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Date: Fri, 17 Jun 2022 22:59:03 -0400 From: "Theodore Ts'o" <tytso@....edu> To: linux-ext4@...r.kernel.org, Zhang Yi <yi.zhang@...wei.com> Cc: "Theodore Ts'o" <tytso@....edu>, ritesh.list@...il.com, yukuai3@...wei.com, jack@...e.cz, adilger.kernel@...ger.ca 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 <tytso@....edu>
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