[ Upstream commit 25933573ef48f3586f559c2cac6c436c62dcf63f ]
Dan reported the following error message:
fs/smb/server/smbacl.c:1296 smb_check_perm_dacl() error: 'posix_acls' dereferencing possible ERR_PTR() fs/smb/server/vfs.c:1323 ksmbd_vfs_make_xattr_posix_acl() error: 'posix_acls' dereferencing possible ERR_PTR() fs/smb/server/vfs.c:1830 ksmbd_vfs_inherit_posix_acl() error: 'acls' dereferencing possible ERR_PTR()
__get_acl() returns a mix of error pointers and NULL. This change it with IS_ERR_OR_NULL().
Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable@vger.kernel.org Reported-by: Dan Carpenter dan.carpenter@linaro.org Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com --- fs/smb/server/smbacl.c | 4 ++-- fs/smb/server/vfs.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/smb/server/smbacl.c b/fs/smb/server/smbacl.c index c24df86eb112..8c041e71cf15 100644 --- a/fs/smb/server/smbacl.c +++ b/fs/smb/server/smbacl.c @@ -1313,7 +1313,7 @@ int smb_check_perm_dacl(struct ksmbd_conn *conn, const struct path *path,
if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { posix_acls = get_acl(d_inode(path->dentry), ACL_TYPE_ACCESS); - if (posix_acls && !found) { + if (!IS_ERR_OR_NULL(posix_acls) && !found) { unsigned int id = -1;
pa_entry = posix_acls->a_entries; @@ -1337,7 +1337,7 @@ int smb_check_perm_dacl(struct ksmbd_conn *conn, const struct path *path, } } } - if (posix_acls) + if (!IS_ERR_OR_NULL(posix_acls)) posix_acl_release(posix_acls); }
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c index ebcd5a312f10..6d171f2757f1 100644 --- a/fs/smb/server/vfs.c +++ b/fs/smb/server/vfs.c @@ -1322,7 +1322,7 @@ static struct xattr_smb_acl *ksmbd_vfs_make_xattr_posix_acl(struct user_namespac return NULL;
posix_acls = get_acl(inode, acl_type); - if (!posix_acls) + if (IS_ERR_OR_NULL(posix_acls)) return NULL;
smb_acl = kzalloc(sizeof(struct xattr_smb_acl) + @@ -1830,7 +1830,7 @@ int ksmbd_vfs_inherit_posix_acl(struct user_namespace *user_ns, return -EOPNOTSUPP;
acls = get_acl(parent_inode, ACL_TYPE_DEFAULT); - if (!acls) + if (IS_ERR_OR_NULL(acls)) return -ENOENT; pace = acls->a_entries;