From 33c1c6d8a28a2761ac74b0380b2563cf546c2a3a Mon Sep 17 00:00:00 2001 From: Guangshuo Li Date: Tue, 23 Sep 2025 21:32:35 +0800 Subject: [PATCH] powerpc/smp: Add check for kcalloc() failure in parse_thread_groups() As kcalloc() may fail, check its return value to avoid a NULL pointer dereference when passing it to of_property_read_u32_array(). Fixes: 790a1662d3a26 ("powerpc/smp: Parse ibm,thread-groups with multiple properties") Cc: stable@vger.kernel.org Reviewed-by: Christophe Leroy Signed-off-by: Guangshuo Li Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250923133235.1862108-1-lgs201920130244@gmail.com --- arch/powerpc/kernel/smp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 292fee8809bc8..cad3358fa4c35 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -822,6 +822,8 @@ static int parse_thread_groups(struct device_node *dn, count = of_property_count_u32_elems(dn, "ibm,thread-groups"); thread_group_array = kcalloc(count, sizeof(u32), GFP_KERNEL); + if (!thread_group_array) + return -ENOMEM; ret = of_property_read_u32_array(dn, "ibm,thread-groups", thread_group_array, count); if (ret) -- 2.47.3