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@xxxxxxxxxx>
---
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 95d218d3a595..f5d7af1623a9 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);
@@ -873,12 +872,6 @@ 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);
}
--
2.17.1
--
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