From c2dcb1b06053a1ccfb73fe84e7b54b92383401cc Mon Sep 17 00:00:00 2001 From: Tzung-Bi Shih Date: Fri, 13 May 2022 12:41:39 +0800 Subject: [PATCH] platform/chrome: cros_ec_proto: drop BUG_ON() in cros_ec_prepare_tx() It is overkill to crash the kernel if the given message is oversize. Drop the BUG_ON() and return -EINVAL instead. Reviewed-by: Guenter Roeck Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20220513044143.1045728-4-tzungbi@kernel.org --- drivers/platform/chrome/cros_ec_proto.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index 2d6d3fb..9ce3374 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -60,7 +60,8 @@ static int prepare_packet(struct cros_ec_device *ec_dev, int i; u8 csum = 0; - BUG_ON(msg->outsize + sizeof(*request) > ec_dev->dout_size); + if (msg->outsize + sizeof(*request) > ec_dev->dout_size) + return -EINVAL; out = ec_dev->dout; request = (struct ec_host_request *)out; @@ -176,7 +177,9 @@ int cros_ec_prepare_tx(struct cros_ec_device *ec_dev, if (ec_dev->proto_version > 2) return prepare_packet(ec_dev, msg); - BUG_ON(msg->outsize > EC_PROTO2_MAX_PARAM_SIZE); + if (msg->outsize > EC_PROTO2_MAX_PARAM_SIZE) + return -EINVAL; + out = ec_dev->dout; out[0] = EC_CMD_VERSION0 + msg->version; out[1] = msg->command; -- 2.7.4