linux-ext4 - [PATCH 0/2 v2] ext4: Fix crash when adding entry to corrupted directory

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Message-Id: <20220518093143.20955-1-jack@suse.cz>
Date:   Wed, 18 May 2022 11:33:27 +0200
From:   Jan Kara <jack@...e.cz>
To:     Ted Tso <tytso@....edu>
Cc:     <linux-ext4@...r.kernel.org>, Jan Kara <jack@...e.cz>
Subject: [PATCH 0/2 v2] ext4: Fix crash when adding entry to corrupted directory

Hello,

two patches in this series try to fix a crash when adding directory entry to a
directory with corrupted h-tree. Since I don't have the filesystem image
causing the crash, I'm not sure what was the cause but the stacktrace suggests
we have corrupted one h-tree node while modifying another one so likely
there was a cycle created in the h-tree. This series checks for it and bails
out early.

Changes since v1:
* Fixed compilation error in the first patch (which got fixed in the second
  patch)
* Fixed stack corruption issue with largedir feature

								Honza

Previous versions:
Link: http://lore.kernel.org/r/20220428180355.15209-1-jack@suse.cz # v1