linux-kernel - [PATCH] ARM/mvebu: Fix possible null dereference in armada_375_380_coherency

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Date:   Mon, 15 Nov 2021 10:51:54 +0000
From:   yuuoniy <linmq006@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linmq006@...il.com, Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM/mvebu: Fix possible null dereference in armada_375_380_coherency_init

Prevent potential when access p->name after unsuccessful allocation.
Signed-off-by: yuuoniy <linmq006@...il.com>
---
 arch/arm/mach-mvebu/coherency.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index 49e3c8d20c2f..4fdb1fae63c5 100644
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c
@@ -194,6 +194,8 @@ static void __init armada_375_380_coherency_init(struct device_node *np)
 		struct property *p;
 
 		p = kzalloc(sizeof(*p), GFP_KERNEL);
+		if (!p)
+			return;
 		p->name = kstrdup("arm,io-coherent", GFP_KERNEL);
 		of_add_property(cache_dn, p);
 	}
-- 
2.17.1