From: Sasha Levin <sashal@kernel•org>
To: linux-kernel@vger•kernel.org, stable@vger•kernel.org
Cc: Olof Johansson <olof@lixom•net>, Sasha Levin <sashal@kernel•org>,
linux-arm-kernel@lists•infradead.org,
Sudeep Holla <sudeep.holla@arm•com>
Subject: [PATCH AUTOSEL 4.19 116/205] firmware: arm_scmi: use strlcpy to ensure NULL-terminated strings
Date: Fri, 8 Nov 2019 06:36:23 -0500 [thread overview]
Message-ID: <20191108113752.12502-116-sashal@kernel.org> (raw)
In-Reply-To: <20191108113752.12502-1-sashal@kernel.org>
From: Sudeep Holla <sudeep.holla@arm•com>
[ Upstream commit ca64b719a1e665ac7449b6a968059176af7365a8 ]
Replace all the memcpy() for copying name strings from the firmware with
strlcpy() to make sure we are bounded by the source buffer size and we
also always have NULL-terminated strings.
This is needed to avoid out of bounds accesses if the firmware returns
a non-terminated string.
Reported-by: Olof Johansson <olof@lixom•net>
Acked-by: Olof Johansson <olof@lixom•net>
Signed-off-by: Sudeep Holla <sudeep.holla@arm•com>
Signed-off-by: Sasha Levin <sashal@kernel•org>
---
drivers/firmware/arm_scmi/base.c | 2 +-
drivers/firmware/arm_scmi/clock.c | 2 +-
drivers/firmware/arm_scmi/perf.c | 2 +-
drivers/firmware/arm_scmi/power.c | 2 +-
drivers/firmware/arm_scmi/sensors.c | 2 +-
5 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/firmware/arm_scmi/base.c b/drivers/firmware/arm_scmi/base.c
index 9dff33ea6416f..204390297f4bd 100644
--- a/drivers/firmware/arm_scmi/base.c
+++ b/drivers/firmware/arm_scmi/base.c
@@ -208,7 +208,7 @@ static int scmi_base_discover_agent_get(const struct scmi_handle *handle,
ret = scmi_do_xfer(handle, t);
if (!ret)
- memcpy(name, t->rx.buf, SCMI_MAX_STR_SIZE);
+ strlcpy(name, t->rx.buf, SCMI_MAX_STR_SIZE);
scmi_xfer_put(handle, t);
diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c
index e4119eb34986c..30fc04e284312 100644
--- a/drivers/firmware/arm_scmi/clock.c
+++ b/drivers/firmware/arm_scmi/clock.c
@@ -111,7 +111,7 @@ static int scmi_clock_attributes_get(const struct scmi_handle *handle,
ret = scmi_do_xfer(handle, t);
if (!ret)
- memcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE);
+ strlcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE);
else
clk->name[0] = '\0';
diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index 64342944d9175..87c99d296ecd3 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -174,7 +174,7 @@ scmi_perf_domain_attributes_get(const struct scmi_handle *handle, u32 domain,
dom_info->mult_factor =
(dom_info->sustained_freq_khz * 1000) /
dom_info->sustained_perf_level;
- memcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE);
+ strlcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE);
}
scmi_xfer_put(handle, t);
diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c
index cfa033b05aed5..62f3401a1f01e 100644
--- a/drivers/firmware/arm_scmi/power.c
+++ b/drivers/firmware/arm_scmi/power.c
@@ -106,7 +106,7 @@ scmi_power_domain_attributes_get(const struct scmi_handle *handle, u32 domain,
dom_info->state_set_notify = SUPPORTS_STATE_SET_NOTIFY(flags);
dom_info->state_set_async = SUPPORTS_STATE_SET_ASYNC(flags);
dom_info->state_set_sync = SUPPORTS_STATE_SET_SYNC(flags);
- memcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE);
+ strlcpy(dom_info->name, attr->name, SCMI_MAX_STR_SIZE);
}
scmi_xfer_put(handle, t);
diff --git a/drivers/firmware/arm_scmi/sensors.c b/drivers/firmware/arm_scmi/sensors.c
index 27f2092b9882a..b53d5cc9c9f6c 100644
--- a/drivers/firmware/arm_scmi/sensors.c
+++ b/drivers/firmware/arm_scmi/sensors.c
@@ -140,7 +140,7 @@ static int scmi_sensor_description_get(const struct scmi_handle *handle,
s = &si->sensors[desc_index + cnt];
s->id = le32_to_cpu(buf->desc[cnt].id);
s->type = SENSOR_TYPE(attrh);
- memcpy(s->name, buf->desc[cnt].name, SCMI_MAX_STR_SIZE);
+ strlcpy(s->name, buf->desc[cnt].name, SCMI_MAX_STR_SIZE);
}
desc_index += num_returned;
--
2.20.1
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next parent reply other threads:[~2019-11-08 11:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191108113752.12502-1-sashal@kernel.org>
2019-11-08 11:36 ` Sasha Levin [this message]
2019-11-08 11:36 ` [PATCH AUTOSEL 4.19 128/205] dmaengine: at_xdmac: remove a stray bottom half unlock Sasha Levin
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