[PATCH] ksmbd: remove redundant DACL check in smb_check_perm_dacl

Alexey Velichayshiy posted 1 patch 3 days, 12 hours ago
fs/smb/server/smbacl.c | 3 ---
1 file changed, 3 deletions(-)
[PATCH] ksmbd: remove redundant DACL check in smb_check_perm_dacl
Posted by Alexey Velichayshiy 3 days, 12 hours ago
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@ispras.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
Re: [PATCH] ksmbd: remove redundant DACL check in smb_check_perm_dacl
Posted by Namjae Jeon 3 days ago
On Wed, Dec 10, 2025 at 10:52 PM Alexey Velichayshiy
<a.velichayshiy@ispras.ru> wrote:
>
> 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@ispras.ru>
Applied it to #ksmbd-for-next-next.
Thanks!