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dccp qpolicy: Parameter checking of cmsg qpolicy parameters

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Ensure that cmsg->cmsg_type value is valid for qpolicy
that is currently in use.

Signed-off-by: Tomasz Grobelny <tomasz@grobelny.oswiecenia.net>
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
This commit is contained in:
Tomasz Grobelny
2010-12-04 13:39:13 +01:00
committed by Gerrit Renker
parent 871a2c16c2
commit 0491026507
3 changed files with 22 additions and 6 deletions
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4
net/dccp/proto.c
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@@ -726,6 +726,10 @@ static int dccp_msghdr_parse(struct msghdr *msg, struct sk_buff *skb)
if (cmsg->cmsg_level != SOL_DCCP)
continue;
if (cmsg->cmsg_type <= DCCP_SCM_QPOLICY_MAX &&
!dccp_qpolicy_param_ok(skb->sk, cmsg->cmsg_type))
return -EINVAL;
switch (cmsg->cmsg_type) {
case DCCP_SCM_PRIORITY:
if (cmsg->cmsg_len != CMSG_LEN(sizeof(__u32)))