kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 20692 Comm: syz-executor7 Not tainted 4.17.0-rc4+ #71 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:__radix_tree_delete+0x74/0x230 lib/radix-tree.c:1989 RSP: 0018:ffff8801ad35f168 EFLAGS: 00010206 RAX: 0000000000000003 RBX: dffffc0000000000 RCX: ffffc90007cc7000 RDX: 000000000000005f RSI: ffffffff8769230d RDI: ffff880195fb8028 RBP: ffff8801ad35f208 R08: ffff8801c977e480 R09: ffffed0032bf6fe9 R10: ffff8801ad35f318 R11: ffff880195fb7f4f R12: 0000000000000000 R13: ffff880195fb8028 R14: 0000000000000018 R15: ffff8801ad35f290 FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f5ef7b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000000844eabc CR3: 00000001d77db000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: radix_tree_delete_item+0x148/0x2d0 lib/radix-tree.c:2050 idr_remove+0x46/0x60 lib/idr.c:157 kvm_hv_eventfd_deassign arch/x86/kvm/hyperv.c:1433 [inline] kvm_vm_ioctl_hv_eventfd+0x1df/0x24b arch/x86/kvm/hyperv.c:1451 kvm_arch_vm_ioctl+0x155e/0x2690 arch/x86/kvm/x86.c:4563 kvm_vm_ioctl+0x246/0x1d90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3100 kvm_vm_compat_ioctl+0x13b/0x420 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3141 __do_compat_sys_ioctl fs/compat_ioctl.c:1461 [inline] __se_compat_sys_ioctl fs/compat_ioctl.c:1407 [inline] __ia32_compat_sys_ioctl+0x221/0x640 fs/compat_ioctl.c:1407 do_syscall_32_irqs_on arch/x86/entry/common.c:323 [inline] do_fast_syscall_32+0x345/0xf9b arch/x86/entry/common.c:394 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f1ccb9 RSP: 002b:00000000f5ef70ac EFLAGS: 00000282 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000017 RCX: 000000004018aebd RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: 48 9a 88 48 c7 45 88 a0 22 69 87 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 e3 1b 10 fa 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 0f 85 97 01 00 00 48 8d 55 d8 4c 8d 7a c0 49 8b 1e RIP: __read_once_size include/linux/compiler.h:188 [inline] RSP: ffff8801ad35f168 RIP: __radix_tree_delete+0x74/0x230 lib/radix-tree.c:1989 RSP: ffff8801ad35f168 ---[ end trace 7767753e27b621bf ]---