[Bug 265071] ext2fs: fix potential memory leak in ext4_ext_grow_indepth()

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 07 Jul 2022 06:35:33 UTC

--- Comment #1 from niejianglei2021@163.com <niejianglei2021@163.com> ---
ext4_ext_grow_indepth() allocates memory chunk for "newblk" with
ext4_ext_alloc_meta(). When getblk() and bwrite() fail in this funciton,
"newblk" is not released, which will lead to a memory leak.

We should release the "newblk" with ext4_ext_blkfree() when some error
occurs to avoid the memory leak.

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