The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 33c1c6d8a28a2761ac74b0380b2563cf546c2a3a Mon Sep 17 00:00:00 2001 From: Guangshuo Li <[email protected]> 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: [email protected] Reviewed-by: Christophe Leroy <[email protected]> Signed-off-by: Guangshuo Li <[email protected]> Signed-off-by: Madhavan Srinivasan <[email protected]> Link: https://patch.msgid.link/[email protected] --- 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) -- 2.51.0
