linux-kernel - [PATCH 1/4] fs/ntfs3: In function ntfs_set_acl_ex do not change inode->i_mode if called from function ntfs_init

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <67d0c9ca-2531-8a8a-ea0b-270dc921e271@paragon-software.com>
Date:   Mon, 25 Oct 2021 19:58:26 +0300
From:   Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To:     <ntfs3@...ts.linux.dev>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>
Subject: [PATCH 1/4] fs/ntfs3: In function ntfs_set_acl_ex do not change
 inode->i_mode if called from function ntfs_init_acl

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: 83e8f5032e2d ("fs/ntfs3: Add attrib operations")

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
 fs/ntfs3/xattr.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
index 2143099cffdf..97b5f8417d85 100644
--- a/fs/ntfs3/xattr.c
+++ b/fs/ntfs3/xattr.c
@@ -538,7 +538,7 @@ struct posix_acl *ntfs_get_acl(struct inode *inode, int type)
 
 static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
 				    struct inode *inode, struct posix_acl *acl,
-				    int type)
+				    int type, int init_acl)
 {
 	const char *name;
 	size_t size, name_len;
@@ -551,8 +551,9 @@ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
 
 	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);
@@ -613,7 +614,7 @@ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
 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, 0);
 }
 
 /*
@@ -633,7 +634,7 @@ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
 
 	if (default_acl) {
 		err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
-				      ACL_TYPE_DEFAULT);
+				      ACL_TYPE_DEFAULT, 1);
 		posix_acl_release(default_acl);
 	} else {
 		inode->i_default_acl = NULL;
@@ -644,7 +645,7 @@ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
 	else {
 		if (!err)
 			err = ntfs_set_acl_ex(mnt_userns, inode, acl,
-					      ACL_TYPE_ACCESS);
+					      ACL_TYPE_ACCESS, 1);
 		posix_acl_release(acl);
 	}
 
-- 
2.33.0