From: Alex Elder <elder@linaro.org>
To: andy.gross@linaro.org
Cc: clew@codeaurora.org, aneela@codeaurora.org,
david.brown@linaro.org, linux-arm-msm@vger.kernel.org,
linux-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 09/12] soc: qcom: smem: verify partition offset_free_uncached
Date: Tue, 1 May 2018 20:10:16 -0500 [thread overview]
Message-ID: <20180502011019.22812-10-elder@linaro.org> (raw)
In-Reply-To: <20180502011019.22812-1-elder@linaro.org>
Add verification in qcom_smem_partition_header() that the
offset_free_uncached field in a partition's header structure does
not exceed the partition's size.
Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/soc/qcom/smem.c | 21 +++++++--------------
1 file changed, 7 insertions(+), 14 deletions(-)
diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index f1e6e4609ccb..7ef415c4d62e 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -755,6 +755,12 @@ qcom_smem_partition_header(struct qcom_smem *smem,
return NULL;
}
+ if (le32_to_cpu(header->offset_free_uncached) > size) {
+ dev_err(smem->dev, "bad partition free uncached (%u > %u)\n",
+ le32_to_cpu(header->offset_free_uncached), size);
+ return NULL;
+ }
+
return header;
}
@@ -763,7 +769,7 @@ static int qcom_smem_set_global_partition(struct qcom_smem *smem)
struct smem_partition_header *header;
struct smem_ptable_entry *entry;
struct smem_ptable *ptable;
- u32 host0, host1, size;
+ u32 host0, host1;
bool found = false;
int i;
@@ -803,13 +809,6 @@ static int qcom_smem_set_global_partition(struct qcom_smem *smem)
return -EINVAL;
}
- size = le32_to_cpu(header->offset_free_uncached);
- if (size > le32_to_cpu(header->size)) {
- dev_err(smem->dev,
- "Global partition has invalid free pointer\n");
- return -EINVAL;
- }
-
smem->global_partition = header;
smem->global_cacheline = le32_to_cpu(entry->cacheline);
@@ -871,12 +870,6 @@ static int qcom_smem_enumerate_partitions(struct qcom_smem *smem,
return -EINVAL;
}
- if (le32_to_cpu(header->offset_free_uncached) > le32_to_cpu(header->size)) {
- dev_err(smem->dev,
- "Partition %d has invalid free pointer\n", i);
- return -EINVAL;
- }
-
smem->partitions[remote_host] = header;
smem->cacheline[remote_host] = le32_to_cpu(entry->cacheline);
}
--
2.14.1
next prev parent reply other threads:[~2018-05-02 1:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-02 1:10 [PATCH 00/12] soc: qcom: smem: some refactoring Alex Elder
2018-05-02 1:10 ` [PATCH 01/12] soc: qcom: smem: rename variable in qcom_smem_get_global() Alex Elder
2018-05-02 1:10 ` [PATCH 02/12] soc: qcom: smem: initialize region struct only when successful Alex Elder
2018-05-02 1:10 ` [PATCH 03/12] soc: qcom: smem: always ignore partitions with 0 offset or size Alex Elder
2018-05-02 1:10 ` [PATCH 04/12] soc: qcom: smem: small refactor in qcom_smem_enumerate_partitions() Alex Elder
2018-05-02 1:10 ` [PATCH 05/12] soc: qcom: smem: verify both host ids in partition header Alex Elder
2018-05-02 1:10 ` [PATCH 06/12] soc: qcom: smem: require order of host ids to match Alex Elder
2018-05-02 1:10 ` [PATCH 07/12] soc: qcom: smem: introduce qcom_smem_partition_header() Alex Elder
2018-05-02 1:10 ` [PATCH 08/12] soc: qcom: smem: verify partition header size Alex Elder
2018-05-02 1:10 ` Alex Elder [this message]
2018-05-02 1:10 ` [PATCH 10/12] soc: qcom: smem: small change in global entry loop Alex Elder
2018-05-02 1:10 ` [PATCH 11/12] soc: qcom: smem: verify partition host ids match Alex Elder
2018-05-02 1:10 ` [PATCH 12/12] soc: qcom: smem: a few last cleanups Alex Elder
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