Unsign some values related to allocation.

When allocating memory through malloc(9), we always expect the amount of
memory requested to be unsigned as a negative value would either stand for
an error or an overflow.
Unsign some values, found when considering the use of mallocarray(9), to
avoid unnecessary casting. Also consider that indexes should be of
at least the same size/type as the upper limit they pretend to index.

MFC after:	3 weeks

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/netsmb/smb_crypt.c b/sys/netsmb/smb_crypt.c
index 394b026523a9..27f824cf88bf 100644
--- a/sys/netsmb/smb_crypt.c
+++ b/sys/netsmb/smb_crypt.c
@@ -118,7 +118,7 @@ smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN)
 	u_char S21[21];
 	u_int16_t *unipwd;
 	MD4_CTX *ctxp;
-	int len;
+	u_int len;
 
 	len = strlen(apwd);
 	unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK);
@@ -148,7 +148,7 @@ smb_calcmackey(struct smb_vc *vcp)
 {
 	const char *pwd;
 	u_int16_t *unipwd;
-	int len;
+	u_int len;
 	MD4_CTX md4;
 	u_char S16[16], S21[21];