Use additional checks in skiboot for pointers

The checks validate pointers sent in using
opal_addr_valid() in opal_call API's provided
via the console, cpu, fdt, flash, i2c, interrupts,
nvram, opal-msg, opal, opal-pci, xscom and
cec modules

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/core/i2c.c b/core/i2c.c
index cf9dd67..de74681 100644
--- a/core/i2c.c
+++ b/core/i2c.c
@@ -59,6 +59,9 @@ static int opal_i2c_request(uint64_t async_token, uint32_t bus_id,
 	struct i2c_request *req;
 	int rc;
 
+	if (!opal_addr_valid(oreq))
+		return OPAL_PARAMETER;
+
 	if (oreq->flags & OPAL_I2C_ADDR_10)
 		return OPAL_UNSUPPORTED;