BUG: memory leak
unreferenced object 0xffff88801aa25d98 (size 40):
  comm "syz-executor.0", pid 10168, jiffies 4294966816 (age 19.490s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 08 bc 81 1a 80 88 ff ff  ................
    18 f6 33 08 80 88 ff ff f6 0c 00 00 06 00 00 00  ..3.............
  backtrace:
    [<ffffffff8184b96a>] __es_alloc_extent fs/ext4/extents_status.c:467 [inline]
    [<ffffffff8184b96a>] __es_alloc_extent fs/ext4/extents_status.c:464 [inline]
    [<ffffffff8184b96a>] __es_insert_extent+0x28a/0x540 fs/ext4/extents_status.c:815
    [<ffffffff8184dbed>] ext4_es_insert_extent+0x1fd/0x840 fs/ext4/extents_status.c:888
    [<ffffffff81868cd5>] ext4_map_blocks+0x575/0xad0 fs/ext4/inode.c:680
    [<ffffffff81869320>] _ext4_get_block+0xf0/0x1a0 fs/ext4/inode.c:763
    [<ffffffff81865676>] ext4_block_write_begin+0x216/0x730 fs/ext4/inode.c:1043
    [<ffffffff81871f51>] ext4_write_begin+0x2a1/0x7c0 fs/ext4/inode.c:1183
    [<ffffffff81872550>] ext4_da_write_begin+0xe0/0x3c0 fs/ext4/inode.c:2865
    [<ffffffff8151b293>] generic_perform_write+0x113/0x2e0 mm/filemap.c:3945
    [<ffffffff81850b90>] ext4_buffered_write_iter+0xa0/0x1a0 fs/ext4/file.c:299
    [<ffffffff81850d45>] ext4_file_write_iter+0xb5/0xd10 fs/ext4/file.c:717
    [<ffffffff81688fad>] __kernel_write_iter+0x10d/0x370 fs/read_write.c:517
    [<ffffffff817625d1>] dump_emit_page fs/coredump.c:888 [inline]
    [<ffffffff817625d1>] dump_user_range+0x141/0x3a0 fs/coredump.c:915
    [<ffffffff81752ca4>] elf_core_dump+0x10c4/0x1570 fs/binfmt_elf.c:2142
    [<ffffffff81761e18>] do_coredump+0x19b8/0x2030 fs/coredump.c:764
    [<ffffffff812b66e2>] get_signal+0xf52/0x1010 kernel/signal.c:2878
    [<ffffffff81133a92>] arch_do_signal_or_restart+0x42/0x490 arch/x86/kernel/signal.c:309