linux-ext4 - [Bug 199977] ext4: use-after-free() detected by KASAN when mounting and operating a crafted ext4 image

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Message-ID: <bug-199977-13602-ogZXWG06Zk@https.bugzilla.kernel.org/>
Date:   Wed, 13 Jun 2018 15:33:16 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 199977] ext4: use-after-free() detected by KASAN when mounting
 and operating a crafted ext4 image

https://bugzilla.kernel.org/show_bug.cgi?id=199977

--- Comment #6 from Theodore Tso (tytso@....edu) ---
OK, so based on that, I'll treat #199977 as the original simplified poc.c and
image.  In which case it should be a dup of one of your other older, closed
bugs.

I'll also then mark #199997 as a dup of #200001, which is fixed via the two
patches I sent out for review.  (There is also a discussion on that thread
about how we should fix the more general problem of block type confusion and
verification.)

With these two patches, as far as I can tell we've cleared all of the bugs
you've opened relating to extended attributes, with the possible exception of
#20005, which is related to inline data, but which may also have some
relationship to ext4's xattr codepaths.

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