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xfrm: clone XFRMA_SEC_CTX in xfrm_do_migrate

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[ Upstream commit 7aa05d304785204703a67a6aa7f1db402889a172 ]

XFRMA_SEC_CTX was not cloned from the old to the new.
Migrate this attribute during XFRMA_MSG_MIGRATE

v1->v2:
 - return -ENOMEM on error
v2->v3:
 - fix return type to int

Fixes: 80c9abaabf ("[XFRM]: Extension for dynamic update of endpoint address(es)")
Signed-off-by: Antony Antony <antony.antony@secunet.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Antony Antony 2020-09-04 08:50:11 +02:00 committed by Greg Kroah-Hartman
parent c1becfebe3
commit 7ea7436c40
1 changed files with 28 additions and 0 deletions
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28
net/xfrm/xfrm_state.c
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@ -1438,6 +1438,30 @@ int xfrm_state_add(struct xfrm_state *x)
EXPORT_SYMBOL(xfrm_state_add);
#ifdef CONFIG_XFRM_MIGRATE
static inline int clone_security(struct xfrm_state *x, struct xfrm_sec_ctx *security)
{
struct xfrm_user_sec_ctx *uctx;
int size = sizeof(*uctx) + security->ctx_len;
int err;
uctx = kmalloc(size, GFP_KERNEL);
if (!uctx)
return -ENOMEM;
uctx->exttype = XFRMA_SEC_CTX;
uctx->len = size;
uctx->ctx_doi = security->ctx_doi;
uctx->ctx_alg = security->ctx_alg;
uctx->ctx_len = security->ctx_len;
memcpy(uctx + 1, security->ctx_str, security->ctx_len);
err = security_xfrm_state_alloc(x, uctx);
kfree(uctx);
if (err)
return err;
return 0;
}
static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
struct xfrm_encap_tmpl *encap)
{
@ -1494,6 +1518,10 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig,
goto error;
}
if (orig->security)
if (clone_security(x, orig->security))
goto error;
if (orig->coaddr) {
x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
GFP_KERNEL);