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Date: Tue, 25 Jan 2022 13:26:34 -0600 From: "Gustavo A. R. Silva" <gustavoars@...nel.org> To: MyungJoo Ham <myungjoo.ham@...sung.com>, Chanwoo Choi <cw00.choi@...sung.com>, Benson Leung <bleung@...omium.org>, Guenter Roeck <groeck@...omium.org> Cc: linux-kernel@...r.kernel.org, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-hardening@...r.kernel.org Subject: [PATCH][next] extcon: usbc-cros-ec: Use struct_size() helper in kzalloc() Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Also, address the following sparse warnings: drivers/extcon/extcon-usbc-cros-ec.c:71:23: warning: using sizeof on a flexible structure Link: https://github.com/KSPP/linux/issues/174 Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org> --- drivers/extcon/extcon-usbc-cros-ec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/extcon/extcon-usbc-cros-ec.c b/drivers/extcon/extcon-usbc-cros-ec.c index 5290cc2d19d9..fde1db62be0d 100644 --- a/drivers/extcon/extcon-usbc-cros-ec.c +++ b/drivers/extcon/extcon-usbc-cros-ec.c @@ -68,7 +68,7 @@ static int cros_ec_pd_command(struct cros_ec_extcon_info *info, struct cros_ec_command *msg; int ret; - msg = kzalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL); + msg = kzalloc(struct_size(msg, data, max(outsize, insize)), GFP_KERNEL); if (!msg) return -ENOMEM; -- 2.27.0
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