linux-kernel - [PATCH AUTOSEL 4.9 086/251] clocksource/drivers/exynos_mct: Fix error path in timer resources initialization

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200116173641.22137-46-sashal@kernel.org>
Date:   Thu, 16 Jan 2020 12:33:55 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Subject: [PATCH AUTOSEL 4.9 086/251] clocksource/drivers/exynos_mct: Fix error path in timer resources initialization

From: Marek Szyprowski <m.szyprowski@...sung.com>

[ Upstream commit b9307420196009cdf18bad55e762ac49fb9a80f4 ]

While freeing interrupt handlers in error path, don't assume that all
requested interrupts are per-processor interrupts and properly release
standard interrupts too.

Reported-by: Krzysztof Kozlowski <krzk@...nel.org>
Fixes: 56a94f13919c ("clocksource: exynos_mct: Avoid blocking calls in the cpu hotplug notifier")
Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clocksource/exynos_mct.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index d32248e2ceab..ae3cbaeffd9c 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -563,7 +563,19 @@ static int __init exynos4_timer_resources(struct device_node *np, void __iomem *
 	return 0;
 
 out_irq:
-	free_percpu_irq(mct_irqs[MCT_L0_IRQ], &percpu_mct_tick);
+	if (mct_int_type == MCT_INT_PPI) {
+		free_percpu_irq(mct_irqs[MCT_L0_IRQ], &percpu_mct_tick);
+	} else {
+		for_each_possible_cpu(cpu) {
+			struct mct_clock_event_device *pcpu_mevt =
+				per_cpu_ptr(&percpu_mct_tick, cpu);
+
+			if (pcpu_mevt->evt.irq != -1) {
+				free_irq(pcpu_mevt->evt.irq, pcpu_mevt);
+				pcpu_mevt->evt.irq = -1;
+			}
+		}
+	}
 	return err;
 }
 
-- 
2.20.1