Commit 3f8a6411 authored by Theodore Ts'o's avatar Theodore Ts'o

ext4: add check for inodes_count overflow in new resize ioctl

Addresses-Red-Hat-Bugzilla: #913245
Reported-by: default avatarEric Sandeen <sandeen@redhat.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: default avatarCarlos Maiolino <cmaiolino@redhat.com>
Cc: stable@vger.kernel.org
parent 7f3e3c7c
......@@ -1882,6 +1882,10 @@ retry:
return 0;
n_group = ext4_get_group_number(sb, n_blocks_count - 1);
if (n_group > (0xFFFFFFFFUL / EXT4_INODES_PER_GROUP(sb))) {
ext4_warning(sb, "resize would cause inodes_count overflow");
return -EINVAL;
}
ext4_get_group_no_and_offset(sb, o_blocks_count - 1, &o_group, &offset);
n_desc_blocks = num_desc_blocks(sb, n_group + 1);
......
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