From: Kunwu Chan <chentao@kylinos.cn>
Date: Mon, 27 Nov 2023 03:07:55 +0000 (+0800)
Subject: powerpc/powernv: Add a null pointer check in opal_event_init()
X-Git-Tag: v6.7.2~624
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e08c2e275fa1874de945b87093f925997722ee42;p=thirdparty%2Fkernel%2Fstable.git

powerpc/powernv: Add a null pointer check in opal_event_init()

[ Upstream commit 8649829a1dd25199bbf557b2621cedb4bf9b3050 ]

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@kylinos.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231127030755.1546750-1-chentao@kylinos.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/arch/powerpc/platforms/powernv/opal-irqchip.c b/arch/powerpc/platforms/powernv/opal-irqchip.c
index f9a7001dacb7a..56a1f7ce78d2c 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);