ext4: add error processing when calling ext4_mb_init_cache in mballoc From: Shen Feng Add error processing for ext4_mb_load_buddy when it calls ext4_mb_init_cache. Signed-off-by: Shen Feng Reviewed-by: Aneesh Kumar K.V Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o" --- fs/ext4/mballoc.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) Index: linux-2.6.26-rc9/fs/ext4/mballoc.c =================================================================== --- linux-2.6.26-rc9.orig/fs/ext4/mballoc.c 2008-07-11 16:04:58.000000000 -0700 +++ linux-2.6.26-rc9/fs/ext4/mballoc.c 2008-07-11 16:04:58.000000000 -0700 @@ -890,6 +890,7 @@ ext4_mb_load_buddy(struct super_block *s int pnum; int poff; struct page *page; + int ret; mb_debug("load group %lu\n", group); @@ -921,15 +922,21 @@ ext4_mb_load_buddy(struct super_block *s if (page) { BUG_ON(page->mapping != inode->i_mapping); if (!PageUptodate(page)) { - ext4_mb_init_cache(page, NULL); + ret = ext4_mb_init_cache(page, NULL); + if (ret) { + unlock_page(page); + goto err; + } mb_cmp_bitmaps(e4b, page_address(page) + (poff * sb->s_blocksize)); } unlock_page(page); } } - if (page == NULL || !PageUptodate(page)) + if (page == NULL || !PageUptodate(page)) { + ret = -EIO; goto err; + } e4b->bd_bitmap_page = page; e4b->bd_bitmap = page_address(page) + (poff * sb->s_blocksize); mark_page_accessed(page); @@ -945,14 +952,20 @@ ext4_mb_load_buddy(struct super_block *s page = find_or_create_page(inode->i_mapping, pnum, GFP_NOFS); if (page) { BUG_ON(page->mapping != inode->i_mapping); - if (!PageUptodate(page)) - ext4_mb_init_cache(page, e4b->bd_bitmap); - + if (!PageUptodate(page)) { + ret = ext4_mb_init_cache(page, e4b->bd_bitmap); + if (ret) { + unlock_page(page); + goto err; + } + } unlock_page(page); } } - if (page == NULL || !PageUptodate(page)) + if (page == NULL || !PageUptodate(page)) { + ret = -EIO; goto err; + } e4b->bd_buddy_page = page; e4b->bd_buddy = page_address(page) + (poff * sb->s_blocksize); mark_page_accessed(page); @@ -969,7 +982,7 @@ err: page_cache_release(e4b->bd_buddy_page); e4b->bd_buddy = NULL; e4b->bd_bitmap = NULL; - return -EIO; + return ret; } static void ext4_mb_release_desc(struct ext4_buddy *e4b)