From 4a5da8d970cd2aa5659b6ef40220a69671465f74 Mon Sep 17 00:00:00 2001
From: Luiz Otavio O Souza <luiz@netgate.com>
Date: Tue, 15 Sep 2015 16:14:16 -0500
Subject: MFC r285247:

we may get here w/ non-sleepable locks held, so switch to _NOWAIT when
doing this memory allocation...

Reviewed by:    ae

TAG:	IPSEC-HEAD
Issue:	#4841
---
 sys/opencrypto/criov.c      | 7 +++++--
 sys/opencrypto/cryptodev.h  | 2 +-
 sys/opencrypto/cryptosoft.c | 4 +++-
 3 files changed, 9 insertions(+), 4 deletions(-)

(limited to 'sys/opencrypto')

diff --git a/sys/opencrypto/criov.c b/sys/opencrypto/criov.c
index f94631e..499bfe3 100644
--- a/sys/opencrypto/criov.c
+++ b/sys/opencrypto/criov.c
@@ -193,7 +193,7 @@ crypto_apply(int flags, caddr_t buf, int off, int len,
 	return (error);
 }
 
-void
+int
 crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr, int *cnt,
     int *allocated)
 {
@@ -216,7 +216,9 @@ crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr, int *cnt,
 			while ((mtmp = mtmp->m_next) != NULL)
 				j++;
 			iov = malloc(sizeof *iov * (i + j), M_CRYPTO_DATA,
-			    M_WAITOK);
+			    M_NOWAIT);
+			if (iov == NULL)
+				return ENOMEM;
 			*allocated = 1;
 			*cnt = i + j;
 			memcpy(iov, *iovptr, sizeof *iov * i);
@@ -235,4 +237,5 @@ crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr, int *cnt,
 
 	*iovptr = iov;
 	*cnt = i;
+	return 0;
 }
diff --git a/sys/opencrypto/cryptodev.h b/sys/opencrypto/cryptodev.h
index f434843..ab34b9e 100644
--- a/sys/opencrypto/cryptodev.h
+++ b/sys/opencrypto/cryptodev.h
@@ -465,7 +465,7 @@ extern	int cuio_apply(struct uio *uio, int off, int len,
 
 struct mbuf;
 struct iovec;
-extern	void crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr,
+extern	int crypto_mbuftoiov(struct mbuf *mbuf, struct iovec **iovptr,
 	    int *cnt, int *allocated);
 
 extern	void crypto_copyback(int flags, caddr_t buf, int off, int size,
diff --git a/sys/opencrypto/cryptosoft.c b/sys/opencrypto/cryptosoft.c
index d769eea..77ab507 100644
--- a/sys/opencrypto/cryptosoft.c
+++ b/sys/opencrypto/cryptosoft.c
@@ -147,8 +147,10 @@ swcr_encdec(struct cryptodesc *crd, struct swcr_data *sw, caddr_t buf,
 	iovalloc = 0;
 	uio = &uiolcl;
 	if ((flags & CRYPTO_F_IMBUF) != 0) {
-		crypto_mbuftoiov((struct mbuf *)buf, &iov, &iovcnt,
+		error = crypto_mbuftoiov((struct mbuf *)buf, &iov, &iovcnt,
 		    &iovalloc);
+		if (error)
+			return (error);
 		uio->uio_iov = iov;
 		uio->uio_iovcnt = iovcnt;
 	} else if ((flags & CRYPTO_F_IOV) != 0)
-- 
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