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ipmi: Fix NULL pointer dereference in ssif_probe

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[ Upstream commit a8627cda7cfffe1792c199660c2b4f03ba2bd97b ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gustavo A. R. Silva 2018-08-31 10:00:34 -05:00 committed by Greg Kroah-Hartman
parent efd9381d62
commit 7c492a0a12
1 changed files with 3 additions and 1 deletions
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4
drivers/char/ipmi/ipmi_ssif.c
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@ -1731,7 +1731,9 @@ 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);
}