btrfs: send: use vmalloc only as fallback for clone_sources_tmp

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 5a5d37b..6a8c860 100644 (file)
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -6065,10 +6065,13 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
        alloc_size = arg->clone_sources_count * sizeof(*arg->clone_sources);
 
        if (arg->clone_sources_count) {
-               clone_sources_tmp = vmalloc(alloc_size);
+               clone_sources_tmp = kmalloc(alloc_size, GFP_KERNEL | __GFP_NOWARN);
                if (!clone_sources_tmp) {
-                       ret = -ENOMEM;
-                       goto out;
+                       clone_sources_tmp = vmalloc(alloc_size);
+                       if (!clone_sources_tmp) {
+                               ret = -ENOMEM;
+                               goto out;
+                       }
                }
 
                ret = copy_from_user(clone_sources_tmp, arg->clone_sources,
@@ -6106,7 +6109,7 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
                        sctx->clone_roots[i].root = clone_root;
                        clone_sources_to_rollback = i + 1;
                }
-               vfree(clone_sources_tmp);
+               kvfree(clone_sources_tmp);
                clone_sources_tmp = NULL;
        }
 
@@ -6224,7 +6227,7 @@ out:
                btrfs_root_dec_send_in_progress(sctx->parent_root);
 
        kfree(arg);
-       vfree(clone_sources_tmp);
+       kvfree(clone_sources_tmp);
 
        if (sctx) {
                if (sctx->send_filp)