libmisc: Add alloc.h to help detect wrong alloc sizes

Lo and behold, there was a mistake in chan.c.

1 files changed, 2 insertions, 1 deletions

diff --git a/libhw_cr/host_net.c b/libhw_cr/host_net.c
index 6ed6e46..ba634a6 100644
--- a/libhw_cr/host_net.c
+++ b/libhw_cr/host_net.c
@@ -19,6 +19,7 @@
 #include <signal.h>     /* for siginfo_t, struct sigaction, enum sigval, sigaction(), SA_SIGINFO */
 
 #include <libcr/coroutine.h>
+#include <libmisc/alloc.h>
 #include <libmisc/assert.h>
 #include <libmisc/macro.h>
 #include <libobj/obj.h>
@@ -283,7 +284,7 @@ static void *hostnet_pthread_writev(void *_args) {
 	struct hostnet_pthread_writev_args *args = _args;
 
 	size_t count = 0;
-	struct iovec *iov = alloca(sizeof(struct iovec)*args->iovcnt);
+	struct iovec *iov = stack_alloc(args->iovcnt, struct iovec);
 	for (int i = 0; i < args->iovcnt; i++) {
 		iov[i] = args->iov[i];
 		count += args->iov[i].iov_len;