linux-kernel - [PATCH v5 2/2] powerpc/powernv: Add NULL check after kzalloc in opal_add_one

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Message-Id: <20200406125242.4973-3-hqjagain@gmail.com>
Date:   Mon,  6 Apr 2020 20:52:42 +0800
From:   Qiujun Huang <hqjagain@...il.com>
To:     benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au,
        oohall@...il.com
Cc:     tglx@...utronix.de, Markus.Elfring@....de, christophe.leroy@....fr,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Qiujun Huang <hqjagain@...il.com>
Subject: [PATCH v5 2/2] powerpc/powernv: Add NULL check after kzalloc in opal_add_one_export

Here needs a NULL check, as kzalloc may fail returning NULL.

Issue was found by coccinelle.
Generated by: scripts/coccinelle/null/kmerr.cocci

Signed-off-by: Qiujun Huang <hqjagain@...il.com>
Reviewed-by: Oliver O'Halloran <oohall@...il.com>
---
 arch/powerpc/platforms/powernv/opal.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 71af1cbc6334..908d749bcef5 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -811,6 +811,9 @@ static int opal_add_one_export(struct kobject *parent, const char *export_name,
 		return rc;
 
 	attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+	if (!attr)
+		return -ENOMEM;
+
 	name = kstrdup(export_name, GFP_KERNEL);
 	if (!name) {
 		rc = -ENOMEM;
-- 
2.17.1