linux-kernel - [PATCH] ksmbd: remove redundant DACL check in smb_check_perm

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-next>] [day] [month] [year] [list]

Message-ID: <20251210135149.10837-1-a.velichayshiy@ispras.ru>
Date: Wed, 10 Dec 2025 16:51:33 +0300
From: Alexey Velichayshiy <a.velichayshiy@...ras.ru>
To: a.velichayshiy@...ras.ru,
	Namjae Jeon <linkinjeon@...nel.org>
Cc: Steve French <smfrench@...il.com>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Tom Talpey <tom@...pey.com>,
	linux-cifs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	lvc-project@...uxtesting.org
Subject: [PATCH] ksmbd: remove redundant DACL check in smb_check_perm_dacl

A zero value of pdacl->num_aces is already handled at the start of
smb_check_perm_dacl() so the second check is useless.

Drop the unreachable code block, no functional impact intended.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Alexey Velichayshiy <a.velichayshiy@...ras.ru>
---
 fs/smb/server/smbacl.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/smb/server/smbacl.c b/fs/smb/server/smbacl.c
index 5aa7a66334d9..05598d994a68 100644
--- a/fs/smb/server/smbacl.c
+++ b/fs/smb/server/smbacl.c
@@ -1307,9 +1307,6 @@ int smb_check_perm_dacl(struct ksmbd_conn *conn, const struct path *path,
 			granted |= le32_to_cpu(ace->access_req);
 			ace = (struct smb_ace *)((char *)ace + le16_to_cpu(ace->size));
 		}
-
-		if (!pdacl->num_aces)
-			granted = GENERIC_ALL_FLAGS;
 	}
 
 	if (!uid)
-- 
2.43.0