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(parent: 0f0909e) | patch
ext4: sanity check the block and cluster size at mount time
authorTheodore Ts'o <tytso@mit.edu>
Fri, 18 Nov 2016 18:00:24 +0000 (13:00 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Sun, 20 Nov 2016 01:58:15 +0000 (20:58 -0500)
commit8cdf3372fe8368f56315e66bea9f35053c418093
treece03e6d1c641f2eac33bb811c1ac260c8b2d2c23tree | snapshot (tar.gz zip)
parent0f0909e242f73c1154272cf04f07fc9afe13e5b8commit | diff
ext4: sanity check the block and cluster size at mount time

If the block size or cluster size is insane, reject the mount.  This
is important for security reasons (although we shouldn't be just
depending on this check).

Ref: http://www.securityfocus.com/archive/1/539661
Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1332506
Reported-by: Borislav Petkov <bp@alien8.de>
Reported-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
fs/ext4/ext4.h diff | blob | blame | history
fs/ext4/super.c diff | blob | blame | history