ext2: Add sanity checks for group and filesystem size
Add sanity check that filesystem size does not exceed the underlying device size and that group size is big enough so that metadata can fit into it. This avoid trying to mount some crafted filesystems with extremely large group counts. Reported-by:<syzbot+0f2f7e65a3007d39539f@syzkaller.appspotmail.com> Reported-by: kernel test robot <oliver.sang@intel.com> # Test fixup CC: stable@vger.kernel.org Signed-off-by:
Jan Kara <jack@suse.cz>
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