From 5649607a8d0b0e019a4db14aab3de1e16c3a2b4f Mon Sep 17 00:00:00 2001
From: Vaibhav Jain <vaibhav@linux.ibm.com>
Date: Wed, 22 Jan 2020 21:21:40 +0530
Subject: [PATCH] powerpc/papr_scm: Fix leaking 'bus_desc.provider_name' in
 some paths

References: FATE#327775 bsc#1142685 ltc#179509
Patch-mainline: v5.6-rc1
Git-commit: 5649607a8d0b0e019a4db14aab3de1e16c3a2b4f

String 'bus_desc.provider_name' allocated inside
papr_scm_nvdimm_init() will leaks in case call to
nvdimm_bus_register() fails or when papr_scm_remove() is called.

This minor patch ensures that 'bus_desc.provider_name' is freed in
error path for nvdimm_bus_register() as well as in papr_scm_remove().

Fixes: b5beae5e224f ("powerpc/pseries: Add driver for PAPR SCM regions")
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200122155140.120429-1-vaibhav@linux.ibm.com
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
 arch/powerpc/platforms/pseries/papr_scm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
index 8da39a9c5569..0b4467e378e5 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -323,6 +323,7 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
 	p->bus = nvdimm_bus_register(NULL, &p->bus_desc);
 	if (!p->bus) {
 		dev_err(dev, "Error creating nvdimm bus %pOF\n", p->dn);
+		kfree(p->bus_desc.provider_name);
 		return -ENXIO;
 	}
 
@@ -477,6 +478,7 @@ static int papr_scm_remove(struct platform_device *pdev)
 
 	nvdimm_bus_unregister(p->bus);
 	drc_pmem_unbind(p);
+	kfree(p->bus_desc.provider_name);
 	kfree(p);
 
 	return 0;
-- 
2.23.0