inline] __x64_sys_io_destroy+0x183/0x1d0 fs/aio.c:1400 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x456e69 RSP: 002b:00007f0df86cc0d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000055bf80 RCX: 0000000000456e69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f0df86ab000 RBP: 00000000004b0ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004b0297 R13: 000000000000000b R14: 000000000055bf80 R15: 00007ffcbd2d8a28 INFO: task syz-executor.0:5511 blocked for more than 143 seconds. Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28288 pid:5511 tgid:5511 ppid:5510 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xedb/0x5af0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe9/0x270 kernel/sched/core.c:6778 schedule_timeout+0x257/0x290 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common+0x3e0/0x5f0 kernel/sched/completion.c:116 __do_sys_io_destroy fs/aio.c:1422 [inline] __se_sys_io_destroy fs/aio.c:1400 [inline] __x64_sys_io_destroy+0x183/0x1d0 fs/aio.c:1400 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x456e69 RSP: 002b:00007f0df86cc0d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000055bf80 RCX: 0000000000456e69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f0df86ab000 RBP: 00000000004b0ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004b0297 R13: 000000000000000b R14: 000000000055bf80 R15: 00007ffcbd2d8a28 Showing all locks held in the system: 1 lock held by ksoftirqd/1/22: #0: ffff8880b993c718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 1 lock held by khungtaskd/29: #0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #0: ffffffff8cfabce0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613 2 locks held by getty/4827: #0: ffff888025db60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 744 Comm: kworker/u4:5 Not tainted 6.7.0-rc1-syzkaller-00012-g9bacdd8996c7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:task_css_set include/linux/cgroup.h:421 [inline] RIP: 0010:task_dfl_cgroup include/linux/cgroup.h:490 [inline] RIP: 0010:task_psi_group kernel/sched/psi.c:877 [inline] RIP: 0010:psi_task_change+0xcb/0x2e0 kernel/sched/psi.c:910 Code: 00 48 8d bb 28 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 fa 01 00 00 4c 8b bb 28 13 00 00 30 50 19 09 85 c0 0f 85 f9 00 00 00 49 8d bf 88 00 00 00 48 b8 RSP: 0018:ffffc90003937b68 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8880152ebb80 RCX: ffffffff81301bde RDX: 1ffff11002a5d9d5 RSI: ffffffff81301be8 RDI: ffff8880152ecea8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000001 R14: 0000003c5b96cb17 R15: ffffffff8cff3800 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0df8ecd988 CR3: 000000000cd77000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: psi_enqueue kernel/sched/stats.h:139 [inline] enqueue_task kernel/sched/core.c:2091 [inline] activate_task kernel/sched/core.c:2125 [inline] ttwu_do_activate+0x9f4/0xcf0 kernel/sched/core.c:3770 ttwu_queue kernel/sched/core.c:4021 [inline] try_to_wake_up+0x578/0x13d0 kernel/sched/core.c:4342 kick_pool+0x253/0x470 kernel/workqueue.c:1142 process_one_work+0x686/0x15d0 kernel/workqueue.c:2592 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242