From: Kunwu Chan chentao@kylinos.cn

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=...

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[ 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 Signed-off-by: Guo Mengqi guomengqi3@huawei.com --- 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);