From d96c8a62cb421d667c71f4c4c81518a7e493e5a5 Mon Sep 17 00:00:00 2001 From: Kunwu Chan Date: Wed, 22 May 2024 16:54:13 +0800 Subject: [PATCH] powerpc/powernv: Add a null pointer check in opal_event_init() stable inclusion from stable-v4.19.306 commit 8422d179cf46889c15ceff9ede48c5bfa4e7f0b4 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9IH CVE: CVE-2023-52686 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8422d179cf46889c15ceff9ede48c5bfa4e7f0b4 -------------------------------- [ 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 Signed-off-by: Michael Ellerman Link: https://msgid.link/20231127030755.1546750-1-chentao@kylinos.cn Signed-off-by: Sasha Levin Signed-off-by: Guo Mengqi --- 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 bc97770a67db..e71f2111c8c0 100644 --- a/arch/powerpc/platforms/powernv/opal-irqchip.c +++ b/arch/powerpc/platforms/powernv/opal-irqchip.c @@ -282,6 +282,8 @@ 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); -- Gitee