vhost: vringh: use krealloc_array()

Use the helper that checks for overflows internally instead of manually
calculating the size of the new array.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Bartosz Golaszewski <[e-mail]>
Acked-by: Michael S. Tsirkin <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Andy Shevchenko <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: Christian Knig <[e-mail]>
Cc: Christoph Lameter <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: David Airlie <[e-mail]>
Cc: David Rientjes <[e-mail]>
Cc: Gustavo Padovan <[e-mail]>
Cc: James Morse <[e-mail]>
Cc: Jaroslav Kysela <[e-mail]>
Cc: Jason Wang <[e-mail]>
Cc: Joonsoo Kim <[e-mail]>
Cc: Linus Walleij <[e-mail]>
Cc: Maarten Lankhorst <[e-mail]>
Cc: Mauro Carvalho Chehab <[e-mail]>
Cc: Maxime Ripard <[e-mail]>
Cc: Pekka Enberg <[e-mail]>
Cc: Robert Richter <[e-mail]>
Cc: Sumit Semwal <[e-mail]>
Cc: Takashi Iwai <[e-mail]>
Cc: Takashi Iwai <[e-mail]>
Cc: Thomas Zimmermann <[e-mail]>
Cc: Tony Luck <[e-mail]>
Cc: Vlastimil Babka <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/vhost/vringh.c

···
 
 	flag = (iov->max_num & VRINGH_IOV_ALLOCATED);
 	if (flag)
-		new = krealloc(iov->iov, new_num * sizeof(struct iovec), gfp);
+		new = krealloc_array(iov->iov, new_num,
+				     sizeof(struct iovec), gfp);
 	else {
 		new = kmalloc_array(new_num, sizeof(struct iovec), gfp);
 		if (new) {