tree 13377b3af05352efef57e5c05198e74b0323cb54
parent 147117cf23c0ba452f80409aec9c0be978232698
author Theodore Ts'o <tytso@mit.edu> 1479492024 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1480150492 +0100

ext4: sanity check the block and cluster size at mount time

commit 8cdf3372fe8368f56315e66bea9f35053c418093 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>