linux-ext4 - [Bug 199865] out-of-bound write in ext4_init_block_bitmap() when mounting and operating a crafted ext4 image

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Date:   Wed, 13 Jun 2018 15:42:31 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 199865] out-of-bound write in ext4_init_block_bitmap() when
 mounting and operating a crafted ext4 image

https://bugzilla.kernel.org/show_bug.cgi?id=199865

Theodore Tso (tytso@....edu) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tytso@....edu

--- Comment #3 from Theodore Tso (tytso@....edu) ---
This is no longer replicating on the tip of my ext4.git tree:

# /vdb/poc/do-865
[   25.099634] attempt to access beyond end of device
[   25.101223] loop0: rw=0, want=255510, limit=16384
[   25.103249] EXT2-fs (loop0): error: ext2_readdir: bad page in #2
[   25.105162] EXT2-fs (loop0): error: remounting filesystem read-only
[   25.108074] attempt to access beyond end of device
[   25.109576] loop0: rw=0, want=255510, limit=16384

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