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-rw-r--r--fs/btrfs/file-item.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index d9c69e1..45127e4 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -161,7 +161,8 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
while(bio_index < bio->bi_vcnt) {
offset = page_offset(bvec->bv_page) + bvec->bv_offset;
- if (offset >= ordered->file_offset + ordered->len) {
+ if (offset >= ordered->file_offset + ordered->len ||
+ offset < ordered->file_offset) {
unsigned long bytes_left;
sums->len = this_sum_bytes;
this_sum_bytes = 0;
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