From a8627cda7cfffe1792c199660c2b4f03ba2bd97b Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Date: Fri, 31 Aug 2018 10:00:34 -0500
Subject: [PATCH] ipmi: Fix NULL pointer dereference in ssif_probe
Git-commit: a8627cda7cfffe1792c199660c2b4f03ba2bd97b
Patch-mainline: v4.19-rc4
References: FATE#326156
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/char/ipmi/ipmi_ssif.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
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);
}
--
2.19.2