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| author | David S. Miller <davem@davemloft.net> | 2022-07-25 11:49:25 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-25 11:49:25 +0100 |
| commit | 20a854616d384d3210d96fee248a3ea327bab810 (patch) | |
| tree | 3131d6cf576f7fd5ebd50705e83d8856e6931332 | |
| parent | 1aaa62c4838a140d0592935c51985158963d5971 (diff) | |
| parent | c630d1fe6219769049c87d1a6a0e9a6de55328a1 (diff) | |
| download | linux-gpio-intel-20a854616d384d3210d96fee248a3ea327bab810.tar.gz | |
Merge branch 'macsec-config-issues'
Sabrina Dubroca says:
====================
macsec: fix config issues
The patch adding netlink support for XPN (commit 48ef50fa866a
("macsec: Netlink support of XPN cipher suites (IEEE 802.1AEbw)"))
introduced several issues, including a kernel panic reported at [1].
Reproducing those bugs with upstream iproute is limited, since iproute
doesn't currently support XPN. I'm also working on this.
[1] https://bugzilla.kernel.org/show_bug.cgi?id=208315
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/macsec.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index 817577e713d70..95578f04f2123 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -243,6 +243,7 @@ static struct macsec_cb *macsec_skb_cb(struct sk_buff *skb) #define DEFAULT_SEND_SCI true #define DEFAULT_ENCRYPT false #define DEFAULT_ENCODING_SA 0 +#define MACSEC_XPN_MAX_REPLAY_WINDOW (((1 << 30) - 1)) static bool send_sci(const struct macsec_secy *secy) { @@ -1697,7 +1698,7 @@ static bool validate_add_rxsa(struct nlattr **attrs) return false; if (attrs[MACSEC_SA_ATTR_PN] && - *(u64 *)nla_data(attrs[MACSEC_SA_ATTR_PN]) == 0) + nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) return false; if (attrs[MACSEC_SA_ATTR_ACTIVE]) { @@ -1753,7 +1754,8 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) } pn_len = secy->xpn ? MACSEC_XPN_PN_LEN : MACSEC_DEFAULT_PN_LEN; - if (nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { + if (tb_sa[MACSEC_SA_ATTR_PN] && + nla_len(tb_sa[MACSEC_SA_ATTR_PN]) != pn_len) { pr_notice("macsec: nl: add_rxsa: bad pn length: %d != %d\n", nla_len(tb_sa[MACSEC_SA_ATTR_PN]), pn_len); rtnl_unlock(); @@ -1769,7 +1771,7 @@ static int macsec_add_rxsa(struct sk_buff *skb, struct genl_info *info) if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { pr_notice("macsec: nl: add_rxsa: bad salt length: %d != %d\n", nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), - MACSEC_SA_ATTR_SALT); + MACSEC_SALT_LEN); rtnl_unlock(); return -EINVAL; } @@ -1939,7 +1941,7 @@ static bool validate_add_txsa(struct nlattr **attrs) if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) return false; - if (nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) + if (nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) return false; if (attrs[MACSEC_SA_ATTR_ACTIVE]) { @@ -2011,7 +2013,7 @@ static int macsec_add_txsa(struct sk_buff *skb, struct genl_info *info) if (nla_len(tb_sa[MACSEC_SA_ATTR_SALT]) != MACSEC_SALT_LEN) { pr_notice("macsec: nl: add_txsa: bad salt length: %d != %d\n", nla_len(tb_sa[MACSEC_SA_ATTR_SALT]), - MACSEC_SA_ATTR_SALT); + MACSEC_SALT_LEN); rtnl_unlock(); return -EINVAL; } @@ -2293,7 +2295,7 @@ static bool validate_upd_sa(struct nlattr **attrs) if (nla_get_u8(attrs[MACSEC_SA_ATTR_AN]) >= MACSEC_NUM_AN) return false; - if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u32(attrs[MACSEC_SA_ATTR_PN]) == 0) + if (attrs[MACSEC_SA_ATTR_PN] && nla_get_u64(attrs[MACSEC_SA_ATTR_PN]) == 0) return false; if (attrs[MACSEC_SA_ATTR_ACTIVE]) { @@ -3745,9 +3747,6 @@ static int macsec_changelink_common(struct net_device *dev, secy->operational = tx_sa && tx_sa->active; } - if (data[IFLA_MACSEC_WINDOW]) - secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); - if (data[IFLA_MACSEC_ENCRYPT]) tx_sc->encrypt = !!nla_get_u8(data[IFLA_MACSEC_ENCRYPT]); @@ -3793,6 +3792,16 @@ static int macsec_changelink_common(struct net_device *dev, } } + if (data[IFLA_MACSEC_WINDOW]) { + secy->replay_window = nla_get_u32(data[IFLA_MACSEC_WINDOW]); + + /* IEEE 802.1AEbw-2013 10.7.8 - maximum replay window + * for XPN cipher suites */ + if (secy->xpn && + secy->replay_window > MACSEC_XPN_MAX_REPLAY_WINDOW) + return -EINVAL; + } + return 0; } @@ -3822,7 +3831,7 @@ static int macsec_changelink(struct net_device *dev, struct nlattr *tb[], ret = macsec_changelink_common(dev, data); if (ret) - return ret; + goto cleanup; /* If h/w offloading is available, propagate to the device */ if (macsec_is_offloaded(macsec)) { |