ipmi: Fix NULL pointer dereference in ssif_probe

There is a potential execution path in which function ssif_info_find()
returns NULL, hence there is a NULL pointer dereference when accessing
pointer *addr_info*

Fix this by null checking *addr_info* before dereferencing it.

Addresses-Coverity-ID: 1473145 ("Explicit null dereferenced")
Fixes: e333054a91d1 ("ipmi: Fix I2C client removal in the SSIF driver")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index 265d6a6583bc..29e67a80fb20 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -1643,7 +1643,9 @@ static int ssif_probe(struct i2c_client *client, const struct i2c_device_id *id)
 
  out:
         if (rv) {
-                addr_info->client = NULL;
+                if (addr_info)
+                        addr_info->client = NULL;
+
                 dev_err(&client->dev, "Unable to start IPMI SSIF: %d\n", rv);
                 kfree(ssif_info);
         }