[PATCH v3 1/3] KEYS: Expand key->{datalen,quotalen} to unsigned int

[Jarkko Sakkinen]

On Tue, Oct 20, 2026 at 03:47:14PM +0000, Eric Biggers wrote:
> On Tue, Oct 20, 2026 at 04:38:55AM +0300, Jarkko Sakkinen wrote:
> > diff --git a/include/linux/key.h b/include/linux/key.h
> > index e40b5267658f..26139c3adf62 100644
> > --- a/include/linux/key.h
> > +++ b/include/linux/key.h
> > @@ -216,8 +216,8 @@ struct key {
> >  	kuid_t			uid;
> >  	kgid_t			gid;
> >  	key_perm_t		perm;		/* access permissions */
> > -	unsigned short		quotalen;	/* length added to quota */
> > -	unsigned short		datalen;	/* payload data length
> > +	unsigned int		quotalen;	/* length added to quota */
> > +	unsigned int		datalen;	/* payload data length
> >  						 * - may not match RCU dereferenced payload
> >  						 * - payload should contain own length
> >  						 */
> 
> fs/smb/client/cifsacl.c contains some debug logging that prints
> key::datalen using the %hu format specifier.  Those need to be updated
> to %u to match the new type.

Ugh, my mistake i.e., we are talking about:

diff --git a/fs/smb/client/cifsacl.c b/fs/smb/client/cifsacl.c
index c5e47a835f99..de2acc7234be 100644
--- a/fs/smb/client/cifsacl.c
+++ b/fs/smb/client/cifsacl.c
@@ -385,7 +385,7 @@ id_to_sid(unsigned int cid, uint sidtype, struct smb_sid *ssid)
 		goto out_revert_creds;
 	} else if (sidkey->datalen < CIFS_SID_BASE_SIZE) {
 		rc = smb_EIO1(smb_eio_trace_malformed_sid_key, sidkey->datalen);
-		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n",
+		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%u)\n",
 			 __func__, sidkey->datalen);
 		goto invalidate_key;
 	}
@@ -403,7 +403,7 @@ id_to_sid(unsigned int cid, uint sidtype, struct smb_sid *ssid)
 	if (ksid_size > sidkey->datalen) {
 		rc = smb_EIO2(smb_eio_trace_malformed_ksid_key,
 			      ksid_size, sidkey->datalen);
-		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu, ksid_size=%u)\n",
+		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%u, ksid_size=%u)\n",
 			 __func__, sidkey->datalen, ksid_size);
 		goto invalidate_key;
 	}
@@ -498,7 +498,7 @@ sid_to_id(struct cifs_sb_info *cifs_sb, struct smb_sid *psid,
 	 */
 	BUILD_BUG_ON(sizeof(uid_t) != sizeof(gid_t));
 	if (sidkey->datalen != sizeof(uid_t)) {
-		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n",
+		cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%u)\n",
 			 __func__, sidkey->datalen);
 		key_invalidate(sidkey);
 		goto out_key_put;

I'll include this as part of the patch exactly.

> 
> - Eric

Br, Jarkko