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: 15958 Comm: syz-executor.5 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_segcblist_enqueue+0xb9/0x130 kernel/rcu/rcu_segcblist.c:348 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4e 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 21 48 89 75 00 48 89 73 20 48 83 c4 08 5b 5d c3 48 RSP: 0018:ffffc9000bd87bc8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880b9d00080 RCX: ffffffff815bde20 RDX: 0000000000000000 RSI: ffffc9000bd87cb0 RDI: ffff8880b9d000a0 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff520017b0f6b R11: 0000000000000000 R12: ffffc9000bd87cb0 R13: ffff8880b9d00080 R14: 0000000000000000 R15: ffff8880b9d00040 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0063) knlGS:00000000f5525b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f54eadb0 CR3: 0000000077ed9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: srcu_gp_start_if_needed+0x116/0xbc0 kernel/rcu/srcutree.c:823 __call_srcu kernel/rcu/srcutree.c:883 [inline] __synchronize_srcu+0x21f/0x290 kernel/rcu/srcutree.c:929 kvm_mmu_uninit_vm+0x18/0x30 arch/x86/kvm/mmu/mmu.c:5585 kvm_arch_destroy_vm+0x4e7/0x680 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+0xdde/0x1810 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4541 __do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:972 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f2b549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f55255fc EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000000ae01 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace e7f6abd2f24d1eb3 ]--- RIP: 0010:rcu_segcblist_enqueue+0xb9/0x130 kernel/rcu/rcu_segcblist.c:348 Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4e 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 20 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 21 48 89 75 00 48 89 73 20 48 83 c4 08 5b 5d c3 48 RSP: 0018:ffffc9000bd87bc8 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff8880b9d00080 RCX: ffffffff815bde20 RDX: 0000000000000000 RSI: ffffc9000bd87cb0 RDI: ffff8880b9d000a0 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000003 R10: fffff520017b0f6b R11: 0000000000000000 R12: ffffc9000bd87cb0 R13: ffff8880b9d00080 R14: 0000000000000000 R15: ffff8880b9d00040 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0063) knlGS:00000000f5525b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f54eadb0 CR3: 0000000077ed9000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 75 4e jne 0x5c e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 15: fc ff df 18: 48 8b 6b 20 mov 0x20(%rbx),%rbp 1c: 48 89 ea mov %rbp,%rdx 1f: 48 c1 ea 03 shr $0x3,%rdx * 23: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 27: 75 21 jne 0x4a 29: 48 89 75 00 mov %rsi,0x0(%rbp) 2d: 48 89 73 20 mov %rsi,0x20(%rbx) 31: 48 83 c4 08 add $0x8,%rsp 35: 5b pop %rbx 36: 5d pop %rbp 37: c3 retq 38: 48 rex.W