Messages in this thread Patch in this message | | | Date | Tue, 22 Nov 2005 19:09:30 +0900 (JST) | Subject | Re: [PATCH] dccp sizeof correction | From | YOSHIFUJI Hideaki / 吉藤英明 <> |
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In article <20051122105130.GA25078@0xdef.net> (at Tue, 22 Nov 2005 11:51:31 +0100), Hagen Paul Pfeifer <hpplinuxml@0xdef.net> says:
> 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 <yoshfuji@linux-ipv6.org>
diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 8a6b2a9..f4299db 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -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); -- YOSHIFUJI Hideaki @ USAGI Project <yoshfuji@linux-ipv6.org> GPG-FP : 9022 65EB 1ECF 3AD1 0BDF 80D8 4807 F894 E062 0EEA - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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