author: Miklos Szeredi <mszeredi@redhat.com> 2020-12-14 15:26:13 +0100
committer: Miklos Szeredi <mszeredi@redhat.com> 2020-12-14 15:26:13 +0100
commit: 3078d85c9a1099405a0463c4d112ba97ee5bd217
parent: 7c03e2cda4a584cadc398e8f6641ca9988a39d52
Commit Summary:
Diffstat:
1 file changed, 9 insertions, 1 deletion
diff --git a/fs/remap_range.c b/fs/remap_range.c
index e6099beefa97..77dba3a49e65 100644
--- a/fs/remap_range.c
+++ b/fs/remap_range.c
@@ -456,8 +456,16 @@ loff_t vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
if (ret)
return ret;
+ /*
+ * This is redundant if called from vfs_dedupe_file_range(), but other
+ * callers need it and it's not performance sesitive...
+ */
+ ret = remap_verify_area(src_file, src_pos, len, false);
+ if (ret)
+ goto out_drop_write;
+
ret = remap_verify_area(dst_file, dst_pos, len, true);
- if (ret < 0)
+ if (ret)
goto out_drop_write;
ret = -EPERM;