BUG: memory leak
unreferenced object 0xffff888009101b00 (size 64):
  comm "syz-executor.6", pid 17897, jiffies 4298250635 (age 32.187s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000c403ce02>] kmalloc_node include/linux/slab.h:575 [inline]
    [<00000000c403ce02>] kzalloc_node include/linux/slab.h:675 [inline]
    [<00000000c403ce02>] disk_expand_part_tbl+0x181/0x3b0 block/genhd.c:1522
    [<00000000b84fa65b>] __alloc_disk_node+0x112/0x390 block/genhd.c:1737
    [<00000000b18f00d4>] loop_add+0x38c/0x8b0 drivers/block/loop.c:2137
    [<00000000b4a6731c>] loop_control_ioctl drivers/block/loop.c:2272 [inline]
    [<00000000b4a6731c>] loop_control_ioctl+0x170/0x480 drivers/block/loop.c:2254
    [<00000000858848d8>] vfs_ioctl fs/ioctl.c:48 [inline]
    [<00000000858848d8>] __do_sys_ioctl fs/ioctl.c:753 [inline]
    [<00000000858848d8>] __se_sys_ioctl fs/ioctl.c:739 [inline]
    [<00000000858848d8>] __x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739
    [<00000000f6319f29>] do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
    [<000000005970820b>] entry_SYSCALL_64_after_hwframe+0x61/0xc6

BUG: leak checking failed