INFO: task syz-executor.4:7548 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29256 pid:7548 tgid:7548 ppid:6765 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9207679669
RSP: 002b:00007f920888f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f920778bf60 RCX: 00007f9207679669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007f92076d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f920778bf60 R15: 00007ffdc463ad18
INFO: task syz-executor.0:7556 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29352 pid:7556 tgid:7556 ppid:6767 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbaefe79669
RSP: 002b:00007fbaf10260c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbaeff8c030 RCX: 00007fbaefe79669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007fbaefed4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fbaeff8c030 R15: 00007ffd1789ee98
INFO: task syz-executor.5:7567 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29480 pid:7567 tgid:7567 ppid:6769 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff49e279669
RSP: 002b:00007ff49f31b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff49e38c030 RCX: 00007ff49e279669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007ff49e2d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff49e38c030 R15: 00007ffc5b63abf8
INFO: task syz-executor.1:7584 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29480 pid:7584 tgid:7584 ppid:6766 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fab06479669
RSP: 002b:00007fab075aa0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fab0658c030 RCX: 00007fab06479669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007fab064d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fab0658c030 R15: 00007ffc16051f58
INFO: task syz-executor.2:7586 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29480 pid:7586 tgid:7586 ppid:6759 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efe34679669
RSP: 002b:00007efe357890c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efe3478c030 RCX: 00007efe34679669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007efe346d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efe3478c030 R15: 00007ffed572d6a8
INFO: task syz-executor.4:7589 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28616 pid:7589 tgid:7589 ppid:6765 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9207679669
RSP: 002b:00007f920886e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f920778c030 RCX: 00007f9207679669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007f92076d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f920778c030 R15: 00007ffdc463ad18
INFO: task syz-executor.3:7590 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:29480 pid:7590 tgid:7590 ppid:6768 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3a34879669
RSP: 002b:00007f3a359630c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3a3498c030 RCX: 00007f3a34879669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007f3a348d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f3a3498c030 R15: 00007fff0ce5e2a8
INFO: task syz-executor.0:7593 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28616 pid:7593 tgid:7593 ppid:6767 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbaefe79669
RSP: 002b:00007fbaf10260c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbaeff8c030 RCX: 00007fbaefe79669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007fbaefed4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fbaeff8c030 R15: 00007ffd1789ee98
INFO: task syz-executor.5:7601 blocked for more than 145 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:29480 pid:7601 tgid:7601 ppid:6769 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff49e279669
RSP: 002b:00007ff49f33c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff49e38bf60 RCX: 00007ff49e279669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007ff49e2d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff49e38bf60 R15: 00007ffc5b63abf8
INFO: task syz-executor.1:7614 blocked for more than 146 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:28296 pid:7614 tgid:7611 ppid:6766 task_flags:0x400140 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
vt_ioctl+0x81a/0x1f20 drivers/tty/vt/vt_ioctl.c:753
tty_ioctl+0x929/0xde0 drivers/tty/tty_io.c:2792
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fab06479669
RSP: 002b:00007fab075cb0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fab0658bf60 RCX: 00007fab06479669
RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000003
RBP: 00007fab064d4fd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fab0658bf60 R15: 00007ffc16051f58
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5581:
#0: ffff88802f81c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
2 locks held by syz-executor.3/7544:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.4/7548:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.0/7556:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.5/7567:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.1/7584:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.2/7586:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.4/7589:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.3/7590:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.0/7593:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.5/7601:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.1/7614:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.2/7616:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.0/7621:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.3/7623:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.4/7626:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.5/7636:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.2/7647:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.0/7650:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.3/7653:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.4/7657:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.5/7665:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
2 locks held by syz-executor.2/7673:
#0: ffff88806e0a00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffff88801a0790b8 (&buf->lock){+.+.}-{4:4}, at: paste_selection+0x14b/0x6f0 drivers/tty/vt/selection.c:411
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xf60/0xfa0 kernel/hung_task.c:495
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 5e 33 ca f5 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 21 22 00 f3 0f 1e fa fb f4 33 33 ca f5 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 073d4265c8d9a800 RBX: ffffffff81967b97 RCX: 073d4265c8d9a800
RDX: 0000000000000001 RSI: ffffffff8d70bf39 RDI: ffffffff8bbf0460
RBP: ffffc90000197f10 R08: ffff8880b8932fdb R09: 1ffff110171265fb
R10: dffffc0000000000 R11: ffffed10171265fc R12: ffffffff8f7cd270
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003955b58
FS: 0000000000000000(0000) GS:ffff88812623e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f28189a0200 CR3: 000000000dd38000 CR4: 0000000000350ef0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x1e7/0x510 kernel/sched/idle.c:330
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147