From: Peng Wu <wupeng58@huawei.com> stable inclusion from stable-v4.19.247 commit dd4be8ecfb41a29e7c4e551b4e866157ce4a3429 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBP6KO CVE: CVE-2022-49447 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 9bc72e47d4630d58a840a66a869c56b29554cfe4 ] of_find_compatible_node will increment the refcount of the returned device_node. Calling of_node_put() to avoid the refcount leak Signed-off-by: Peng Wu <wupeng58@huawei.com> Signed-off-by: Wei Xu <xuwei5@hisilicon.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Huang Xiaojia <huangxiaojia2@huawei.com> --- arch/arm/mach-hisi/platsmp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm/mach-hisi/platsmp.c b/arch/arm/mach-hisi/platsmp.c index da5689ababf7..d7fbfb6d293d 100644 --- a/arch/arm/mach-hisi/platsmp.c +++ b/arch/arm/mach-hisi/platsmp.c @@ -70,14 +70,17 @@ static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus) } ctrl_base = of_iomap(np, 0); if (!ctrl_base) { + of_node_put(np); pr_err("failed to map address\n"); return; } if (of_property_read_u32(np, "smp-offset", &offset) < 0) { + of_node_put(np); pr_err("failed to find smp-offset property\n"); return; } ctrl_base += offset; + of_node_put(np); } } @@ -163,6 +166,7 @@ static int hip01_boot_secondary(unsigned int cpu, struct task_struct *idle) if (WARN_ON(!node)) return -1; ctrl_base = of_iomap(node, 0); + of_node_put(node); /* set the secondary core boot from DDR */ remap_reg_value = readl_relaxed(ctrl_base + REG_SC_CTRL); -- 2.34.1