Drivers: hv : vmbus: Adding NULL pointer check

This patch fixes the following Coccinelle warning: drivers/hv/ring_buffer.c:223: alloc with no test Reported-by: Zeal Robot <[email protected]> Signed-off-by: Lv Ruyi <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Wei Liu <[email protected]>
wafgo · Oct 28, 2021 · 01ccca3 · 01ccca3
1 parent 0b90608
commit 01ccca3
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
@@ -223,6 +223,8 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
 		pages_wraparound = kcalloc(page_cnt * 2 - 1,
 					   sizeof(struct page *),
 					   GFP_KERNEL);
+		if (!pages_wraparound)
+			return -ENOMEM;
 
 		pages_wraparound[0] = pages;
 		for (i = 0; i < 2 * (page_cnt - 1); i++)