btrfs: send: use vmalloc only as fallback for clone_sources_tmp (2f91306a) · Commits · e / devices / android_kernel_oneplus_sm8150

fs/btrfs/send.c

+8 −5

Original line number	Diff line number	Diff line
		@@ -6065,11 +6065,14 @@ 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 = kmalloc(alloc_size, GFP_KERNEL \| __GFP_NOWARN);
		if (!clone_sources_tmp) {
		clone_sources_tmp = vmalloc(alloc_size);
		if (!clone_sources_tmp) {
		ret = -ENOMEM;
		goto out;
		}
		}

		ret = copy_from_user(clone_sources_tmp, arg->clone_sources,
		alloc_size);
		@@ -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 @@ long btrfs_ioctl_send(struct file mnt_file, void __user arg_)
		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)