misc geom and gnu: make some use of mallocarray(9).

Focus on code where we are doing multiplications within malloc(9). None of
these ire likely to overflow, however the change is still useful as some
static checkers can benefit from the allocation attributes we use for
mallocarray.

This initial sweep only covers malloc(9) calls with M_NOWAIT. No good
reason but I started doing the changes before r327796 and at that time it
was convenient to make sure the sorrounding code could handle NULL values.

Differential revision: https://reviews.freebsd.org/D13837

1 files changed, 3 insertions, 2 deletions

diff --git a/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c b/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c
index 0e1291ea39b3..1fe47a9b40da 100644
--- a/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c
+++ b/sys/gnu/dev/bwn/phy_n/if_bwn_phy_n_core.c
@@ -1620,7 +1620,7 @@ static int bwn_nphy_load_samples(struct bwn_mac *mac,
 	uint16_t i;
 	uint32_t *data;
 
-	data = malloc(len * sizeof(uint32_t), M_DEVBUF, M_NOWAIT | M_ZERO);
+	data = mallocarray(len, sizeof(uint32_t), M_DEVBUF, M_NOWAIT | M_ZERO);
 	if (!data) {
 		BWN_ERRPRINTF(mac->mac_sc, "allocation for samples loading failed\n");
 		return -ENOMEM;
@@ -1663,7 +1663,8 @@ static uint16_t bwn_nphy_gen_load_samples(struct bwn_mac *mac, uint32_t freq, ui
 		len = bw << 1;
 	}
 
-	samples = malloc(len * sizeof(struct bwn_c32), M_DEVBUF, M_NOWAIT | M_ZERO);
+	samples = mallocarray(len, sizeof(struct bwn_c32), M_DEVBUF,
+	    M_NOWAIT | M_ZERO);
 	if (!samples) {
 		BWN_ERRPRINTF(mac->mac_sc, "allocation for samples generation failed\n");
 		return 0;