diff options
| -rw-r--r-- | fs/ext4/ext4.h | 2 | ||||
| -rw-r--r-- | fs/ext4/mballoc.c | 20 | ||||
| -rw-r--r-- | fs/ext4/resize.c | 10 |
3 files changed, 23 insertions, 9 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index bbe81db76c71..da7ab48948f2 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1799,7 +1799,7 @@ extern void ext4_free_blocks(handle_t *handle, struct inode *inode, unsigned long count, int flags); extern int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t i, struct ext4_group_desc *desc); -extern void ext4_group_add_blocks(handle_t *handle, struct super_block *sb, +extern int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, ext4_fsblk_t block, unsigned long count); extern int ext4_trim_fs(struct super_block *, struct fstrim_range *); diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 93035ea70c0b..dbe429567eb3 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4675,7 +4675,7 @@ error_return: * * This marks the blocks as free in the bitmap and buddy. */ -void ext4_group_add_blocks(handle_t *handle, struct super_block *sb, +int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, ext4_fsblk_t block, unsigned long count) { struct buffer_head *bitmap_bh = NULL; @@ -4696,15 +4696,24 @@ void ext4_group_add_blocks(handle_t *handle, struct super_block *sb, * Check to see if we are freeing blocks across a group * boundary. */ - if (bit + count > EXT4_BLOCKS_PER_GROUP(sb)) + if (bit + count > EXT4_BLOCKS_PER_GROUP(sb)) { + ext4_warning(sb, "too much blocks added to group %u\n", + block_group); + err = -EINVAL; goto error_return; + } bitmap_bh = ext4_read_block_bitmap(sb, block_group); - if (!bitmap_bh) + if (!bitmap_bh) { + err = -EIO; goto error_return; + } + desc = ext4_get_group_desc(sb, block_group, &gd_bh); - if (!desc) + if (!desc) { + err = -EIO; goto error_return; + } if (in_range(ext4_block_bitmap(sb, desc), block, count) || in_range(ext4_inode_bitmap(sb, desc), block, count) || @@ -4714,6 +4723,7 @@ void ext4_group_add_blocks(handle_t *handle, struct super_block *sb, ext4_error(sb, "Adding blocks in system zones - " "Block = %llu, count = %lu", block, count); + err = -EINVAL; goto error_return; } @@ -4782,7 +4792,7 @@ void ext4_group_add_blocks(handle_t *handle, struct super_block *sb, error_return: brelse(bitmap_bh); ext4_std_error(sb, err); - return; + return err; } /** diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index d241ecbb0d53..4c041e37f61f 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -980,7 +980,7 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es, ext4_grpblk_t add; struct buffer_head *bh; handle_t *handle; - int err; + int err, err2; ext4_group_t group; o_blocks_count = ext4_blocks_count(es); @@ -1056,11 +1056,15 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es, ext4_debug("freeing blocks %llu through %llu\n", o_blocks_count, o_blocks_count + add); /* We add the blocks to the bitmap and set the group need init bit */ - ext4_group_add_blocks(handle, sb, o_blocks_count, add); + err = ext4_group_add_blocks(handle, sb, o_blocks_count, add); ext4_handle_dirty_super(handle, sb); ext4_debug("freed blocks %llu through %llu\n", o_blocks_count, o_blocks_count + add); - if ((err = ext4_journal_stop(handle))) + err2 = ext4_journal_stop(handle); + if (!err && err2) + err = err2; + + if (err) goto exit_put; if (test_opt(sb, DEBUG)) |