Merge tag 'for-linus-6.18-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux

Pull orangefs updates from Mike Marshall:
 "Two cleanups and a bug fix:

   - Remove unused type in macro fill_default_sys_attrs (Zhen Ni)

   - Replace kzalloc + copy_from_user with memdup_user_nul (Thorsten Blum)

   - Fix xattr related buffer overflow...

     A message was forwarded to me from Disclosure <[email protected]>
     indicating a problem with a loop condition in our xattr code. When
     I fixed the problem it exposed a related memory leak problem, and I
     fixed that too"

* tag 'for-linus-6.18-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  fs/orangefs: Replace kzalloc + copy_from_user with memdup_user_nul
  orangefs: fix xattr related buffer overflow...
  orangefs: Remove unused type in macro fill_default_sys_attrs

Author: torvalds

fs/orangefs/namei.c

@@ -38,8 +38,7 @@ static int orangefs_create(struct mnt_idmap *idmap,
 
 	new_op->upcall.req.create.parent_refn = parent->refn;
 
-	fill_default_sys_attrs(new_op->upcall.req.create.attributes,
-			       ORANGEFS_TYPE_METAFILE, mode);
+	fill_default_sys_attrs(new_op->upcall.req.create.attributes, mode);
 
 	strscpy(new_op->upcall.req.create.d_name, dentry->d_name.name);
 
@@ -240,9 +239,7 @@ static int orangefs_symlink(struct mnt_idmap *idmap,
 
 	new_op->upcall.req.sym.parent_refn = parent->refn;
 
-	fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
-			       ORANGEFS_TYPE_SYMLINK,
-			       mode);
+	fill_default_sys_attrs(new_op->upcall.req.sym.attributes, mode);
 
 	strscpy(new_op->upcall.req.sym.entry_name, dentry->d_name.name);
 	strscpy(new_op->upcall.req.sym.target, symname);
@@ -316,8 +313,7 @@ static struct dentry *orangefs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
 
 	new_op->upcall.req.mkdir.parent_refn = parent->refn;
 
-	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
-			      ORANGEFS_TYPE_DIRECTORY, mode);
+	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes, mode);
 
 	strscpy(new_op->upcall.req.mkdir.d_name, dentry->d_name.name);
 

fs/orangefs/orangefs-debugfs.c

@@ -440,14 +440,13 @@ static ssize_t orangefs_debug_write(struct file *file,
 		count = ORANGEFS_MAX_DEBUG_STRING_LEN;
 	}
 
-	buf = kzalloc(ORANGEFS_MAX_DEBUG_STRING_LEN, GFP_KERNEL);
-	if (!buf)
-		goto out;
-
-	if (copy_from_user(buf, ubuf, count - 1)) {
+	buf = memdup_user_nul(ubuf, count - 1);
+	if (IS_ERR(buf)) {
 		gossip_debug(GOSSIP_DEBUGFS_DEBUG,
-			     "%s: copy_from_user failed!\n",
+			     "%s: memdup_user_nul failed!\n",
 			     __func__);
+		rc = PTR_ERR(buf);
+		buf = NULL;
 		goto out;
 	}
 

fs/orangefs/orangefs-kernel.h

@@ -462,7 +462,7 @@ int service_operation(struct orangefs_kernel_op_s *op,
 	((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
 		ORANGEFS_OP_INTERRUPTIBLE : 0)
 
-#define fill_default_sys_attrs(sys_attr, type, mode)			\
+#define fill_default_sys_attrs(sys_attr, mode)			\
 do {									\
 	sys_attr.owner = from_kuid(&init_user_ns, current_fsuid()); \
 	sys_attr.group = from_kgid(&init_user_ns, current_fsgid()); \

fs/orangefs/xattr.c

@@ -54,7 +54,9 @@ static inline int convert_to_internal_xattr_flags(int setxattr_flags)
 static unsigned int xattr_key(const char *key)
 {
 	unsigned int i = 0;
-	while (key)
+	if (!key)
+		return 0;
+	while (*key)
 		i += *key++;
 	return i % 16;
 }
@@ -175,8 +177,8 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
 				cx->length = -1;
 				cx->timeout = jiffies +
 				    orangefs_getattr_timeout_msecs*HZ/1000;
-				hash_add(orangefs_inode->xattr_cache, &cx->node,
-				    xattr_key(cx->key));
+				hlist_add_head( &cx->node,
+                                   &orangefs_inode->xattr_cache[xattr_key(cx->key)]);
 			}
 		}
 		goto out_release_op;
@@ -229,8 +231,8 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
 			memcpy(cx->val, buffer, length);
 			cx->length = length;
 			cx->timeout = jiffies + HZ;
-			hash_add(orangefs_inode->xattr_cache, &cx->node,
-			    xattr_key(cx->key));
+			hlist_add_head(&cx->node,
+				&orangefs_inode->xattr_cache[xattr_key(cx->key)]);
 		}
 	}