Commit fbc1400d authored by Liang He's avatar Liang He Committed by Liu Kai
Browse files

xtensa: Fix refcount leak bug in time.c 

stable inclusion
from stable-v4.19.250
commit f1eaf4ba5372ad111f687a80c67e270708e14c23
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBP2LY
CVE: CVE-2022-49682

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f1eaf4ba5372ad111f687a80c67e270708e14c23



--------------------------------

commit a0117dc9 upstream.

In calibrate_ccount(), of_find_compatible_node() will return a node
pointer with refcount incremented. We should use of_node_put() when
it is not used anymore.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarLiang He <windhl@126.com>
Message-Id: <20220617124432.4049006-1-windhl@126.com>
Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarLiu Kai <liukai284@huawei.com>
parent 8bb5e053

arch/xtensa/kernel/time.c

+1 −0
Original line number Diff line number Diff line
@@ -146,6 +146,7 @@ static void __init calibrate_ccount(void) 
	cpu = of_find_compatible_node(NULL, NULL, "cdns,xtensa-cpu");

	if (cpu) {

		clk = of_clk_get(cpu, 0);

		of_node_put(cpu);

		if (!IS_ERR(clk)) {

			ccount_freq = clk_get_rate(clk);

			return;