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Date: Fri, 22 Jul 2022 09:58:17 -0400 From: "Theodore Ts'o" <tytso@....edu> To: linux-ext4@...r.kernel.org, Lukas Czerner <lczerner@...hat.com> Cc: "Theodore Ts'o" <tytso@....edu>, syzbot+15cd994e273307bf5cfa@...kaller.appspotmail.com, tadeusz.struk@...aro.org Subject: Re: [PATCH] ext4: block range must be validated before use in ext4_mb_clear_bb() On Thu, 14 Jul 2022 18:59:03 +0200, Lukas Czerner wrote: > Block range to free is validated in ext4_free_blocks() using > ext4_inode_block_valid() and then it's passed to ext4_mb_clear_bb(). > However in some situations on bigalloc file system the range might be > adjusted after the validation in ext4_free_blocks() which can lead to > troubles on corrupted file systems such as one found by syzkaller that > resulted in the following BUG > > [...] Applied, thanks! [1/1] ext4: block range must be validated before use in ext4_mb_clear_bb() commit: 91e204c46741b198693dd88bd7b03a5b5fe0ce17 Best regards, -- Theodore Ts'o <tytso@....edu>
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