From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42758 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753095AbeAEWGr (ORCPT ); Fri, 5 Jan 2018 17:06:47 -0500 Subject: Patch "mm/sparse.c: wrong allocation for mem_section" has been added to the 4.14-stable tree To: bhe@redhat.com, akpm@linux-foundation.org, ats-kumagai@wm.jp.nec.com, dyoung@redhat.com, gregkh@linuxfoundation.org, kirill.shutemov@linux.intel.com, luto@amacapital.net, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Fri, 05 Jan 2018 23:06:37 +0100 Message-ID: <151518999732137@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled mm/sparse.c: wrong allocation for mem_section to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mm-sparse.c-wrong-allocation-for-mem_section.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From d09cfbbfa0f761a97687828b5afb27b56cbf2e19 Mon Sep 17 00:00:00 2001 From: Baoquan He Date: Thu, 4 Jan 2018 16:18:06 -0800 Subject: mm/sparse.c: wrong allocation for mem_section From: Baoquan He commit d09cfbbfa0f761a97687828b5afb27b56cbf2e19 upstream. In commit 83e3c48729d9 ("mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y") mem_section is allocated at runtime to save memory. It allocates the first dimension of array with sizeof(struct mem_section). It costs extra memory, should be sizeof(struct mem_section *). Fix it. Link: http://lkml.kernel.org/r/1513932498-20350-1-git-send-email-bhe@redhat.com Fixes: 83e3c48729 ("mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y") Signed-off-by: Baoquan He Tested-by: Dave Young Acked-by: Kirill A. Shutemov Cc: Kirill A. Shutemov Cc: Ingo Molnar Cc: Andy Lutomirski Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Atsushi Kumagai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- mm/sparse.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/sparse.c +++ b/mm/sparse.c @@ -211,7 +211,7 @@ void __init memory_present(int nid, unsi if (unlikely(!mem_section)) { unsigned long size, align; - size = sizeof(struct mem_section) * NR_SECTION_ROOTS; + size = sizeof(struct mem_section*) * NR_SECTION_ROOTS; align = 1 << (INTERNODE_CACHE_SHIFT); mem_section = memblock_virt_alloc(size, align); } Patches currently in stable-queue which might be from bhe@redhat.com are queue-4.14/mm-sparse.c-wrong-allocation-for-mem_section.patch