BUG: memory leak
unreferenced object 0xffff88810b0efb80 (size 96):
  comm "syz-executor.0", pid 5519, jiffies 4294943803 (age 8.540s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 88 fb 0e 0b 81 88 ff ff  ................
    88 fb 0e 0b 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff81545984>] kmalloc_trace+0x24/0x90 mm/slab_common.c:1057
    [<ffffffff81c5c24e>] kmalloc include/linux/slab.h:559 [inline]
    [<ffffffff81c5c24e>] autofs_wait+0x3fe/0x9a0 fs/autofs/waitq.c:378
    [<ffffffff81c5d54b>] autofs_do_expire_multi+0xab/0x3e0 fs/autofs/expire.c:593
    [<ffffffff81c5d8d7>] autofs_expire_multi+0x57/0x80 fs/autofs/expire.c:619
    [<ffffffff81c5b582>] autofs_root_ioctl_unlocked+0x322/0x3b0 fs/autofs/root.c:897
    [<ffffffff81c5b6a9>] autofs_root_ioctl+0x29/0x40 fs/autofs/root.c:910
    [<ffffffff8167f960>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff8167f960>] __do_sys_ioctl fs/ioctl.c:870 [inline]
    [<ffffffff8167f960>] __se_sys_ioctl fs/ioctl.c:856 [inline]
    [<ffffffff8167f960>] __x64_sys_ioctl+0x100/0x140 fs/ioctl.c:856
    [<ffffffff84a137b9>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84a137b9>] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd