INFO: task syz-executor.4:16316 blocked for more than 143 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29648 pid:16316 ppid: 14478 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 set_selection_kernel drivers/tty/vt/selection.c:357 [inline] set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f4f668be188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffeea9e91cf R14: 00007f4f668be300 R15: 0000000000022000 INFO: task syz-executor.1:16283 blocked for more than 143 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28104 pid:16283 ppid: 14476 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 set_selection_kernel drivers/tty/vt/selection.c:357 [inline] set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f9ac2f1c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe9f81699f R14: 00007f9ac2f1c300 R15: 0000000000022000 INFO: task syz-executor.1:16302 blocked for more than 143 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28408 pid:16302 ppid: 14476 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f9ac2efb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffe9f81699f R14: 00007f9ac2efb300 R15: 0000000000022000 INFO: task syz-executor.1:16318 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29648 pid:16318 ppid: 14476 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 set_selection_kernel drivers/tty/vt/selection.c:357 [inline] set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f9ac2eda188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffe9f81699f R14: 00007f9ac2eda300 R15: 0000000000022000 INFO: task syz-executor.2:16299 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28104 pid:16299 ppid: 14477 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 set_selection_kernel drivers/tty/vt/selection.c:357 [inline] set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f33a32be188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcf4ec9e3f R14: 00007f33a32be300 R15: 0000000000022000 INFO: task syz-executor.2:16306 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28408 pid:16306 ppid: 14477 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f33a329d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffcf4ec9e3f R14: 00007f33a329d300 R15: 0000000000022000 INFO: task syz-executor.2:16322 blocked for more than 144 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:29648 pid:16322 ppid: 14477 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 set_selection_kernel drivers/tty/vt/selection.c:357 [inline] set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f33a327c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffcf4ec9e3f R14: 00007f33a327c300 R15: 0000000000022000 INFO: task syz-executor.5:16286 blocked for more than 145 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28408 pid:16286 ppid: 14479 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 paste_selection+0x13f/0x450 drivers/tty/vt/selection.c:393 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f0b6484a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000006 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffca2910a6f R14: 00007f0b6484a300 R15: 0000000000022000 INFO: task syz-executor.1:16289 blocked for more than 145 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28552 pid:16289 ppid: 16283 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 paste_selection+0x13f/0x450 drivers/tty/vt/selection.c:393 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f9ac2f1c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe9f81699f R14: 00007f9ac2f1c300 R15: 0000000000022000 INFO: task syz-executor.2:16300 blocked for more than 145 seconds. Not tainted 5.15.0-rc4-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28552 pid:16300 ppid: 16299 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 paste_selection+0x13f/0x450 drivers/tty/vt/selection.c:393 vt_ioctl+0x19a9/0x2130 drivers/tty/vt/vt_ioctl.c:762 tty_ioctl+0x478/0x12d0 drivers/tty/tty_io.c:2805 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: 0033:0x4665e9 RSP: 002b:00007f33a32be188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000000 RSI: 000000000000541c RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcf4ec9e3f R14: 00007f33a32be300 R15: 0000000000022000 Showing all locks held in the system: 5 locks held by kworker/u4:1/10: 1 lock held by khungtaskd/27: #0: ffffffff8ab767c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 3 locks held by kworker/u4:5/1381: #0: ffff8880b9f319d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:474 [inline] #0: ffff8880b9f319d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1317 [inline] #0: ffff8880b9f319d8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1620 [inline] #0: ffff8880b9f319d8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26c0 kernel/sched/core.c:6201 #1: ffff8880b9f1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39d/0x480 kernel/sched/psi.c:880 #2: ffff8880b9f20258 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x49/0x1a0 kernel/time/timer.c:946 1 lock held by in:imklog/6234: #0: ffff88801bd16370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:990 1 lock held by syz-executor.4/16316: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 1 lock held by syz-executor.1/16283: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 2 locks held by syz-executor.1/16302: #0: ffff888054759098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff888079d6f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 1 lock held by syz-executor.1/16318: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 3 locks held by syz-executor.0/16279: 1 lock held by syz-executor.2/16299: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 2 locks held by syz-executor.2/16306: #0: ffff88807d2ac098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff88807636d0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 1 lock held by syz-executor.2/16322: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 3 locks held by syz-executor.5/16286: #0: ffff888012bc5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff88801c8d00b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 #2: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: paste_selection+0x13f/0x450 drivers/tty/vt/selection.c:393 3 locks held by syz-executor.1/16289: #0: ffff888054759098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff888079d6f0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 #2: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: paste_selection+0x13f/0x450 drivers/tty/vt/selection.c:393 3 locks held by syz-executor.2/16300: #0: ffff88807d2ac098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff88807636d0b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 #2: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: paste_selection+0x13f/0x450 drivers/tty/vt/selection.c:393 1 lock held by syz-executor.5/16333: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 2 locks held by syz-executor.5/16340: #0: ffff888012bc5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff88801c8d00b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 1 lock held by syz-executor.3/16746: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 2 locks held by syz-executor.3/16750: #0: ffff888018b7f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff8880791640b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 1 lock held by syz-executor.3/16752: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 3 locks held by syz-executor.3/16747: #0: ffff888018b7f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffff8880791640b8 (&buf->lock){+.+.}-{3:3}, at: paste_selection+0x109/0x450 drivers/tty/vt/selection.c:390 #2: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: paste_selection+0x13f/0x450 drivers/tty/vt/selection.c:393 1 lock held by syz-executor859/16786: #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_kernel drivers/tty/vt/selection.c:357 [inline] #0: ffffffff8b53f908 (vc_sel.lock){+.+.}-{3:3}, at: set_selection_user+0x81/0x180 drivers/tty/vt/selection.c:185 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc4-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:105 nmi_trigger_cpumask_backtrace+0x11a/0x160 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+0x38b/0x460 kernel/kthread.c:319 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 CPU: 1 PID: 149 Comm: kworker/u4:2 Not tainted 5.15.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:lock_release+0x12/0x720 kernel/locking/lockdep.c:5633 Code: c7 c7 48 0a 7e 8c e8 ed 8c 54 00 e9 6d fd ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 54 <49> 89 fc 55 53 48 81 ec 90 00 00 00 48 8d 6c 24 10 48 89 74 24 08 RSP: 0018:ffffc9000169fc60 EFLAGS: 00000293 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8158b1d4 RDX: 0000000000000000 RSI: ffffffff88080280 RDI: ffffffff8ab767c0 RBP: ffff88800fc69800 R08: 0000000000000000 R09: ffff8880b9f3298b R10: ffffed10173e6531 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff888059248c80 R14: ffff8880592496d8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f27a59d2018 CR3: 00000000113be000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:272 [inline] rcu_read_unlock include/linux/rcupdate.h:720 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:414 [inline] batadv_nc_worker+0x668/0xd70 net/batman-adv/network-coding.c:721 process_one_work+0x87f/0x1450 kernel/workqueue.c:2297 worker_thread+0x598/0x1040 kernel/workqueue.c:2444 kthread+0x38b/0x460 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: c7 c7 48 0a 7e 8c mov $0x8c7e0a48,%edi 6: e8 ed 8c 54 00 callq 0x548cf8 b: e9 6d fd ff ff jmpq 0xfffffd7d 10: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 17: 00 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 41 57 push %r15 24: 41 56 push %r14 26: 41 55 push %r13 28: 41 54 push %r12 * 2a: 49 89 fc mov %rdi,%r12 <-- trapping instruction 2d: 55 push %rbp 2e: 53 push %rbx 2f: 48 81 ec 90 00 00 00 sub $0x90,%rsp 36: 48 8d 6c 24 10 lea 0x10(%rsp),%rbp 3b: 48 89 74 24 08 mov %rsi,0x8(%rsp)