linux-kernel - [PATCH 6.7 330/713] SUNRPC: fix some memleaks in gssx_dec_option

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

Date: Sun, 24 Mar 2024 18:40:56 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Zhipeng Lu <alexious@....edu.cn>,
	Chuck Lever <chuck.lever@...cle.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.7 330/713] SUNRPC: fix some memleaks in gssx_dec_option_array

From: Zhipeng Lu <alexious@....edu.cn>

[ Upstream commit 3cfcfc102a5e57b021b786a755a38935e357797d ]

The creds and oa->data need to be freed in the error-handling paths after
their allocation. So this patch add these deallocations in the
corresponding paths.

Fixes: 1d658336b05f ("SUNRPC: Add RPC based upcall mechanism for RPCGSS auth")
Signed-off-by: Zhipeng Lu <alexious@....edu.cn>
Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/sunrpc/auth_gss/gss_rpc_xdr.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/net/sunrpc/auth_gss/gss_rpc_xdr.c b/net/sunrpc/auth_gss/gss_rpc_xdr.c
index d79f12c2550ac..cb32ab9a83952 100644
--- a/net/sunrpc/auth_gss/gss_rpc_xdr.c
+++ b/net/sunrpc/auth_gss/gss_rpc_xdr.c
@@ -250,8 +250,8 @@ static int gssx_dec_option_array(struct xdr_stream *xdr,
 
 	creds = kzalloc(sizeof(struct svc_cred), GFP_KERNEL);
 	if (!creds) {
-		kfree(oa->data);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto free_oa;
 	}
 
 	oa->data[0].option.data = CREDS_VALUE;
@@ -265,29 +265,40 @@ static int gssx_dec_option_array(struct xdr_stream *xdr,
 
 		/* option buffer */
 		p = xdr_inline_decode(xdr, 4);
-		if (unlikely(p == NULL))
-			return -ENOSPC;
+		if (unlikely(p == NULL)) {
+			err = -ENOSPC;
+			goto free_creds;
+		}
 
 		length = be32_to_cpup(p);
 		p = xdr_inline_decode(xdr, length);
-		if (unlikely(p == NULL))
-			return -ENOSPC;
+		if (unlikely(p == NULL)) {
+			err = -ENOSPC;
+			goto free_creds;
+		}
 
 		if (length == sizeof(CREDS_VALUE) &&
 		    memcmp(p, CREDS_VALUE, sizeof(CREDS_VALUE)) == 0) {
 			/* We have creds here. parse them */
 			err = gssx_dec_linux_creds(xdr, creds);
 			if (err)
-				return err;
+				goto free_creds;
 			oa->data[0].value.len = 1; /* presence */
 		} else {
 			/* consume uninteresting buffer */
 			err = gssx_dec_buffer(xdr, &dummy);
 			if (err)
-				return err;
+				goto free_creds;
 		}
 	}
 	return 0;
+
+free_creds:
+	kfree(creds);
+free_oa:
+	kfree(oa->data);
+	oa->data = NULL;
+	return err;
 }
 
 static int gssx_dec_status(struct xdr_stream *xdr,
-- 
2.43.0