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ipmi: kcs_bmc: handle devm_kasprintf() failure case

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[ Upstream commit 42c7c6ef1e ]

devm_kasprintf() may return NULL if internal allocation failed so this
assignment is not safe. Moved the error exit path and added the !NULL
which then allows the devres manager to take care of cleanup.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: cd2315d471 ("ipmi: kcs_bmc: don't change device name")
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nicholas Mc Guire 2018-11-21 16:08:25 +01:00 committed by Greg Kroah-Hartman
parent a1358d487d
commit 7bfcb0230e
1 changed files with 3 additions and 2 deletions
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5
drivers/char/ipmi/kcs_bmc.c
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@ -440,12 +440,13 @@ struct kcs_bmc *kcs_bmc_alloc(struct device *dev, int sizeof_priv, u32 channel)
kcs_bmc->data_in = devm_kmalloc(dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
kcs_bmc->data_out = devm_kmalloc(dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
kcs_bmc->kbuffer = devm_kmalloc(dev, KCS_MSG_BUFSIZ, GFP_KERNEL);
if (!kcs_bmc->data_in || !kcs_bmc->data_out || !kcs_bmc->kbuffer)
return NULL;
kcs_bmc->miscdev.minor = MISC_DYNAMIC_MINOR;
kcs_bmc->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "%s%u",
DEVICE_NAME, channel);
if (!kcs_bmc->data_in || !kcs_bmc->data_out || !kcs_bmc->kbuffer ||
!kcs_bmc->miscdev.name)
return NULL;
kcs_bmc->miscdev.fops = &kcs_bmc_fops;
return kcs_bmc;