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Date: Tue, 25 Jan 2022 17:37:44 -0600 From: "Gustavo A. R. Silva" <gustavoars@...nel.org> To: Jiri Kosina <jikos@...nel.org>, Benjamin Tissoires <benjamin.tissoires@...hat.com> Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-hardening@...r.kernel.org Subject: [PATCH][next] HID: google: 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/hid/hid-google-hammer.c:61:23: 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/hid/hid-google-hammer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hid/hid-google-hammer.c b/drivers/hid/hid-google-hammer.c index 0403beb3104b..ddbe0de177e2 100644 --- a/drivers/hid/hid-google-hammer.c +++ b/drivers/hid/hid-google-hammer.c @@ -58,7 +58,7 @@ static int cbas_ec_query_base(struct cros_ec_device *ec_dev, bool get_state, struct cros_ec_command *msg; int ret; - msg = kzalloc(sizeof(*msg) + max(sizeof(u32), sizeof(*params)), + msg = kzalloc(struct_size(msg, data, max(sizeof(u32), sizeof(*params))), GFP_KERNEL); if (!msg) return -ENOMEM; -- 2.27.0
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