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dccp sizeof correction

PATCH In review Hagen Paul Pfeifer 2 participants 2 messages Nov 22, 2005 Networking

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Hagen Paul Pfeifer

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#0 lore raw

PATCH 1/1 dccp sizeof correction

Setsockopt in DCCP make the assumption that sizeof(int) is the same as sizeof(u32), that isn't correct at all. ;)

best regards

HGN

Signed-off-by Hagen Paul Pfeifer <[email protected]>
 net/dccp/proto.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

applies-to: 69ebfee77c8a174c87ea8ed31e023c94b09a9d6e d24574ecf034d259882a6de16d27aff60c009c8d

net/dccp/proto.c +1 -1
index a021c34..a1be808 100644
@@ -256,7 +256,7 @@ int dccp_setsockopt(struct sock *sk, int
 	if (level != SOL_DCCP)
 		return ip_setsockopt(sk, level, optname, optval, optlen);
 
-	if (optlen < sizeof(int))
+	if (optlen < sizeof(u32))
 		return -EINVAL;
 
 	if (get_user(val, (int __user *)optval))

---
0.99.9g

#1 lore raw

In article <[email protected]> (at Tue, 22 Nov 2005 11:51:31 +0100), Hagen Paul Pfeifer <[email protected]> says:

Quoted 2 lines

Setsockopt in DCCP make the assumption that sizeof(int) is the same as sizeof(u32), that isn't correct at all. ;)

The patch is not correct.
I think we should use int for DCCP_SOCKOPT_SERVICE.

Signed-off-by YOSHIFUJI Hideaki <[email protected]>
net/dccp/proto.c +13 -6
index 8a6b2a9..f4299db 100644
@@ -211,14 +211,21 @@ int dccp_ioctl(struct sock *sk, int cmd,
 	return -ENOIOCTLCMD;
 }
 
-static int dccp_setsockopt_service(struct sock *sk, const u32 service,
+static int dccp_setsockopt_service(struct sock *sk,
 				   char __user *optval, int optlen)
 {
+	u32 service;
 	struct dccp_sock *dp = dccp_sk(sk);
 	struct dccp_service_list *sl = NULL;
 
-	if (service == DCCP_SERVICE_INVALID_VALUE || 
-	    optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32))
+	if (optlen < sizeof(u32) ||
+	    optlen > DCCP_SERCICE_LISR_MAX_LEN * sizeof(u32))
+		return -EINVAL;
+
+	if (get_user(service, (u32 __user *)optval))
+		return -EFAULT;
+
+	if (service == DCCP_SERVICE_INVALID_VALUE)
 		return -EINVAL;
 
 	if (optlen > sizeof(service)) {

@@ -256,14 +263,14 @@ int dccp_setsockopt(struct sock *sk, int
 	if (level != SOL_DCCP)
 		return ip_setsockopt(sk, level, optname, optval, optlen);
 
+	if (optname == DCCP_SOCKOPT_SERVICE)
+		return dccp_setsockopt_service(sk, optval, optlen);
+
 	if (optlen < sizeof(int))
 		return -EINVAL;
 
 	if (get_user(val, (int __user *)optval))
 		return -EFAULT;
-
-	if (optname == DCCP_SOCKOPT_SERVICE)
-		return dccp_setsockopt_service(sk, val, optval, optlen);
 
 	lock_sock(sk);
 	dp = dccp_sk(sk);
Signature · 2 lines
YOSHIFUJI Hideaki @ USAGI Project  <[email protected]>
GPG-FP  : 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA