If last gtoup has no enough space for group tables, then we
just ignore it.
Reported-by: Daniel Drake <dsd@xxxxxxxxxx>
Signed-off-by: Yongqiang Yang <xiaoqiangnk@xxxxxxxxx>
---
fs/ext4/resize.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 601fea1..7a961cc 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -199,7 +199,7 @@ static void free_flex_gd(struct ext4_new_flex_group_data *flex_gd)
*
* @sb: super block of fs to which the groups belongs
*/
-static void ext4_alloc_group_tables(struct super_block *sb,
+static int ext4_alloc_group_tables(struct super_block *sb,
struct ext4_new_flex_group_data *flex_gd,
int flexbg_size)
{
@@ -224,6 +224,8 @@ static void ext4_alloc_group_tables(struct super_block *sb,
(last_group & ~(flexbg_size - 1))));
next_group:
group = group_data[0].group;
+ if (src_group >= group_data[0].group + flex_gd->count)
+ return -EINVAL;
start_blk = ext4_group_first_block_no(sb, src_group);
last_blk = start_blk + group_data[src_group - group].blocks_count;
@@ -233,7 +235,6 @@ next_group:
start_blk += overhead;
- BUG_ON(src_group >= group_data[0].group + flex_gd->count);
/* We collect contiguous blocks as much as possible. */
src_group++;
for (; src_group <= last_group; src_group++)
@@ -298,6 +299,7 @@ next_group:
group_data[i].free_blocks_count);
}
}
+ return 0;
}
static struct buffer_head *bclean(handle_t *handle, struct super_block *sb,
@@ -1668,7 +1670,11 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
*/
while (ext4_setup_next_flex_gd(sb, flex_gd, n_blocks_count,
flexbg_size)) {
- ext4_alloc_group_tables(sb, flex_gd, flexbg_size);
+ err = ext4_alloc_group_tables(sb, flex_gd, flexbg_size);
+ if (err == -EINVAL) {
+ err = 0;
+ break;
+ }
err = ext4_flex_group_add(sb, resize_inode, flex_gd);
if (unlikely(err))
break;
--
1.7.5.1
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