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Date:   Fri, 17 Jun 2022 22:59:03 -0400
From:   "Theodore Ts'o" <>
To:, Zhang Yi <>
Cc:     "Theodore Ts'o" <>,,,,
Subject: Re: [PATCH v2] ext4: add reserved GDT blocks check

On Wed, 1 Jun 2022 17:27:17 +0800, Zhang Yi wrote:
> We capture a NULL pointer issue when resizing a corrupt ext4 image which
> is freshly clear resize_inode feature (not run e2fsck). It could be
> simply reproduced by following steps. The problem is because of the
> resize_inode feature was cleared, and it will convert the filesystem to
> meta_bg mode in ext4_resize_fs(), but the es->s_reserved_gdt_blocks was
> not reduced to zero, so could we mistakenly call reserve_backup_gdb()
> and passing an uninitialized resize_inode to it when adding new group
> descriptors.
> [...]

Applied, thanks!

[1/1] ext4: add reserved GDT blocks check
      commit: 7dc0ff3a33ea92cefaf032a6d0de9314a9a5fb20

Best regards,
Theodore Ts'o <>

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