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diff --git a/sys/opencrypto/criov.c b/sys/opencrypto/criov.c
--- a/sys/opencrypto/criov.c
+++ b/sys/opencrypto/criov.c
@@ -321,6 +321,7 @@
break;
case CRYPTO_BUF_UIO:
cc->cc_iov = cb->cb_uio->uio_iov;
+ cc->cc_buf_len = cb->cb_uio->uio_resid;
break;
default:
#ifdef INVARIANTS
@@ -386,6 +387,7 @@
cc->cc_offset += amount;
break;
}
+ cc->cc_buf_len -= remain;
amount -= remain;
cc->cc_iov++;
cc->cc_offset = 0;
@@ -406,14 +408,34 @@
{
switch (cc->cc_type) {
case CRYPTO_BUF_CONTIG:
- *len = cc->cc_buf_len;
- return (cc->cc_buf);
+ case CRYPTO_BUF_UIO:
+ case CRYPTO_BUF_VMPAGE:
+ if (cc->cc_buf_len == 0) {
+ *len = 0;
+ return (NULL);
+ }
+ break;
case CRYPTO_BUF_MBUF:
case CRYPTO_BUF_SINGLE_MBUF:
if (cc->cc_mbuf == NULL) {
*len = 0;
return (NULL);
}
+ break;
+ default:
+#ifdef INVARIANTS
+ panic("%s: invalid buffer type %d", __func__, cc->cc_type);
+#endif
+ *len = 0;
+ return (NULL);
+ }
+
+ switch (cc->cc_type) {
+ case CRYPTO_BUF_CONTIG:
+ *len = cc->cc_buf_len;
+ return (cc->cc_buf);
+ case CRYPTO_BUF_MBUF:
+ case CRYPTO_BUF_SINGLE_MBUF:
if (cc->cc_mbuf->m_flags & M_EXTPG)
return (m_epg_segment(cc->cc_mbuf, cc->cc_offset, len));
*len = cc->cc_mbuf->m_len - cc->cc_offset;
@@ -426,11 +448,7 @@
*len = cc->cc_iov->iov_len - cc->cc_offset;
return ((char *)cc->cc_iov->iov_base + cc->cc_offset);
default:
-#ifdef INVARIANTS
- panic("%s: invalid buffer type %d", __func__, cc->cc_type);
-#endif
- *len = 0;
- return (NULL);
+ __assert_unreachable();
}
}
@@ -504,6 +522,7 @@
todo = MIN(remain, size);
memcpy(dst, src, todo);
src += todo;
+ cc->cc_buf_len -= todo;
if (todo < remain) {
cc->cc_offset += todo;
break;
@@ -593,6 +612,7 @@
todo = MIN(remain, size);
memcpy(dst, src, todo);
dst += todo;
+ cc->cc_buf_len -= todo;
if (todo < remain) {
cc->cc_offset += todo;
break;

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