From: Sabrina Dubroca sd@queasysnail.net
stable inclusion from stable-v5.10.135 commit 2daf0a1261c7b43416200e59bd35ccea66951797 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5ZWFM
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit b07a0e2044057f201d694ab474f5c42a02b6465b ]
IEEE 802.1AEbw-2013 (section 10.7.8) specifies that the maximum value of the replay window is 2^30-1, to help with recovery of the upper bits of the PN.
To avoid leaving the existing macsec device in an inconsistent state if this test fails during changelink, reuse the cleanup mechanism introduced for HW offload. This wasn't needed until now because macsec_changelink_common could not fail during changelink, as modifying the cipher suite was not allowed.
Finally, this must happen after handling IFLA_MACSEC_CIPHER_SUITE so that secy->xpn is set.
Fixes: 48ef50fa866a ("macsec: Netlink support of XPN cipher suites (IEEE 802.1AEbw)") Signed-off-by: Sabrina Dubroca sd@queasysnail.net Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/net/macsec.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index c2d8bcda2503..96dc7bd4813d 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -240,6 +240,7 @@ 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) { @@ -3738,9 +3739,6 @@ 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]);
@@ -3786,6 +3784,16 @@ 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; }
@@ -3815,7 +3823,7 @@ 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)) {