linux-kernel - [PATCH 5.10 025/103] x86/resctrl: Free the ctrlval arrays when domain_setup_mon

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Date:   Mon, 18 Oct 2021 15:24:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, James Morse <james.morse@....com>,
        Borislav Petkov <bp@...e.de>,
        Reinette Chatre <reinette.chatre@...el.com>
Subject: [PATCH 5.10 025/103] x86/resctrl: Free the ctrlval arrays when domain_setup_mon_state() fails

From: James Morse <james.morse@....com>

commit 64e87d4bd3201bf8a4685083ee4daf5c0d001452 upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/kernel/cpu/resctrl/core.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -590,6 +590,8 @@ static void domain_add_cpu(int cpu, stru
 	}
 
 	if (r->mon_capable && domain_setup_mon_state(r, d)) {
+		kfree(d->ctrl_val);
+		kfree(d->mbps_val);
 		kfree(d);
 		return;
 	}