linux-kernel - [PATCH 2/4] x86/smpboot: Return directly after a failed kmalloc

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Date:   Mon, 5 Sep 2016 10:11:21 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     x86@...nel.org, Andi Kleen <ak@...ux.intel.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Borislav Petkov <bp@...e.de>, "H. Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
        Jürgen Groß <jgross@...e.com>,
        Len Brown <len.brown@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH 2/4] x86/smpboot: Return directly after a failed
 kmalloc_array()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 5 Sep 2016 08:48:32 +0200

Return directly after a memory allocation failed at the beginning.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 arch/x86/kernel/smpboot.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 36cf27e..2ce06ef 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -352,6 +352,8 @@ static void __init smp_init_package_map(void)
 	physical_to_logical_pkg = kmalloc_array(max_physical_pkg_id,
 						sizeof(*physical_to_logical_pkg),
 						GFP_KERNEL);
+	if (!physical_to_logical_pkg)
+		return;
 	memset(physical_to_logical_pkg,
 	       0xff,
 	       sizeof(*physical_to_logical_pkg) * max_physical_pkg_id);
-- 
2.9.3