BUG: spinlock bad magic on CPU#1, syz-executor.4/32092 lock: 0xffff8880b9d00040, .magic: 00000000, .owner: /-1, .owner_cpu: 0 CPU: 1 PID: 32092 Comm: syz-executor.4 Not tainted 5.14.0-rc7-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+0x1ae/0x29f lib/dump_stack.c:105 spin_dump kernel/locking/spinlock_debug.c:67 [inline] spin_bug kernel/locking/spinlock_debug.c:75 [inline] debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] do_raw_spin_lock+0x627/0x8e0 kernel/locking/spinlock_debug.c:112 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0xbf/0x100 kernel/locking/spinlock.c:159 srcu_might_be_idle kernel/rcu/srcutree.c:767 [inline] synchronize_srcu+0xb3/0x1c0 kernel/rcu/srcutree.c:1008 kvm_mmu_uninit_vm+0x18/0x30 arch/x86/kvm/mmu/mmu.c:5585 kvm_arch_destroy_vm+0x5f6/0x6b0 arch/x86/kvm/x86.c:11277 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1060 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4486 [inline] kvm_dev_ioctl+0x15aa/0x2080 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4541 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:1055 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe3d0b83188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff2408f1ff R14: 00007fe3d0b83300 R15: 0000000000022000 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 32092 Comm: syz-executor.4 Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_segcblist_enqueue+0x9c/0xc0 kernel/rcu/rcu_segcblist.c:348 Code: c7 06 00 00 00 00 48 83 c3 20 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 ce c7 5c 00 4c 8b 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 35 c8 5c 00 4d 89 37 4c 89 33 5b RSP: 0018:ffffc9000a42fb18 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880b9d000a0 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffc9000a42fc40 RDI: ffff8880b9d000c8 RBP: 1ffff9200148f3e8 R08: dffffc0000000000 R09: 0000000000000003 R10: fffff52001485f45 R11: 0000000000000004 R12: dffffc0000000000 R13: ffff8880b9d00040 R14: ffffc9000a42fc40 R15: 0000000000000000 FS: 00007fe3d0b83700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002994808 CR3: 000000001cd27000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: srcu_gp_start_if_needed+0x15a/0x930 kernel/rcu/srcutree.c:823 __call_srcu kernel/rcu/srcutree.c:883 [inline] __synchronize_srcu+0x291/0x340 kernel/rcu/srcutree.c:929 kvm_mmu_uninit_vm+0x18/0x30 arch/x86/kvm/mmu/mmu.c:5585 kvm_arch_destroy_vm+0x5f6/0x6b0 arch/x86/kvm/x86.c:11277 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1060 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:4486 [inline] kvm_dev_ioctl+0x15aa/0x2080 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4541 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:1069 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:1055 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe3d0b83188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff2408f1ff R14: 00007fe3d0b83300 R15: 0000000000022000 Modules linked in: ---[ end trace 9bc8827e6f28d46e ]--- RIP: 0010:rcu_segcblist_enqueue+0x9c/0xc0 kernel/rcu/rcu_segcblist.c:348 Code: c7 06 00 00 00 00 48 83 c3 20 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 ce c7 5c 00 4c 8b 3b 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 35 c8 5c 00 4d 89 37 4c 89 33 5b RSP: 0018:ffffc9000a42fb18 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff8880b9d000a0 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffc9000a42fc40 RDI: ffff8880b9d000c8 RBP: 1ffff9200148f3e8 R08: dffffc0000000000 R09: 0000000000000003 R10: fffff52001485f45 R11: 0000000000000004 R12: dffffc0000000000 R13: ffff8880b9d00040 R14: ffffc9000a42fc40 R15: 0000000000000000 FS: 00007fe3d0b83700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002994808 CR3: 000000001cd27000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c7 06 00 00 00 00 movl $0x0,(%rsi) 6: 48 83 c3 20 add $0x20,%rbx a: 48 89 d8 mov %rbx,%rax d: 48 c1 e8 03 shr $0x3,%rax 11: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 16: 74 08 je 0x20 18: 48 89 df mov %rbx,%rdi 1b: e8 ce c7 5c 00 callq 0x5cc7ee 20: 4c 8b 3b mov (%rbx),%r15 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ff mov %r15,%rdi 34: e8 35 c8 5c 00 callq 0x5cc86e 39: 4d 89 37 mov %r14,(%r15) 3c: 4c 89 33 mov %r14,(%rbx) 3f: 5b pop %rbx