linux-kernel - [tip: x86/urgent] x86/resctrl: Free the ctrlval arrays when domain_setup_mon

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Date:   Wed, 06 Oct 2021 17:39:00 -0000
From:   "tip-bot2 for James Morse" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     James Morse <james.morse@....com>, Borislav Petkov <bp@...e.de>,
        Reinette Chatre <reinette.chatre@...el.com>,
        <stable@...r.kernel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/urgent] x86/resctrl: Free the ctrlval arrays when
 domain_setup_mon_state() fails

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     64e87d4bd3201bf8a4685083ee4daf5c0d001452
Gitweb:        https://git.kernel.org/tip/64e87d4bd3201bf8a4685083ee4daf5c0d001452
Author:        James Morse <james.morse@....com>
AuthorDate:    Fri, 17 Sep 2021 16:59:58 
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Wed, 06 Oct 2021 18:45:21 +02:00

x86/resctrl: Free the ctrlval arrays when domain_setup_mon_state() fails

domain_add_cpu() is called whenever a CPU is brought online. The
earlier call to domain_setup_ctrlval() allocates the control value
arrays.

If domain_setup_mon_state() fails, the control value arrays are not
freed.

Add the missing kfree() calls.

Fixes: 1bd2a63b4f0de ("x86/intel_rdt/mba_sc: Add initialization support")
Fixes: edf6fa1c4a951 ("x86/intel_rdt/cqm: Add RMID (Resource monitoring ID) management")
Signed-off-by: James Morse <james.morse@....com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Acked-by: Reinette Chatre <reinette.chatre@...el.com>
Cc: <stable@...r.kernel.org>
Link: https://lkml.kernel.org/r/20210917165958.28313-1-james.morse@arm.com
---
 arch/x86/kernel/cpu/resctrl/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 4b8813b..b5de5a6 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -532,6 +532,8 @@ static void domain_add_cpu(int cpu, struct rdt_resource *r)
 	}
 
 	if (r->mon_capable && domain_setup_mon_state(r, d)) {
+		kfree(hw_dom->ctrl_val);
+		kfree(hw_dom->mbps_val);
 		kfree(d);
 		return;
 	}