Messages in this thread Patch in this message | | | From | Tzung-Bi Shih <> | Subject | [PATCH v4 18/21] platform/chrome: cros_ec_proto: handle empty payload in getting cmd mask | Date | Thu, 9 Jun 2022 08:49:54 +0000 |
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cros_ec_get_host_command_version_mask() expects to receive sizeof(struct ec_response_get_cmd_versions) from send_command(). The payload is valid only if the return value is positive.
Return -EPROTO if send_command() returns 0 in cros_ec_get_host_command_version_mask().
Reviewed-by: Guenter Roeck <groeck@chromium.org> Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org> --- Changes from v3: - Add R-b tag.
drivers/platform/chrome/cros_ec_proto.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index ac445bbbd060..28c103315144 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -458,6 +458,11 @@ static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev, goto exit; } + if (ret == 0) { + ret = -EPROTO; + goto exit; + } + rver = (struct ec_response_get_cmd_versions *)msg->data; *mask = rver->version_mask; ret = 0; -- 2.36.1.255.ge46751e96f-goog
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