tree ccf89cb1205e0ec2b0eb1b000dd566393375b93e
parent 3cac26f2a2c66f755e033ca944d02433be684556
author Jan Kara <jack@suse.cz> 1528884562 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1530609797 +0200

udf: Detect incorrect directory size

commit fa65653e575fbd958bdf5fb9c4a71a324e39510d upstream.

Detect when a directory entry is (possibly partially) beyond directory
size and return EIO in that case since it means the filesystem is
corrupted. Otherwise directory operations can further corrupt the
directory and possibly also oops the kernel.

CC: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
CC: stable@vger.kernel.org
Reported-and-tested-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>