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smb/client: fix chown/chgrp with SMB3 POSIX Extensions

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Ownership (chown) and group (chgrp) modifications were being ignored when
mounting with SMB3 POSIX Extensions unless CIFS_MOUNT_CIFS_ACL or
CIFS_MOUNT_MODE_FROM_SID were also explicitly set.

Fix this by checking for posix_extensions in cifs_setattr_nounix() when
updating UID and GID, ensuring that id_mode_to_cifs_acl() is called to map
and set the ownership/group information on the server.

Cc: stable@vger.kernel.org
Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ralph Boehme 2026-06-07 15:23:18 +02:00 committed by Steve French
parent 4939889c98
commit 760ef2c579
1 changed files with 2 additions and 1 deletions
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3
fs/smb/client/inode.c
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@ -3376,7 +3376,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
if (attrs->ia_valid & ATTR_GID)
gid = attrs->ia_gid;
if (sbflags & (CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_MODE_FROM_SID)) {
if ((sbflags & (CIFS_MOUNT_CIFS_ACL | CIFS_MOUNT_MODE_FROM_SID)) ||
cifs_sb_master_tcon(cifs_sb)->posix_extensions) {
if (uid_valid(uid) || gid_valid(gid)) {
mode = NO_CHANGE_64;
rc = id_mode_to_cifs_acl(inode, full_path, &mode,