diff options
Diffstat (limited to 'net/ipv6/calipso.c')
| -rw-r--r-- | net/ipv6/calipso.c | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/net/ipv6/calipso.c b/net/ipv6/calipso.c index dbcea9fee626..df1986973430 100644 --- a/net/ipv6/calipso.c +++ b/net/ipv6/calipso.c @@ -32,7 +32,7 @@ #include <linux/unaligned.h> #include <linux/crc-ccitt.h> -/* Maximium size of the calipso option including +/* Maximum size of the calipso option including * the two-byte TLV header. */ #define CALIPSO_OPT_LEN_MAX (2 + 252) @@ -42,13 +42,13 @@ */ #define CALIPSO_HDR_LEN (2 + 8) -/* Maximium size of the calipso option including +/* Maximum size of the calipso option including * the two-byte TLV header and upto 3 bytes of * leading pad and 7 bytes of trailing pad. */ #define CALIPSO_OPT_LEN_MAX_WITH_PAD (3 + CALIPSO_OPT_LEN_MAX + 7) - /* Maximium size of u32 aligned buffer required to hold calipso + /* Maximum size of u32 aligned buffer required to hold calipso * option. Max of 3 initial pad bytes starting from buffer + 3. * i.e. the worst case is when the previous tlv finishes on 4n + 3. */ @@ -1072,8 +1072,13 @@ static int calipso_sock_getattr(struct sock *sk, struct ipv6_opt_hdr *hop; int opt_len, len, ret_val = -ENOMSG, offset; unsigned char *opt; - struct ipv6_txoptions *txopts = txopt_get(inet6_sk(sk)); + struct ipv6_pinfo *pinfo = inet6_sk(sk); + struct ipv6_txoptions *txopts; + + if (!pinfo) + return -EAFNOSUPPORT; + txopts = txopt_get(pinfo); if (!txopts || !txopts->hopopt) goto done; @@ -1125,8 +1130,13 @@ static int calipso_sock_setattr(struct sock *sk, { int ret_val; struct ipv6_opt_hdr *old, *new; - struct ipv6_txoptions *txopts = txopt_get(inet6_sk(sk)); + struct ipv6_pinfo *pinfo = inet6_sk(sk); + struct ipv6_txoptions *txopts; + if (!pinfo) + return -EAFNOSUPPORT; + + txopts = txopt_get(pinfo); old = NULL; if (txopts) old = txopts->hopopt; @@ -1153,8 +1163,13 @@ static int calipso_sock_setattr(struct sock *sk, static void calipso_sock_delattr(struct sock *sk) { struct ipv6_opt_hdr *new_hop; - struct ipv6_txoptions *txopts = txopt_get(inet6_sk(sk)); + struct ipv6_pinfo *pinfo = inet6_sk(sk); + struct ipv6_txoptions *txopts; + if (!pinfo) + return; + + txopts = txopt_get(pinfo); if (!txopts || !txopts->hopopt) goto done; @@ -1192,6 +1207,10 @@ static int calipso_req_setattr(struct request_sock *req, struct ipv6_opt_hdr *old, *new; struct sock *sk = sk_to_full_sk(req_to_sk(req)); + /* sk is NULL for SYN+ACK w/ SYN Cookie */ + if (!sk) + return -ENOMEM; + if (req_inet->ipv6_opt && req_inet->ipv6_opt->hopopt) old = req_inet->ipv6_opt->hopopt; else @@ -1232,6 +1251,10 @@ static void calipso_req_delattr(struct request_sock *req) struct ipv6_txoptions *txopts; struct sock *sk = sk_to_full_sk(req_to_sk(req)); + /* sk is NULL for SYN+ACK w/ SYN Cookie */ + if (!sk) + return; + if (!req_inet->ipv6_opt || !req_inet->ipv6_opt->hopopt) return; |