INFO: task syz-executor.4:7958 blocked for more than 143 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28656 pid: 7958 ppid: 7330 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f5d479168d9 RSP: 002b:00007f5d4708d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5d47a1af60 RCX: 00007f5d479168d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007f5d47970cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb39e59ef R14: 00007f5d4708d300 R15: 0000000000022000 INFO: task syz-executor.3:7959 blocked for more than 143 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28656 pid: 7959 ppid: 7277 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f390b64f8d9 RSP: 002b:00007f390adc6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f390b753f60 RCX: 00007f390b64f8d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007f390b6a9cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1290d05f R14: 00007f390adc6300 R15: 0000000000022000 INFO: task syz-executor.0:7966 blocked for more than 143 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28656 pid: 7966 ppid: 7245 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f405cebc8d9 RSP: 002b:00007f405c633188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f405cfc0f60 RCX: 00007f405cebc8d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007f405cf16cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3c5b07af R14: 00007f405c633300 R15: 0000000000022000 INFO: task syz-executor.5:7976 blocked for more than 144 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28656 pid: 7976 ppid: 7244 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f82ae4588d9 RSP: 002b:00007f82adbcf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f82ae55cf60 RCX: 00007f82ae4588d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000004 RBP: 00007f82ae4b2cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffed98497f R14: 00007f82adbcf300 R15: 0000000000022000 INFO: task syz-executor.5:8028 blocked for more than 144 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29264 pid: 8028 ppid: 7244 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f82ae4588d9 RSP: 002b:00007f82adbae188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f82ae55d020 RCX: 00007f82ae4588d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000004 RBP: 00007f82ae4b2cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffed98497f R14: 00007f82adbae300 R15: 0000000000022000 INFO: task syz-executor.4:7975 blocked for more than 144 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28656 pid: 7975 ppid: 7330 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f5d479168d9 RSP: 002b:00007f5d4708d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5d47a1af60 RCX: 00007f5d479168d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007f5d47970cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb39e59ef R14: 00007f5d4708d300 R15: 0000000000022000 INFO: task syz-executor.0:7986 blocked for more than 144 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29264 pid: 7986 ppid: 7245 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f405cebc8d9 RSP: 002b:00007f405c633188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f405cfc0f60 RCX: 00007f405cebc8d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007f405cf16cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3c5b07af R14: 00007f405c633300 R15: 0000000000022000 INFO: task syz-executor.4:7987 blocked for more than 145 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28656 pid: 7987 ppid: 7330 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f5d479168d9 RSP: 002b:00007f5d4708d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5d47a1af60 RCX: 00007f5d479168d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007f5d47970cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb39e59ef R14: 00007f5d4708d300 R15: 0000000000022000 INFO: task syz-executor.3:7996 blocked for more than 145 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28656 pid: 7996 ppid: 7277 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f390b64f8d9 RSP: 002b:00007f390adc6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f390b753f60 RCX: 00007f390b64f8d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007f390b6a9cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1290d05f R14: 00007f390adc6300 R15: 0000000000022000 INFO: task syz-executor.2:7998 blocked for more than 145 seconds. Not tainted 5.16.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28208 pid: 7998 ppid: 7429 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4986 [inline] __schedule+0x90d/0x2680 kernel/sched/core.c:6296 schedule+0xd2/0x260 kernel/sched/core.c:6369 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428 __mutex_lock_common kernel/locking/mutex.c:673 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a7/0x2120 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x1290 drivers/tty/tty_io.c:2778 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7fb99209d8d9 RSP: 002b:00007fb991814188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb9921a1f60 RCX: 00007fb99209d8d9 RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000005 RBP: 00007fb9920f7cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffccb649b0f R14: 00007fb991814300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8ad772a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 2 locks held by getty/3312: #0: ffff88807f2b3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc9000275b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9dd/0xed0 drivers/tty/n_tty.c:2077 2 locks held by syz-executor.4/7949: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.4/7958: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.3/7959: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.0/7966: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.5/7976: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.5/8028: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.4/7975: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.0/7986: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.4/7987: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.3/7996: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.2/7998: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.0/8011: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.2/8019: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.2/8027: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 2 locks held by syz-executor.1/8015: #0: ffff8880229a0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffff88801047f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0x88c/0xbf0 kernel/hung_task.c:295 kthread+0x299/0x340 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x15e/0x1c0 drivers/acpi/processor_idle.c:551