linux-cifs.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Namjae Jeon <linkinjeon@kernel.org>
To: linux-cifs@vger.kernel.org
Cc: Namjae Jeon <linkinjeon@kernel.org>
Subject: [PATCH 2/2] ksmbd: fix control flow issues in sid_to_id()
Date: Tue,  7 Sep 2021 09:06:26 +0900	[thread overview]
Message-ID: <20210907000626.14385-2-linkinjeon@kernel.org> (raw)
In-Reply-To: <20210907000626.14385-1-linkinjeon@kernel.org>

Addresses-Coverity reported Control flow issues in sid_to_id()
/fs/ksmbd/smbacl.c: 277 in sid_to_id()
271
272	if (sidtype == SIDOWNER) {
273		kuid_t uid;
274		uid_t id;
275
276		id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]);
>>>	CID 1506810:  Control flow issues  (NO_EFFECT)
>>>	This greater-than-or-equal-to-zero comparison of an unsigned value
>>>	is always true. "id >= 0U".
277		if (id >= 0) {
278			/*
279			 * Translate raw sid into kuid in the server's user
280			 * namespace.
281			 */
282			uid = make_kuid(&init_user_ns, id);

Addresses-Coverity: ("Control flow issues")
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
---
 fs/ksmbd/smbacl.c | 48 ++++++++++++++++++++++-------------------------
 1 file changed, 22 insertions(+), 26 deletions(-)

diff --git a/fs/ksmbd/smbacl.c b/fs/ksmbd/smbacl.c
index 16da99a9963c..0a95cdec8c80 100644
--- a/fs/ksmbd/smbacl.c
+++ b/fs/ksmbd/smbacl.c
@@ -274,38 +274,34 @@ static int sid_to_id(struct user_namespace *user_ns,
 		uid_t id;
 
 		id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]);
-		if (id >= 0) {
-			/*
-			 * Translate raw sid into kuid in the server's user
-			 * namespace.
-			 */
-			uid = make_kuid(&init_user_ns, id);
-
-			/* If this is an idmapped mount, apply the idmapping. */
-			uid = kuid_from_mnt(user_ns, uid);
-			if (uid_valid(uid)) {
-				fattr->cf_uid = uid;
-				rc = 0;
-			}
+		/*
+		 * Translate raw sid into kuid in the server's user
+		 * namespace.
+		 */
+		uid = make_kuid(&init_user_ns, id);
+
+		/* If this is an idmapped mount, apply the idmapping. */
+		uid = kuid_from_mnt(user_ns, uid);
+		if (uid_valid(uid)) {
+			fattr->cf_uid = uid;
+			rc = 0;
 		}
 	} else {
 		kgid_t gid;
 		gid_t id;
 
 		id = le32_to_cpu(psid->sub_auth[psid->num_subauth - 1]);
-		if (id >= 0) {
-			/*
-			 * Translate raw sid into kgid in the server's user
-			 * namespace.
-			 */
-			gid = make_kgid(&init_user_ns, id);
-
-			/* If this is an idmapped mount, apply the idmapping. */
-			gid = kgid_from_mnt(user_ns, gid);
-			if (gid_valid(gid)) {
-				fattr->cf_gid = gid;
-				rc = 0;
-			}
+		/*
+		 * Translate raw sid into kgid in the server's user
+		 * namespace.
+		 */
+		gid = make_kgid(&init_user_ns, id);
+
+		/* If this is an idmapped mount, apply the idmapping. */
+		gid = kgid_from_mnt(user_ns, gid);
+		if (gid_valid(gid)) {
+			fattr->cf_gid = gid;
+			rc = 0;
 		}
 	}
 
-- 
2.25.1


      reply	other threads:[~2021-09-07  0:07 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-07  0:06 [PATCH 1/2] ksmbd: fix read of uninitialized variable ret in set_file_basic_info Namjae Jeon
2021-09-07  0:06 ` Namjae Jeon [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210907000626.14385-2-linkinjeon@kernel.org \
    --to=linkinjeon@kernel.org \
    --cc=linux-cifs@vger.kernel.org \
    --subject='Re: [PATCH 2/2] ksmbd: fix control flow issues in sid_to_id()' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).