diff options
| -rw-r--r-- | fs/ext3/resize.c | 10 | ||||
| -rw-r--r-- | fs/ext3/super.c | 10 |
2 files changed, 20 insertions, 0 deletions
diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c index 34b39e9a1e5..a31dff81ed7 100644 --- a/fs/ext3/resize.c +++ b/fs/ext3/resize.c @@ -925,6 +925,16 @@ int ext3_group_extend(struct super_block *sb, struct ext3_super_block *es, if (n_blocks_count == 0 || n_blocks_count == o_blocks_count) return 0; + if (n_blocks_count > (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { + printk(KERN_ERR "EXT3-fs: filesystem on %s:" + " too large to resize to %lu blocks safely\n", + sb->s_id, n_blocks_count); + if (sizeof(sector_t) < 8) + ext3_warning(sb, __FUNCTION__, + "CONFIG_LBD not enabled\n"); + return -EINVAL; + } + if (n_blocks_count < o_blocks_count) { ext3_warning(sb, __FUNCTION__, "can't shrink FS - resize aborted"); diff --git a/fs/ext3/super.c b/fs/ext3/super.c index a60cc6ec130..df98a770925 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -1565,6 +1565,16 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent) goto failed_mount; } + if (le32_to_cpu(es->s_blocks_count) > + (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { + printk(KERN_ERR "EXT3-fs: filesystem on %s:" + " too large to mount safely\n", sb->s_id); + if (sizeof(sector_t) < 8) + printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not " + "enabled\n"); + goto failed_mount; + } + if (EXT3_BLOCKS_PER_GROUP(sb) == 0) goto cantfind_ext3; sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) - |