From: Cristian Marussi <cristian.marussi@arm.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
virtualization@lists.linux-foundation.org,
virtio-dev@lists.oasis-open.org
Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com,
Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com,
etienne.carriere@linaro.org, vincent.guittot@linaro.org,
souvik.chakravarty@arm.com, cristian.marussi@arm.com,
igor.skalkin@opensynergy.com, peter.hilber@opensynergy.com,
alex.bennee@linaro.org, jean-philippe@linaro.org,
mikhail.golubev@opensynergy.com, anton.yakovlev@opensynergy.com,
Vasyl.Vavrychuk@opensynergy.com,
Andriy.Tryshnivskyy@opensynergy.com
Subject: [PATCH v5 02/15] firmware: arm_scmi: Fix max pending messages boundary check
Date: Mon, 5 Jul 2021 15:49:01 +0100 [thread overview]
Message-ID: <20210705144914.35094-3-cristian.marussi@arm.com> (raw)
In-Reply-To: <20210705144914.35094-1-cristian.marussi@arm.com>
SCMI message headers carry a sequence number and such field is sized to
allow for MSG_TOKEN_MAX distinct numbers; moreover zero is not really an
acceptable maximum number of pending in-flight messages.
Fix accordignly the checks performed on the value exported by transports
in scmi_desc.max_msg.
Reported-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
drivers/firmware/arm_scmi/driver.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 66e5e694be7d..d2c98642cb14 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -1025,8 +1025,9 @@ static int __scmi_xfer_info_init(struct scmi_info *sinfo,
const struct scmi_desc *desc = sinfo->desc;
/* Pre-allocated messages, no more than what hdr.seq can support */
- if (WARN_ON(desc->max_msg >= MSG_TOKEN_MAX)) {
- dev_err(dev, "Maximum message of %d exceeds supported %ld\n",
+ if (WARN_ON(!desc->max_msg || desc->max_msg > MSG_TOKEN_MAX)) {
+ dev_err(dev,
+ "Invalid max_msg %d. Maximum messages supported %lu.\n",
desc->max_msg, MSG_TOKEN_MAX);
return -EINVAL;
}
--
2.17.1
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next prev parent reply other threads:[~2021-07-05 14:52 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-05 14:48 [PATCH v5 00/15] Introduce SCMI transport based on VirtIO Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 01/15] firmware: arm_scmi: Avoid padding in sensor message structure Cristian Marussi
2021-07-05 14:49 ` Cristian Marussi [this message]
2021-07-05 14:49 ` [PATCH v5 03/15] firmware: arm_scmi: Add support for type handling in common functions Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 04/15] firmware: arm_scmi: Remove scmi_dump_header_dbg() helper Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 05/15] firmware: arm_scmi: Add transport optional init/exit support Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 06/15] firmware: arm_scmi: Introduce monotonically increasing tokens Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 07/15] firmware: arm_scmi: Handle concurrent and out-of-order messages Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 08/15] firmware: arm_scmi: Introduce optional support for delegated xfers Cristian Marussi
2021-07-06 14:18 ` Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 09/15] firmware: arm_scmi: Make SCMI transports configurable Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 10/15] firmware: arm_scmi: Make shmem support optional for transports Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 11/15] firmware: arm_scmi: Add method to override max message number Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 12/15] firmware: arm_scmi: Add message passing abstractions for transports Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 13/15] firmware: arm_scmi: Add optional link_supplier() transport op Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 14/15] dt-bindings: arm: Add virtio transport for SCMI Cristian Marussi
2021-07-05 14:49 ` [PATCH v5 15/15] firmware: arm_scmi: Add virtio transport Cristian Marussi
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