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-rw-r--r--fs/btrfs/file-item.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index edb69b4d5335..89af104c7569 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -284,6 +284,7 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
struct btrfs_ordered_sum *sums;
struct btrfs_sector_sum *sector_sum;
struct btrfs_csum_item *item;
+ LIST_HEAD(tmplist);
unsigned long offset;
int ret;
size_t size;
@@ -358,7 +359,10 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
MAX_ORDERED_SUM_BYTES(root));
sums = kzalloc(btrfs_ordered_sum_size(root, size),
GFP_NOFS);
- BUG_ON(!sums);
+ if (!sums) {
+ ret = -ENOMEM;
+ goto fail;
+ }
sector_sum = sums->sums;
sums->bytenr = start;
@@ -380,12 +384,19 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
offset += csum_size;
sector_sum++;
}
- list_add_tail(&sums->list, list);
+ list_add_tail(&sums->list, &tmplist);
}
path->slots[0]++;
}
ret = 0;
fail:
+ while (ret < 0 && !list_empty(&tmplist)) {
+ sums = list_entry(&tmplist, struct btrfs_ordered_sum, list);
+ list_del(&sums->list);
+ kfree(sums);
+ }
+ list_splice_tail(&tmplist, list);
+
btrfs_free_path(path);
return ret;
}