BUG: memory leak
unreferenced object 0xffff88811a80e380 (size 64):
  comm "syz-executor837", pid 6503, jiffies 4294942647 (age 13.320s)
  hex dump (first 32 bytes):
    01 00 00 00 20 77 72 69 00 00 00 00 65 62 75 67  .... wri....ebug
    90 e3 80 1a 81 88 ff ff 90 e3 80 1a 81 88 ff ff  ................
  backtrace:
    [<000000003487e1c6>] kmalloc include/linux/slab.h:554 [inline]
    [<000000003487e1c6>] do_eventfd+0x37/0x150 fs/eventfd.c:417
    [<000000005cdebdb8>] __do_sys_eventfd2 fs/eventfd.c:450 [inline]
    [<000000005cdebdb8>] __se_sys_eventfd2 fs/eventfd.c:448 [inline]
    [<000000005cdebdb8>] __x64_sys_eventfd2+0x16/0x20 fs/eventfd.c:448
    [<0000000062b03843>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<000000005fa0ba9c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff88811a80e400 (size 64):
  comm "syz-executor837", pid 6503, jiffies 4294942647 (age 13.320s)
  hex dump (first 32 bytes):
    e8 99 dd 00 00 c9 ff ff e8 99 dd 00 00 c9 ff ff  ................
    80 03 00 20 00 00 00 00 00 00 00 00 00 00 00 00  ... ............
  backtrace:
    [<000000002cfd7df9>] kmalloc include/linux/slab.h:554 [inline]
    [<000000002cfd7df9>] kzalloc include/linux/slab.h:666 [inline]
    [<000000002cfd7df9>] kvm_assign_ioeventfd_idx+0x52/0x260 arch/x86/kvm/../../../virt/kvm/eventfd.c:798
    [<00000000bb72c591>] kvm_assign_ioeventfd arch/x86/kvm/../../../virt/kvm/eventfd.c:934 [inline]
    [<00000000bb72c591>] kvm_ioeventfd+0xbe/0x197 arch/x86/kvm/../../../virt/kvm/eventfd.c:961
    [<00000000c3fe6a7b>] kvm_vm_ioctl+0x1e6/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3762
    [<00000000cf0723b7>] vfs_ioctl fs/ioctl.c:48 [inline]
    [<00000000cf0723b7>] __do_sys_ioctl fs/ioctl.c:753 [inline]
    [<00000000cf0723b7>] __se_sys_ioctl fs/ioctl.c:739 [inline]
    [<00000000cf0723b7>] __x64_sys_ioctl+0xd6/0x110 fs/ioctl.c:739
    [<0000000062b03843>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<000000005fa0ba9c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9