diff options
Diffstat (limited to 'fs/ext4/mballoc.c')
| -rw-r--r-- | fs/ext4/mballoc.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 3555e72f149c..c713d06e70b7 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -493,6 +493,8 @@ static void mb_mark_used_double(struct ext4_buddy *e4b, int first, int count) static void mb_cmp_bitmaps(struct ext4_buddy *e4b, void *bitmap) { + if (unlikely(e4b->bd_info->bb_bitmap == NULL)) + return; if (memcmp(e4b->bd_info->bb_bitmap, bitmap, e4b->bd_sb->s_blocksize)) { unsigned char *b1, *b2; int i; @@ -517,10 +519,15 @@ static void mb_group_bb_bitmap_alloc(struct super_block *sb, struct buffer_head *bh; grp->bb_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS); - BUG_ON(grp->bb_bitmap == NULL); + if (!grp->bb_bitmap) + return; bh = ext4_read_block_bitmap(sb, group); - BUG_ON(IS_ERR_OR_NULL(bh)); + if (IS_ERR_OR_NULL(bh)) { + kfree(grp->bb_bitmap); + grp->bb_bitmap = NULL; + return; + } memcpy(grp->bb_bitmap, bh->b_data, sb->s_blocksize); put_bh(bh); |