netdev - [PATCH 20/51] sctp: pass a kernel pointer to sctp_setsockopt_adaptation

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]

Message-Id: <20200719072228.112645-21-hch@lst.de>
Date:   Sun, 19 Jul 2020 09:21:57 +0200
From:   Christoph Hellwig <hch@....de>
To:     Vlad Yasevich <vyasevich@...il.com>,
        Neil Horman <nhorman@...driver.com>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        David Laight <David.Laight@...LAB.COM>,
        linux-sctp@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 20/51] sctp: pass a kernel pointer to sctp_setsockopt_adaptation_layer

Use the kernel pointer that sctp_setsockopt has available instead of
directly handling the user pointer.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 net/sctp/socket.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index cc7d5430ad8858..b29452f58ff988 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3336,17 +3336,14 @@ static int sctp_setsockopt_peer_primary_addr(struct sock *sk,
 	return err;
 }
 
-static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval,
+static int sctp_setsockopt_adaptation_layer(struct sock *sk,
+					    struct sctp_setadaptation *adapt,
 					    unsigned int optlen)
 {
-	struct sctp_setadaptation adaptation;
-
 	if (optlen != sizeof(struct sctp_setadaptation))
 		return -EINVAL;
-	if (copy_from_user(&adaptation, optval, optlen))
-		return -EFAULT;
 
-	sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind;
+	sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind;
 
 	return 0;
 }
@@ -4700,7 +4697,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
 		retval = sctp_setsockopt_maxseg(sk, kopt, optlen);
 		break;
 	case SCTP_ADAPTATION_LAYER:
-		retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen);
+		retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen);
 		break;
 	case SCTP_CONTEXT:
 		retval = sctp_setsockopt_context(sk, optval, optlen);
-- 
2.27.0