X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fxattr.c;h=bcc2156d4d2873d0c3a7b0841a4cdaf1fa456e22;hb=f3f6ec4b77f627a6427460d6f8884e1042eef134;hp=3f9c64bea151fd7c6df4297e8bfa01b626a02bd5;hpb=fac84ef26759a3725bfc53ae3abf21976360aff3;p=linux-2.6

diff --git a/fs/xattr.c b/fs/xattr.c
index 3f9c64bea1..bcc2156d4d 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -74,8 +74,7 @@ setxattr(struct dentry *d, char __user *name, void __user *value,
 	}
 out:
 	up(&d->d_inode->i_sem);
-	if (kvalue)
-		kfree(kvalue);
+	kfree(kvalue);
 	return error;
 }
 
@@ -143,7 +142,7 @@ getxattr(struct dentry *d, char __user *name, void __user *value, size_t size)
 	if (size) {
 		if (size > XATTR_SIZE_MAX)
 			size = XATTR_SIZE_MAX;
-		kvalue = kmalloc(size, GFP_KERNEL);
+		kvalue = kzalloc(size, GFP_KERNEL);
 		if (!kvalue)
 			return -ENOMEM;
 	}
@@ -154,11 +153,15 @@ getxattr(struct dentry *d, char __user *name, void __user *value, size_t size)
 	error = -EOPNOTSUPP;
 	if (d->d_inode->i_op && d->d_inode->i_op->getxattr)
 		error = d->d_inode->i_op->getxattr(d, kname, kvalue, size);
-	else if (!strncmp(kname, XATTR_SECURITY_PREFIX,
-			  sizeof XATTR_SECURITY_PREFIX - 1)) {
+
+	if (!strncmp(kname, XATTR_SECURITY_PREFIX,
+		     sizeof XATTR_SECURITY_PREFIX - 1)) {
 		const char *suffix = kname + sizeof XATTR_SECURITY_PREFIX - 1;
-		error = security_inode_getsecurity(d->d_inode, suffix, kvalue,
-						   size);
+		int rv = security_inode_getsecurity(d->d_inode, suffix, kvalue,
+						    size, error);
+		/* Security module active: overwrite error value */
+		if (rv != -EOPNOTSUPP)
+			error = rv;
 	}
 	if (error > 0) {
 		if (size && copy_to_user(value, kvalue, error))
@@ -169,8 +172,7 @@ getxattr(struct dentry *d, char __user *name, void __user *value, size_t size)
 		error = -E2BIG;
 	}
 out:
-	if (kvalue)
-		kfree(kvalue);
+	kfree(kvalue);
 	return error;
 }
 
@@ -243,7 +245,7 @@ listxattr(struct dentry *d, char __user *list, size_t size)
 		error = d->d_inode->i_op->listxattr(d, klist, size);
 	} else {
 		error = security_inode_listsecurity(d->d_inode, klist, size);
-		if (size && error >= size)
+		if (size && error > size)
 			error = -ERANGE;
 	}
 	if (error > 0) {
@@ -255,8 +257,7 @@ listxattr(struct dentry *d, char __user *list, size_t size)
 		error = -E2BIG;
 	}
 out:
-	if (klist)
-		kfree(klist);
+	kfree(klist);
 	return error;
 }