INFO: task syz-executor.0:4081 blocked for more than 143 seconds. Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29600 pid: 4081 ppid: 4080 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __do_sys_io_destroy fs/aio.c:1429 [inline] __se_sys_io_destroy fs/aio.c:1407 [inline] __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1407 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4665d9 RSP: 002b:00007f235c8bc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f235c89b000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe478fd19f R14: 00007f235c8bc300 R15: 0000000000022000 INFO: task syz-executor.0:4085 blocked for more than 143 seconds. Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29384 pid: 4085 ppid: 4084 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __do_sys_io_destroy fs/aio.c:1429 [inline] __se_sys_io_destroy fs/aio.c:1407 [inline] __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1407 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4665d9 RSP: 002b:00007f235c8bc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f235c89b000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe478fd19f R14: 00007f235c8bc300 R15: 0000000000022000 INFO: task syz-executor.0:4089 blocked for more than 143 seconds. Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29744 pid: 4089 ppid: 4088 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __do_sys_io_destroy fs/aio.c:1429 [inline] __se_sys_io_destroy fs/aio.c:1407 [inline] __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1407 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4665d9 RSP: 002b:00007f235c8bc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f235c89b000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe478fd19f R14: 00007f235c8bc300 R15: 0000000000022000 INFO: task syz-executor.0:4097 blocked for more than 144 seconds. Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29600 pid: 4097 ppid: 4096 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __do_sys_io_destroy fs/aio.c:1429 [inline] __se_sys_io_destroy fs/aio.c:1407 [inline] __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1407 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4665d9 RSP: 002b:00007f235c8bc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f235c89b000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe478fd19f R14: 00007f235c8bc300 R15: 0000000000022000 INFO: task syz-executor.0:4101 blocked for more than 144 seconds. Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29600 pid: 4101 ppid: 4100 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __do_sys_io_destroy fs/aio.c:1429 [inline] __se_sys_io_destroy fs/aio.c:1407 [inline] __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1407 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4665d9 RSP: 002b:00007f235c8bc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f235c89b000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe478fd19f R14: 00007f235c8bc300 R15: 0000000000022000 INFO: task syz-executor.0:4105 blocked for more than 144 seconds. Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29600 pid: 4105 ppid: 4104 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __do_sys_io_destroy fs/aio.c:1429 [inline] __se_sys_io_destroy fs/aio.c:1407 [inline] __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1407 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4665d9 RSP: 002b:00007f235c8bc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f235c89b000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe478fd19f R14: 00007f235c8bc300 R15: 0000000000022000 INFO: task syz-executor.0:4114 blocked for more than 144 seconds. Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29600 pid: 4114 ppid: 4113 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0xadf/0x52b0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1be/0x530 kernel/sched/completion.c:106 __do_sys_io_destroy fs/aio.c:1429 [inline] __se_sys_io_destroy fs/aio.c:1407 [inline] __x64_sys_io_destroy+0x17e/0x1e0 fs/aio.c:1407 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4665d9 RSP: 002b:00007f235c8bc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f235c89b000 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe478fd19f R14: 00007f235c8bc300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8bf888b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/14: #0: ffffffff8bf885b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/29: #0: ffffffff8bf89400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492 2 locks held by getty/3284: #0: ffff888025c0e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc18/0xf50 kernel/hung_task.c:369 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4060 Comm: syz-executor.0 Not tainted 6.0.0-rc6-syzkaller-00210-gbf682942cd26 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 RIP: 0010:write_comp_data+0x15/0x90 kernel/kcov.c:223 Code: 8b 80 b0 15 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 65 8b 05 d9 6a 86 7e 49 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 <49> 89 f8 65 48 8b 14 25 80 6f 02 00 a9 00 01 ff 00 74 0e 85 f6 74 RSP: 0018:ffffc9000494fb58 EFLAGS: 00000246 RAX: 0000000080000001 RBX: 0000000000000000 RCX: ffffffff81485a7c RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffffc9000494fd1c R08: 0000000000000005 R09: 0000000000000000 R10: 0000000040000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000040000005 R14: 0000000040000000 R15: ffff888074368000 FS: 0000000003350400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe478fab70 CR3: 000000006cb2b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: eligible_child kernel/exit.c:977 [inline] wait_consider_task+0x2ac/0x3bf0 kernel/exit.c:1298 do_wait_thread kernel/exit.c:1401 [inline] do_wait+0x791/0xce0 kernel/exit.c:1518 kernel_wait4+0x14c/0x260 kernel/exit.c:1681 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1709 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x464a77 Code: 89 7c 24 10 48 89 4c 24 18 e8 35 45 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 45 02 00 8b 44 RSP: 002b:00007ffe478fd3c0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000003a39 RCX: 0000000000464a77 RDX: 0000000040000001 RSI: 00007ffe478fd45c RDI: 00000000ffffffff RBP: 00007ffe478fd45c R08: 0000000000000000 R09: 00007ffe4794d080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 00000000000393de R14: 0000000000000005 R15: 00007ffe478fd4c0