kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
watchdog: BUG: soft lockup - CPU#0 stuck for 111s! [syz.4.1687:5730]
Modules linked in:
CPU: 0 PID: 5730 Comm: syz.4.1687 Not tainted 5.10.218-syzkaller-00638-g3feee789f446 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x278/0x510 kernel/smp.c:517
Code: 0f 85 18 02 00 00 44 8b 6c 24 48 44 89 ee 83 e6 01 31 ff e8 7a f0 0a 00 41 83 e5 01 75 0a e8 bf ec 0a 00 e9 eb 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 15 f7 44 24 48 01 00 00 00 0f 84 cd 00 00
RSP: 0018:ffffc90000c17b60 EFLAGS: 00000293
RAX: ffffffff815fbde4 RBX: 1ffff92000182f75 RCX: ffff88810d56bb40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000c17c50 R08: ffffffff815fbdb6 R09: ffffed103ee2aec9
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90000c17ba8 R15: 0000000000000000
FS:  0000555556191500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7b28d556b8 CR3: 0000000120c78000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 rcu_barrier+0x218/0x400 kernel/rcu/tree.c:3929
 netdev_run_todo+0x157/0xdc0 net/core/dev.c:10294
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 tun_detach drivers/net/tun.c:716 [inline]
 tun_chr_close+0xc4/0x140 drivers/net/tun.c:3483
 __fput+0x309/0x760 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:165
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274
 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f0893b13bd9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffb97336c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000004b652 RCX: 00007f0893b13bd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: ffffffffffffffff R08: 0000000000000001 R09: 0000000bb97339ef
R10: 00007f089399e000 R11: 0000000000000246 R12: 00007f0893ca1f6c
R13: 0000000000000032 R14: 00007f0893ca3a60 R15: 00007f0893ca1f60
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5733 Comm: syz.1.1688 Not tainted 5.10.218-syzkaller-00638-g3feee789f446 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:66 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:112 [inline]
RIP: 0010:kvm_wait+0xec/0x150 arch/x86/kernel/kvm.c:921
Code: 03 42 0f b6 04 20 84 c0 75 6a 41 0f b6 45 00 44 38 f0 75 26 41 f7 c7 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 95 52 d5 03 f4 <eb> 0e 0f 1f 44 00 00 0f 00 2d 86 52 d5 03 fb f4 4c 89 7c 24 18 ff
RSP: 0000:ffffc90001766ec0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: 1ffff920002ecddc RCX: ffffffff8150b5a4
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffc90001766f00
RBP: ffffc90001766f70 R08: dffffc0000000000 R09: ffffed1021f52461
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88810fa92300 R14: 0000000000000003 R15: 0000000000000046
FS:  00007f21e85026c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffdfa50000 CR3: 000000010e57a000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x72f/0xc70 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock_flags include/linux/spinlock.h:195 [inline]
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irqsave+0x1a0/0x210 kernel/locking/spinlock.c:159
 force_sig_info_to_task+0x67/0x320 kernel/signal.c:1320
 force_sig_fault_to_task kernel/signal.c:1684 [inline]
 force_sig_fault+0x125/0x1c0 kernel/signal.c:1691
 no_context+0x2e1/0xf20 arch/x86/mm/fault.c:672
 __bad_area_nosemaphore+0xcd/0x440 arch/x86/mm/fault.c:839
 bad_area_nosemaphore+0x2d/0x40 arch/x86/mm/fault.c:846
 do_kern_addr_fault+0x69/0x80 arch/x86/mm/fault.c:1211
 handle_page_fault arch/x86/mm/fault.c:1451 [inline]
 exc_page_fault+0x399/0x5b0 arch/x86/mm/fault.c:1509
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
RIP: 0010:strncpy_from_kernel_nofault+0x1c2/0x1e0 mm/maccess.c:84
Code: c1 7c 9c 48 8b 7d c8 e8 9c 9c 17 00 48 8b 75 c8 48 8b 55 d0 eb 89 89 f9 80 e1 07 38 c1 7c 96 e8 e4 9c 17 00 48 8b 55 d0 eb 8b <e8> e9 08 da ff 48 c7 c3 f2 ff ff ff e9 45 ff ff ff 66 2e 0f 1f 84
RSP: 0000:ffffc90001767608 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffffdfa50000 RCX: ffff88810f28a780
RDX: ffffc900017676a8 RSI: ffffffffdfa50000 RDI: ffffffffdfa50000
RBP: ffffc90001767650 R08: ffffffff81331f42 R09: ffffed1021e514f1
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffffffdfa50000 R14: dffffc0000000000 R15: 0000000000000008
 bpf_probe_read_kernel_str_common kernel/trace/bpf_trace.c:252 [inline]
 ____bpf_probe_read_compat_str kernel/trace/bpf_trace.c:300 [inline]
 bpf_probe_read_compat_str+0x112/0x180 kernel/trace/bpf_trace.c:293
 bpf_prog_3b9dd6b9ec8089c9+0x3f/0x3b0
 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2061 [inline]
 bpf_trace_run5+0x176/0x320 kernel/trace/bpf_trace.c:2101
 __bpf_trace_signal_generate+0x3c/0x50 include/trace/events/signal.h:50
 __traceiter_signal_generate+0x8e/0xe0 include/trace/events/signal.h:50
 trace_signal_generate include/trace/events/signal.h:50 [inline]
 __send_signal+0xb39/0xb90 kernel/signal.c:1186
 send_signal+0x4c1/0x5e0 kernel/signal.c:1245
 force_sig_info_to_task+0x272/0x320 kernel/signal.c:1337
 force_sig_fault_to_task kernel/signal.c:1684 [inline]
 force_sig_fault+0x125/0x1c0 kernel/signal.c:1691
 no_context+0x2e1/0xf20 arch/x86/mm/fault.c:672
 __bad_area_nosemaphore+0xcd/0x440 arch/x86/mm/fault.c:839
 __bad_area arch/x86/mm/fault.c:860 [inline]
 bad_area+0x69/0x80 arch/x86/mm/fault.c:866
 handle_page_fault arch/x86/mm/fault.c:1453 [inline]
 exc_page_fault+0x439/0x5b0 arch/x86/mm/fault.c:1509
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
RIP: 0010:__put_user_nocheck_8+0x11/0x21
Code: 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f 00 00 48 39 d9 73 14 0f 01 cb 48 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 <0f> 01 ca b9 f2 ff ff ff c3 cc cc cc cc cc cc cc 55 48 89 e5 41 57
RSP: 0000:ffffc90001767d98 EFLAGS: 00050283
RAX: 000000007735948d RBX: 00007fffffffeff9 RCX: 0000000000000019
RDX: ffffc9000132a000 RSI: 0000000000000113 RDI: 0000000000000114
RBP: ffffc90001767e48 R08: ffffffff815b60b4 R09: ffffc90001767de0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90001767de0
R13: dffffc0000000000 R14: 1ffff920002ecfb8 R15: 0000000000000019
 emulate_vsyscall+0xe33/0x13d0 arch/x86/entry/vsyscall/vsyscall_64.c:246
 do_user_addr_fault arch/x86/mm/fault.c:1300 [inline]
 handle_page_fault arch/x86/mm/fault.c:1453 [inline]
 exc_page_fault+0x147/0x5b0 arch/x86/mm/fault.c:1509
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571
RIP: 0033:_end+0x783da000/0x0
Code: Unable to access opcode bytes at RIP 0xffffffffff5fffd6.
RSP: 002b:00007f21e8501ab8 EFLAGS: 00010246
RAX: ffffffffffffffda RBX: 00007f21e940ef60 RCX: 00007f21e9280bd9
RDX: 00007f21e8501ac0 RSI: 00007f21e8501bf0 RDI: 0000000000000019
RBP: 00007f21e92efe60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f21e940ef60 R15: 00007ffd277b63a8