870-ca8210-Fix-crash-by-zero-initializing-data.patch

From 1e24c54da257ab93cff5826be8a793b014a5dc9c Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Mon, 21 Nov 2022 01:22:01 +0100
Subject: ca8210: Fix crash by zero initializing data

The struct cas_control embeds multiple generic SPI structures and we
have to make sure these structures are initialized to default values.
This driver does not set all attributes. When using kmalloc before some
attributes were not initialized and contained random data which caused
random crashes at bootup.

Fixes: ded845a781a5 ("ieee802154: Add CA8210 IEEE 802.15.4 device driver")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Link: https://lore.kernel.org/r/20221121002201.1339636-1-hauke@hauke-m.de
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
---
 drivers/net/ieee802154/ca8210.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ieee802154/ca8210.c
+++ b/drivers/net/ieee802154/ca8210.c
@@ -927,7 +927,7 @@ static int ca8210_spi_transfer(
 
 	dev_dbg(&spi->dev, "%s called\n", __func__);
 
-	cas_ctl = kmalloc(sizeof(*cas_ctl), GFP_ATOMIC);
+	cas_ctl = kzalloc(sizeof(*cas_ctl), GFP_ATOMIC);
 	if (!cas_ctl)
 		return -ENOMEM;