linux-kernel - [PATCH 5.15 024/667] fs/ntfs3: In function ntfs_set_acl_ex do not change inode->i_mode if called from function ntfs_init

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Date:   Tue,  7 Jun 2022 18:54:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Joe Perches <joe@...ches.com>,
        Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Subject: [PATCH 5.15 024/667] fs/ntfs3: In function ntfs_set_acl_ex do not change inode->i_mode if called from function ntfs_init_acl

From: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>

commit 9186d472ee780fabf74424756c4c00545166157e upstream.

ntfs_init_acl sets mode. ntfs_init_acl calls ntfs_set_acl_ex.
ntfs_set_acl_ex must not change this mode.
Fixes xfstest generic/444
Fixes: be71b5cba2e6 ("fs/ntfs3: Add attrib operations")

Reviewed-by: Joe Perches <joe@...ches.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/ntfs3/xattr.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- a/fs/ntfs3/xattr.c
+++ b/fs/ntfs3/xattr.c
@@ -541,7 +541,7 @@ struct posix_acl *ntfs_get_acl(struct in
 
 static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
 				    struct inode *inode, struct posix_acl *acl,
-				    int type)
+				    int type, bool init_acl)
 {
 	const char *name;
 	size_t size, name_len;
@@ -554,8 +554,9 @@ static noinline int ntfs_set_acl_ex(stru
 
 	switch (type) {
 	case ACL_TYPE_ACCESS:
-		if (acl) {
-			umode_t mode = inode->i_mode;
+		/* Do not change i_mode if we are in init_acl */
+		if (acl && !init_acl) {
+			umode_t mode;
 
 			err = posix_acl_update_mode(mnt_userns, inode, &mode,
 						    &acl);
@@ -616,7 +617,7 @@ out:
 int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
 		 struct posix_acl *acl, int type)
 {
-	return ntfs_set_acl_ex(mnt_userns, inode, acl, type);
+	return ntfs_set_acl_ex(mnt_userns, inode, acl, type, false);
 }
 
 /*
@@ -636,7 +637,7 @@ int ntfs_init_acl(struct user_namespace
 
 	if (default_acl) {
 		err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
-				      ACL_TYPE_DEFAULT);
+				      ACL_TYPE_DEFAULT, true);
 		posix_acl_release(default_acl);
 	} else {
 		inode->i_default_acl = NULL;
@@ -647,7 +648,7 @@ int ntfs_init_acl(struct user_namespace
 	else {
 		if (!err)
 			err = ntfs_set_acl_ex(mnt_userns, inode, acl,
-					      ACL_TYPE_ACCESS);
+					      ACL_TYPE_ACCESS, true);
 		posix_acl_release(acl);
 	}