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author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-23 16:49:31 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-23 16:49:31 -0700 |
commit | a4c12d6c5dde48c69464baf7c703e425ee511433 (patch) | |
tree | 73c375e41a353e2da0461ff30d744bff73958b08 /net/netlink/attr.c | |
parent | 73af07de3e32b9ac328c3d1417258bb98a9b0a9b (diff) | |
parent | 3b9f9a1c3903b64c38505f9fed3bb11e48dbc931 (diff) | |
download | kernel_samsung_smdk4412-a4c12d6c5dde48c69464baf7c703e425ee511433.zip kernel_samsung_smdk4412-a4c12d6c5dde48c69464baf7c703e425ee511433.tar.gz kernel_samsung_smdk4412-a4c12d6c5dde48c69464baf7c703e425ee511433.tar.bz2 |
Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (353 commits)
[IPV6] ADDRCONF: Mobile IPv6 Home Address support.
[IPV6] ADDRCONF: Allow non-DAD'able addresses.
[IPV6] NDISC: Fix is_router flag setting.
[IPV6] ADDRCONF: Convert addrconf_lock to RCU.
[IPV6] NDISC: Add proxy_ndp sysctl.
[IPV6] NDISC: Set per-entry is_router flag in Proxy NA.
[IPV6] NDISC: Avoid updating neighbor cache for proxied address in receiving NA.
[IPV6]: Don't forward packets to proxied link-local address.
[IPV6] NDISC: Handle NDP messages to proxied addresses.
[NETFILTER]: PPTP conntrack: fix another GRE keymap leak
[NETFILTER]: PPTP conntrack: fix GRE keymap leak
[NETFILTER]: PPTP conntrack: fix PPTP_IN_CALL message types
[NETFILTER]: PPTP conntrack: check call ID before changing state
[NETFILTER]: PPTP conntrack: clean up debugging cruft
[NETFILTER]: PPTP conntrack: consolidate header parsing
[NETFILTER]: PPTP conntrack: consolidate header size checks
[NETFILTER]: PPTP conntrack: simplify expectation handling
[NETFILTER]: PPTP conntrack: remove unnecessary cid/pcid header pointers
[NETFILTER]: PPTP conntrack: fix header definitions
[NETFILTER]: PPTP conntrack: remove more dead code
...
Diffstat (limited to 'net/netlink/attr.c')
-rw-r--r-- | net/netlink/attr.c | 124 |
1 files changed, 114 insertions, 10 deletions
diff --git a/net/netlink/attr.c b/net/netlink/attr.c index dddbd15..0041395 100644 --- a/net/netlink/attr.c +++ b/net/netlink/attr.c @@ -20,7 +20,6 @@ static u16 nla_attr_minlen[NLA_TYPE_MAX+1] __read_mostly = { [NLA_U16] = sizeof(u16), [NLA_U32] = sizeof(u32), [NLA_U64] = sizeof(u64), - [NLA_STRING] = 1, [NLA_NESTED] = NLA_HDRLEN, }; @@ -28,7 +27,7 @@ static int validate_nla(struct nlattr *nla, int maxtype, struct nla_policy *policy) { struct nla_policy *pt; - int minlen = 0; + int minlen = 0, attrlen = nla_len(nla); if (nla->nla_type <= 0 || nla->nla_type > maxtype) return 0; @@ -37,16 +36,46 @@ static int validate_nla(struct nlattr *nla, int maxtype, BUG_ON(pt->type > NLA_TYPE_MAX); - if (pt->minlen) - minlen = pt->minlen; - else if (pt->type != NLA_UNSPEC) - minlen = nla_attr_minlen[pt->type]; + switch (pt->type) { + case NLA_FLAG: + if (attrlen > 0) + return -ERANGE; + break; - if (pt->type == NLA_FLAG && nla_len(nla) > 0) - return -ERANGE; + case NLA_NUL_STRING: + if (pt->len) + minlen = min_t(int, attrlen, pt->len + 1); + else + minlen = attrlen; - if (nla_len(nla) < minlen) - return -ERANGE; + if (!minlen || memchr(nla_data(nla), '\0', minlen) == NULL) + return -EINVAL; + /* fall through */ + + case NLA_STRING: + if (attrlen < 1) + return -ERANGE; + + if (pt->len) { + char *buf = nla_data(nla); + + if (buf[attrlen - 1] == '\0') + attrlen--; + + if (attrlen > pt->len) + return -ERANGE; + } + break; + + default: + if (pt->len) + minlen = pt->len; + else if (pt->type != NLA_UNSPEC) + minlen = nla_attr_minlen[pt->type]; + + if (attrlen < minlen) + return -ERANGE; + } return 0; } @@ -255,6 +284,26 @@ struct nlattr *__nla_reserve(struct sk_buff *skb, int attrtype, int attrlen) } /** + * __nla_reserve_nohdr - reserve room for attribute without header + * @skb: socket buffer to reserve room on + * @attrlen: length of attribute payload + * + * Reserves room for attribute payload without a header. + * + * The caller is responsible to ensure that the skb provides enough + * tailroom for the payload. + */ +void *__nla_reserve_nohdr(struct sk_buff *skb, int attrlen) +{ + void *start; + + start = skb_put(skb, NLA_ALIGN(attrlen)); + memset(start, 0, NLA_ALIGN(attrlen)); + + return start; +} + +/** * nla_reserve - reserve room for attribute on the skb * @skb: socket buffer to reserve room on * @attrtype: attribute type @@ -275,6 +324,24 @@ struct nlattr *nla_reserve(struct sk_buff *skb, int attrtype, int attrlen) } /** + * nla_reserve - reserve room for attribute without header + * @skb: socket buffer to reserve room on + * @len: length of attribute payload + * + * Reserves room for attribute payload without a header. + * + * Returns NULL if the tailroom of the skb is insufficient to store + * the attribute payload. + */ +void *nla_reserve_nohdr(struct sk_buff *skb, int attrlen) +{ + if (unlikely(skb_tailroom(skb) < NLA_ALIGN(attrlen))) + return NULL; + + return __nla_reserve_nohdr(skb, attrlen); +} + +/** * __nla_put - Add a netlink attribute to a socket buffer * @skb: socket buffer to add attribute to * @attrtype: attribute type @@ -293,6 +360,22 @@ void __nla_put(struct sk_buff *skb, int attrtype, int attrlen, memcpy(nla_data(nla), data, attrlen); } +/** + * __nla_put_nohdr - Add a netlink attribute without header + * @skb: socket buffer to add attribute to + * @attrlen: length of attribute payload + * @data: head of attribute payload + * + * The caller is responsible to ensure that the skb provides enough + * tailroom for the attribute payload. + */ +void __nla_put_nohdr(struct sk_buff *skb, int attrlen, const void *data) +{ + void *start; + + start = __nla_reserve_nohdr(skb, attrlen); + memcpy(start, data, attrlen); +} /** * nla_put - Add a netlink attribute to a socket buffer @@ -313,15 +396,36 @@ int nla_put(struct sk_buff *skb, int attrtype, int attrlen, const void *data) return 0; } +/** + * nla_put_nohdr - Add a netlink attribute without header + * @skb: socket buffer to add attribute to + * @attrlen: length of attribute payload + * @data: head of attribute payload + * + * Returns -1 if the tailroom of the skb is insufficient to store + * the attribute payload. + */ +int nla_put_nohdr(struct sk_buff *skb, int attrlen, const void *data) +{ + if (unlikely(skb_tailroom(skb) < NLA_ALIGN(attrlen))) + return -1; + + __nla_put_nohdr(skb, attrlen, data); + return 0; +} EXPORT_SYMBOL(nla_validate); EXPORT_SYMBOL(nla_parse); EXPORT_SYMBOL(nla_find); EXPORT_SYMBOL(nla_strlcpy); EXPORT_SYMBOL(__nla_reserve); +EXPORT_SYMBOL(__nla_reserve_nohdr); EXPORT_SYMBOL(nla_reserve); +EXPORT_SYMBOL(nla_reserve_nohdr); EXPORT_SYMBOL(__nla_put); +EXPORT_SYMBOL(__nla_put_nohdr); EXPORT_SYMBOL(nla_put); +EXPORT_SYMBOL(nla_put_nohdr); EXPORT_SYMBOL(nla_memcpy); EXPORT_SYMBOL(nla_memcmp); EXPORT_SYMBOL(nla_strcmp); |