------------[ cut here ]------------ pvqspinlock: lock 0xffff888117a30790 has corrupted value 0x0! WARNING: kernel/locking/qspinlock_paravirt.h:506 at __pv_queued_spin_unlock_slowpath+0x1de/0x2d0 kernel/locking/qspinlock_paravirt.h:504, CPU#1: syz.4.2010/7041 Modules linked in: CPU: 1 UID: 0 PID: 7041 Comm: syz.4.2010 Not tainted syzkaller #0 PREEMPT 7a1f1c0657683ed9eb126354173fd73712839b55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:__pv_queued_spin_unlock_slowpath+0x20a/0x2d0 kernel/locking/qspinlock_paravirt.h:504 Code: df be 04 00 00 00 4d 89 c7 e8 52 2d 29 fc 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 a4 00 00 00 8b 13 4c 89 f7 48 89 de <67> 48 0f b9 3a eb 95 48 c7 c7 e0 ff 92 87 4c 89 f6 4c 89 fa e8 0d RSP: 0018:ffffc90002c8edc8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888117a30790 RCX: ffffffff85e001ee RDX: 0000000000000000 RSI: ffff888117a30790 RDI: ffffffff882eed30 RBP: ffffc90002c8edf0 R08: ffff888117a30793 R09: 1ffff11022f460f2 R10: dffffc0000000000 R11: ffffed1022f460f3 R12: ffff8881140d8ff8 R13: dffffc0000000000 R14: ffffffff882eed30 R15: dffffc0000000000 FS: 00007f46e3e9d6c0(0000) GS:ffff88826dd96000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000012f44e000 CR4: 00000000003526b0 Call Trace: __raw_callee_save___pv_queued_spin_unlock_slowpath+0x19/0x40 .slowpath+0x9/0x13 pv_queued_spin_unlock kernel/locking/spinlock.c:189 [inline] queued_spin_unlock arch/x86/include/asm/paravirt-spinlock.h:72 [inline] do_raw_spin_unlock include/linux/spinlock.h:205 [inline] __raw_spin_unlock include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock+0xd/0x30 kernel/locking/spinlock.c:190 spin_unlock include/linux/spinlock.h:390 [inline] hv_tlb_flush_enqueue+0x1b5/0x290 arch/x86/kvm/hyperv.c:1962 kvm_hv_flush_tlb+0x9be/0x1fb0 arch/x86/kvm/hyperv.c:2143 kvm_hv_hypercall+0xf4d/0x1c80 arch/x86/kvm/hyperv.c:-1 kvm_emulate_hypercall+0x94/0x110 arch/x86/kvm/x86.c:10538 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6820 [inline] vmx_handle_exit+0x1235/0x1990 arch/x86/kvm/vmx/vmx.c:6830 vcpu_enter_guest arch/x86/kvm/x86.c:11608 [inline] vcpu_run+0x5534/0x6f80 arch/x86/kvm/x86.c:11765 kvm_arch_vcpu_ioctl_run+0x1156/0x1bc0 arch/x86/kvm/x86.c:12120 kvm_vcpu_ioctl+0xad0/0x11a0 virt/kvm/kvm_main.c:4469 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0x122/0x1a0 fs/ioctl.c:583 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:583 x64_sys_call+0x1581/0x3040 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe6/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f46e2f9c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f46e3e9d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f46e3215fa0 RCX: 00007f46e2f9c819 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006 RBP: 00007f46e3032c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f46e3216038 R14: 00007f46e3215fa0 R15: 00007ffd63a27028 ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: df be 04 00 00 00 fistpll 0x4(%rsi) 6: 4d 89 c7 mov %r8,%r15 9: e8 52 2d 29 fc call 0xfc292d60 e: 48 89 d8 mov %rbx,%rax 11: 48 c1 e8 03 shr $0x3,%rax 15: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax 1a: 84 c0 test %al,%al 1c: 0f 85 a4 00 00 00 jne 0xc6 22: 8b 13 mov (%rbx),%edx 24: 4c 89 f7 mov %r14,%rdi 27: 48 89 de mov %rbx,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: eb 95 jmp 0xffffffc6 31: 48 c7 c7 e0 ff 92 87 mov $0xffffffff8792ffe0,%rdi 38: 4c 89 f6 mov %r14,%rsi 3b: 4c 89 fa mov %r15,%rdx 3e: e8 .byte 0xe8 3f: 0d .byte 0xd