RBP: 00007f8501613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f85017e6038 R14: 00007f85017e5fa0 R15: 00007ffd0736dec8 watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz.2.40:471] Modules linked in: CPU: 1 PID: 471 Comm: syz.2.40 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0xf2/0x140 arch/x86/kernel/kvm.c:1064 Code: 96 13 04 f4 eb 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 40 38 f0 75 10 66 90 0f 00 2d 70 96 13 04 fb f4 71 ff ff ff fb e9 6b ff ff ff e8 de 16 b9 03 89 f9 80 e1 07 38 RSP: 0018:ffffc9000df9f040 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffffea00049d97a8 RCX: ffffffff84f48de2 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffea00049d97a8 RBP: ffffc9000df9f0d0 R08: dffffc0000000000 R09: fffff9400093b2f6 R10: fffff9400093b2f6 R11: 1ffffd400093b2f5 R12: 1ffff1103ee20001 R13: ffff8881f7138cd4 R14: dffffc0000000000 R15: 1ffff92001bf3e08 FS: 00007f850239c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffffa CR3: 000000010fc61000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0xd8/0xe0 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] do_anonymous_page mm/memory.c:4263 [inline] handle_pte_fault mm/memory.c:5169 [inline] __handle_mm_fault mm/memory.c:5313 [inline] handle_mm_fault+0x1b91/0x2640 mm/memory.c:5453 do_user_addr_fault+0x63b/0x1050 arch/x86/mm/fault.c:1374 handle_page_fault arch/x86/mm/fault.c:1466 [inline] exc_page_fault+0x51/0xb0 arch/x86/mm/fault.c:1522 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608 RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166 Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000df9f620 EFLAGS: 00050206 RAX: ffffffff8261e201 RBX: 0000000000001000 RCX: 0000000000000fd4 RDX: 0000000000001000 RSI: 000020000064f000 RDI: ffff888117d3a02c RBP: ffffc9000df9f650 R08: dffffc0000000000 R09: ffffed1022fa7600 R10: 0000000000000000 R11: 0000000000000200 R12: 00007fffffffe000 R13: 000000000064ed00 R14: 000020000064efd4 R15: ffff888117d3a000 _copy_from_iter+0x3e2/0xfd0 lib/iov_iter.c:631 copy_page_from_iter+0x1d2/0x2b0 lib/iov_iter.c:752 skb_copy_datagram_from_iter+0x2cd/0x6b0 net/core/datagram.c:581 unix_stream_sendmsg+0x4c8/0xa70 net/unix/af_unix.c:2232 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x5a9/0x990 net/socket.c:2509 ___sys_sendmsg+0x21c/0x290 net/socket.c:2563 __sys_sendmsg net/socket.c:2592 [inline] __do_sys_sendmsg net/socket.c:2601 [inline] __se_sys_sendmsg net/socket.c:2599 [inline] __x64_sys_sendmsg+0x1f0/0x2c0 net/socket.c:2599 x64_sys_call+0x171/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f850158f749 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:00007f850239c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f85017e5fa0 RCX: 00007f850158f749 RDX: 0000000000000000 RSI: 0000200000001580 RDI: 0000000000000003 RBP: 00007f8501613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f85017e6038 R14: 00007f85017e5fa0 R15: 00007ffd0736dec8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 475 Comm: syz.2.40 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline] RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline] RIP: 0010:kvm_wait+0xcc/0x140 arch/x86/kernel/kvm.c:1058 Code: 20 f6 44 24 21 02 75 24 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 48 0f b6 07 40 38 f0 75 a6 66 90 0f 00 2d 95 96 13 04 f4 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 RSP: 0018:ffffc9000e53e300 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff8881161ab140 RCX: ffffffff84f48de2 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff8881161ab140 RBP: ffffc9000e53e390 R08: dffffc0000000000 R09: ffffed1022c35629 R10: ffffed1022c35629 R11: 1ffff11022c35628 R12: 1ffff1103ee00001 R13: ffff8881f7038cf4 R14: dffffc0000000000 R15: 1ffff92001ca7c60 FS: 00007f850237b6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000645000 CR3: 000000010fc61000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x108/0x110 kernel/locking/spinlock.c:162 __queue_map_get+0xe4/0x3d0 kernel/bpf/queue_stack_maps.c:109 queue_map_peek_elem+0x1f/0x30 kernel/bpf/queue_stack_maps.c:171 bpf_prog_00798911c748094f+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2283 [inline] bpf_trace_run2+0xff/0x250 kernel/trace/bpf_trace.c:2322 __bpf_trace_contention_end+0xb/0x10 include/trace/events/lock.h:122 trace_contention_end include/trace/events/lock.h:122 [inline] __pv_queued_spin_lock_slowpath+0xbff/0xc40 kernel/locking/qspinlock.c:560 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x108/0x110 kernel/locking/spinlock.c:162 __queue_map_get+0xe4/0x3d0 kernel/bpf/queue_stack_maps.c:109 queue_map_peek_elem+0x1f/0x30 kernel/bpf/queue_stack_maps.c:171 bpf_prog_00798911c748094f+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2283 [inline] bpf_trace_run2+0xff/0x250 kernel/trace/bpf_trace.c:2322 __bpf_trace_tlb_flush+0x25/0x30 include/trace/events/tlb.h:38 trace_tlb_flush include/trace/events/tlb.h:38 [inline] flush_tlb_func+0x4ca/0x4f0 arch/x86/mm/tlb.c:879 smp_call_function_many_cond+0x730/0x960 kernel/smp.c:989 on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1165 native_flush_tlb_multi+0x144/0x210 arch/x86/mm/tlb.c:-1 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline] flush_tlb_multi arch/x86/mm/tlb.c:970 [inline] flush_tlb_mm_range+0x36a/0x470 arch/x86/mm/tlb.c:1058 flush_tlb_page arch/x86/include/asm/tlbflush.h:241 [inline] ptep_clear_flush+0x111/0x150 mm/pgtable-generic.c:99 wp_page_copy+0xca3/0x15b0 mm/memory.c:3278 do_wp_page+0x9f2/0xfc0 mm/memory.c:-1 handle_pte_fault mm/memory.c:5189 [inline] __handle_mm_fault mm/memory.c:5313 [inline] handle_mm_fault+0x10e4/0x2640 mm/memory.c:5453 do_user_addr_fault+0x63b/0x1050 arch/x86/mm/fault.c:1374 handle_page_fault arch/x86/mm/fault.c:1466 [inline] exc_page_fault+0x51/0xb0 arch/x86/mm/fault.c:1522 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608 RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166 Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000e53f400 EFLAGS: 00050202 RAX: ffffffff8261bd01 RBX: 0000000000000e80 RCX: 0000000000000640 RDX: 0000000000000e80 RSI: ffff8881177d8840 RDI: 0000200000645000 RBP: ffffc9000e53f430 R08: dffffc0000000000 R09: ffffed1022efb1d0 R10: 0000000000000000 R11: 00000000000001d0 R12: 00007fffffffe180 R13: 0000000000000e00 R14: ffff8881177d8000 R15: 00002000006447c0 _copy_to_iter+0x3f0/0xe50 lib/iov_iter.c:527 copy_to_iter include/linux/uio.h:179 [inline] simple_copy_to_iter+0x50/0x70 net/core/datagram.c:521 __skb_datagram_iter+0xf1/0x730 net/core/datagram.c:419 skb_copy_datagram_iter+0x40/0x150 net/core/datagram.c:535 skb_copy_datagram_msg include/linux/skbuff.h:4004 [inline] unix_stream_read_actor+0x6f/0xc0 net/unix/af_unix.c:2973 unix_stream_read_generic+0xd0b/0x1fa0 net/unix/af_unix.c:2892 unix_stream_recvmsg+0x165/0x1b0 net/unix/af_unix.c:3010 ____sys_recvmsg+0x2a0/0x590 net/socket.c:-1 ___sys_recvmsg+0x1b2/0x510 net/socket.c:2770 __sys_recvmsg net/socket.c:2800 [inline] __do_sys_recvmsg net/socket.c:2810 [inline] __se_sys_recvmsg net/socket.c:2807 [inline] __x64_sys_recvmsg+0x1ed/0x2c0 net/socket.c:2807 x64_sys_call+0x75/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:48 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f850158f749 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:00007f850237b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007f85017e6090 RCX: 00007f850158f749 RDX: 0000000040000100 RSI: 0000200000001140 RDI: 0000000000000004 RBP: 00007f8501613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f85017e6128 R14: 00007f85017e6090 R15: 00007ffd0736dec8