syzbot

BUG: memory leak
unreferenced object 0xffff888131b41000 (size 40):
  comm "syz-executor.2", pid 17149, jiffies 4294966508 (age 33.030s)
  hex dump (first 32 bytes):
    29 ff b6 31 81 88 ff ff 00 00 00 00 00 00 00 00  )..1............
    00 00 00 00 00 00 00 00 0b 0c 00 00 09 00 00 00  ................
  backtrace:
    [<ffffffff81824c5a>] __es_alloc_extent fs/ext4/extents_status.c:467 [inline]
    [<ffffffff81824c5a>] __es_alloc_extent fs/ext4/extents_status.c:464 [inline]
    [<ffffffff81824c5a>] __es_insert_extent+0x28a/0x540 fs/ext4/extents_status.c:815
    [<ffffffff81826ef0>] ext4_es_insert_extent+0x1e0/0x890 fs/ext4/extents_status.c:882
    [<ffffffff81842145>] ext4_map_blocks+0x575/0xad0 fs/ext4/inode.c:680
    [<ffffffff81842790>] _ext4_get_block+0xf0/0x1a0 fs/ext4/inode.c:763
    [<ffffffff8183ead6>] ext4_block_write_begin+0x216/0x730 fs/ext4/inode.c:1043
    [<ffffffff8184b4e0>] ext4_write_begin+0x2a0/0x7c0 fs/ext4/inode.c:1183
    [<ffffffff8184bada>] ext4_da_write_begin+0xda/0x3c0 fs/ext4/inode.c:2867
    [<ffffffff814fcf36>] generic_perform_write+0x116/0x2e0 mm/filemap.c:3923
    [<ffffffff81829f20>] ext4_buffered_write_iter+0xa0/0x1a0 fs/ext4/file.c:299
    [<ffffffff8182a0d2>] ext4_file_write_iter+0xb2/0xde0 fs/ext4/file.c:722
    [<ffffffff81665edd>] __kernel_write_iter+0x10d/0x370 fs/read_write.c:517
    [<ffffffff8173cc81>] dump_emit_page fs/coredump.c:888 [inline]
    [<ffffffff8173cc81>] dump_user_range+0x141/0x3a0 fs/coredump.c:915
    [<ffffffff8172d344>] elf_core_dump+0x10c4/0x1570 fs/binfmt_elf.c:2142
    [<ffffffff8173c4c8>] do_coredump+0x19b8/0x2030 fs/coredump.c:764
    [<ffffffff812a2f92>] get_signal+0xf52/0xfb0 kernel/signal.c:2867
    [<ffffffff81132f69>] arch_do_signal_or_restart+0x39/0x280 arch/x86/kernel/signal.c:308