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: 0 PID: 12686 Comm: syz-executor081 Not tainted 4.17.0-rc2+ #23 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:ffff8801d7cc7108 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 1ffff1003af98e3e RDX: 0000000000000000 RSI: ffffffff8768eeed RDI: ffff8801aa0cc0e8 RBP: ffff8801d7cc71a8 R08: ffff8801ae3120c0 R09: ffffed0035419801 R10: ffff8801d7cc72b8 R11: ffff8801aa0cc00f R12: 0000000000000000 R13: ffff8801aa0cc0e8 R14: 0000000000000001 R15: ffff8801d7cc7230 FS: 0000000001ead940(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000100 CR3: 00000001b19bf000 CR4: 00000000001426f0 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 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1cf/0x16a0 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441a49 RSP: 002b:00007fffd9e0fb58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441a49 RDX: 0000000020000000 RSI: 000000004018aebd RDI: 0000000000000004 RBP: 0000000000000000 R08: 000000000000318d R09: 000000000000318d R10: 000000000000318d R11: 0000000000000246 R12: 000000000001a8af R13: 00000000006cd448 R14: 0000000000000000 R15: 0000000000000000 Code: 3f 9a 88 48 c7 45 88 80 ee 68 87 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 c7 40 08 f3 f3 f3 f3 e8 a3 51 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: ffff8801d7cc7108 RIP: __radix_tree_delete+0x74/0x230 lib/radix-tree.c:1989 RSP: ffff8801d7cc7108 ---[ end trace 10461d591193104b ]---