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Message-Id: <20210917165958.28313-1-james.morse@arm.com>
Date: Fri, 17 Sep 2021 16:59:58 +0000
From: James Morse <james.morse@....com>
To: x86@...nel.org, linux-kernel@...r.kernel.org
Cc: Fenghua Yu <fenghua.yu@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
H Peter Anvin <hpa@...or.com>,
Babu Moger <Babu.Moger@....com>,
James Morse <james.morse@....com>,
shameerali.kolothum.thodi@...wei.com,
Jamie Iles <jamie@...iainc.com>,
D Scott Phillips OS <scott@...amperecomputing.com>,
lcherian@...vell.com, bobo.shaobowang@...wei.com
Subject: [PATCH] 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>
---
This will not apply prior to v5.15-rc1, I'll provide a backport.
~s/hw_dom/d/;
---
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 4b8813bafffd..b5de5a6c115c 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;
}
--
2.30.2
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