BUG: memory leak
unreferenced object 0xffff888109cee700 (size 256):
  comm "syz-executor271", pid 5079, jiffies 4294949860 (age 8.230s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    20 04 e9 00 81 88 ff ff c0 93 87 0e 81 88 ff ff   ...............
  backtrace:
    [<ffffffff8160be8f>] kmem_cache_zalloc include/linux/slab.h:710 [inline]
    [<ffffffff8160be8f>] __alloc_file+0x1f/0xf0 fs/file_table.c:138
    [<ffffffff8160ca99>] alloc_empty_file_noaccount+0x19/0x50 fs/file_table.c:209
    [<ffffffff816204d6>] vfs_tmpfile_open+0x26/0x90 fs/namei.c:3645
    [<ffffffff81c2d883>] ovl_do_tmpfile fs/overlayfs/overlayfs.h:331 [inline]
    [<ffffffff81c2d883>] ovl_copy_up_tmpfile fs/overlayfs/copy_up.c:785 [inline]
    [<ffffffff81c2d883>] ovl_do_copy_up fs/overlayfs/copy_up.c:877 [inline]
    [<ffffffff81c2d883>] ovl_copy_up_one+0xeb3/0x1710 fs/overlayfs/copy_up.c:1045
    [<ffffffff81c2e1e7>] ovl_copy_up_flags+0x107/0x170 fs/overlayfs/copy_up.c:1091
    [<ffffffff81c20075>] ovl_setattr+0xa5/0x270 fs/overlayfs/inode.c:45
    [<ffffffff816430df>] notify_change+0x7cf/0xb20 fs/attr.c:482
    [<ffffffff81603209>] chown_common+0x399/0x3d0 fs/open.c:736
    [<ffffffff81603320>] do_fchownat+0xe0/0x180 fs/open.c:767
    [<ffffffff816034a5>] __do_sys_lchown fs/open.c:792 [inline]
    [<ffffffff816034a5>] __se_sys_lchown fs/open.c:790 [inline]
    [<ffffffff816034a5>] __x64_sys_lchown+0x25/0x30 fs/open.c:790
    [<ffffffff848ed5c5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff848ed5c5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84a00087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd