From 0a2d681b7292c22cbff24e63b484efc09d2f0562 Mon Sep 17 00:00:00 2001 From: Jing Zhang Date: Tue, 22 Oct 2024 03:42:26 +0000 Subject: [PATCH] drivers/perf: Fix ali_drw_pmu driver interrupt status clearing mainline inclusion from mainline-v6.12-rc1 commit a3dd920977dccc453c550260c4b7605b280b79c3 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYQRS CVE: CVE-2024-47731 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a3dd920977dccc453c550260c4b7605b280b79c3 -------------------------------- The alibaba_uncore_pmu driver forgot to clear all interrupt status in the interrupt processing function. After the PMU counter overflow interrupt occurred, an interrupt storm occurred, causing the system to hang. Therefore, clear the correct interrupt status in the interrupt handling function to fix it. Fixes: cf7b61073e45 ("drivers/perf: add DDR Sub-System Driveway PMU driver for Yitian 710 SoC") Signed-off-by: Jing Zhang Reviewed-by: Shuai Xue Acked-by: Mark Rutland Link: https://lore.kernel.org/r/1724297611-20686-1-git-send-email-renyu.zj@linux.alibaba.com Signed-off-by: Will Deacon Signed-off-by: Luo Gengkun --- drivers/perf/alibaba_uncore_drw_pmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/perf/alibaba_uncore_drw_pmu.c b/drivers/perf/alibaba_uncore_drw_pmu.c index 19d459a36be5..818ce4424d34 100644 --- a/drivers/perf/alibaba_uncore_drw_pmu.c +++ b/drivers/perf/alibaba_uncore_drw_pmu.c @@ -408,7 +408,7 @@ static irqreturn_t ali_drw_pmu_isr(int irq_num, void *data) } /* clear common counter intr status */ - clr_status = FIELD_PREP(ALI_DRW_PMCOM_CNT_OV_INTR_MASK, 1); + clr_status = FIELD_PREP(ALI_DRW_PMCOM_CNT_OV_INTR_MASK, status); writel(clr_status, drw_pmu->cfg_base + ALI_DRW_PMU_OV_INTR_CLR); } -- Gitee