linux-kernel - [PATCH] powerpc/powernv: Add a null pointer check in opal_event

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Date:   Mon, 27 Nov 2023 11:07:55 +0800
From:   Kunwu Chan <chentao@...inos.cn>
To:     mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu,
        benh@...nel.crashing.org, rmclure@...ux.ibm.com
Cc:     kunwu.chan@...mail.com, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, Kunwu Chan <chentao@...inos.cn>
Subject: [PATCH] powerpc/powernv: Add a null pointer check in opal_event_init

kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.

Fixes: 2717a33d6074 ("powerpc/opal-irqchip: Use interrupt names if present")
Signed-off-by: Kunwu Chan <chentao@...inos.cn>
---
 arch/powerpc/platforms/powernv/opal-irqchip.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal-irqchip.c b/arch/powerpc/platforms/powernv/opal-irqchip.c
index f9a7001dacb7..56a1f7ce78d2 100644
--- a/arch/powerpc/platforms/powernv/opal-irqchip.c
+++ b/arch/powerpc/platforms/powernv/opal-irqchip.c
@@ -275,6 +275,8 @@ int __init opal_event_init(void)
 		else
 			name = kasprintf(GFP_KERNEL, "opal");
 
+		if (!name)
+			continue;
 		/* Install interrupt handler */
 		rc = request_irq(r->start, opal_interrupt, r->flags & IRQD_TRIGGER_MASK,
 				 name, NULL);
-- 
2.34.1