Subject: Re: linux-next: manual merge of the f2fs tree with the fscrypt tree

From: Stephen Rothwell <[email-masked]>
Date: Wed, 2 Jan 2019 11:26:10 +1100

Hi all,

On Tue, 11 Dec 2018 10:13:22 +1100 Stephen Rothwell <[email-masked]> wrote:
>
> Today's linux-next merge of the f2fs tree got a conflict in:
> 
>   fs/f2fs/dir.c
> 
> between commit:
> 
>   848a010287e6 ("f2fs: use IS_ENCRYPTED() to check encryption status")
> 
> from the fscrypt tree and commit:
> 
>   4e240d1bab1e ("f2fs: check memory boundary by insane namelen")
> 
> from the f2fs tree.
> 
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging.  You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
> 
> -- 
> Cheers,
> Stephen Rothwell
> 
> diff --cc fs/f2fs/dir.c
> index cf9e2564388d,c0c845da12fa..000000000000
> --- a/fs/f2fs/dir.c
> +++ b/fs/f2fs/dir.c
> @@@ -808,7 -808,18 +808,18 @@@ int f2fs_fill_dentries(struct dir_conte
>   		de_name.name = d->filename[bit_pos];
>   		de_name.len = le16_to_cpu(de->name_len);
>   
> + 		/* check memory boundary before moving forward */
> + 		bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
> + 		if (unlikely(bit_pos > d->max)) {
> + 			f2fs_msg(sbi->sb, KERN_WARNING,
> + 				"%s: corrupted namelen=%d, run fsck to fix.",
> + 				__func__, le16_to_cpu(de->name_len));
> + 			set_sbi_flag(sbi, SBI_NEED_FSCK);
> + 			err = -EINVAL;
> + 			goto out;
> + 		}
> + 
>  -		if (f2fs_encrypted_inode(d->inode)) {
>  +		if (IS_ENCRYPTED(d->inode)) {
>   			int save_len = fstr->len;
>   
>   			err = fscrypt_fname_disk_to_usr(d->inode,

This is now a conflict between the fscrypt tree and Linus' tree.

-- 
Cheers,
Stephen Rothwell