diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2013-04-21 22:56:32 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-11 13:48:09 -0700 |
| commit | 5d96a5f6c32bc97f2f2ff8e614de09ce6e2431c0 (patch) | |
| tree | ec4e257aa6babbcdd420a683167c03d3b20b2151 /fs | |
| parent | 4cd9d968a1e09ea2dc765bca9184b8a7aaafb435 (diff) | |
ext4: add check for inodes_count overflow in new resize ioctl
commit 3f8a6411fbada1fa482276591e037f3b1adcf55b upstream.
Addresses-Red-Hat-Bugzilla: #913245
Reported-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Lingzhu Xiang <lxiang@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/resize.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 9202b22383c..86a8c88dc29 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -1630,6 +1630,10 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count) return 0; ext4_get_group_no_and_offset(sb, n_blocks_count - 1, &n_group, &offset); + 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 = (n_group + EXT4_DESC_PER_BLOCK(sb)) / |