linux-kernel - Re: UBSAN: Undefined behaviour in mm/sparse.c:81:17

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Message-ID: <20171107084045.clzrn32pvsw4jthi@node.shutemov.name>
Date:   Tue, 7 Nov 2017 11:40:45 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     linux-mm@...ck.org, kirill.shutemov@...ux.intel.com,
        akpm@...ux-foundation.org, mhocko@...e.com, vbabka@...e.cz,
        yasu.isimatu@...il.com, richard.weiyang@...il.com,
        gregkh@...uxfoundation.org, dave.hansen@...ux.intel.com,
        linux-kernel@...r.kernel.org
Subject: Re: UBSAN: Undefined behaviour in mm/sparse.c:81:17

On Mon, Nov 06, 2017 at 08:27:59PM +0100, Corentin Labbe wrote:
> Hello
> 
> Disabling UBSAN, does not change anything (NULL ptr dereference).
> Reverting 83e3c48729d9ebb7af5a31a504f3fd6aff0348c4 ("mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y") made the boot progress further.
> 
> Regards
> 
> PS: I have added more "TO" people according to get_maintainer.pl mm/sparse.c
> 

See

http://lkml.kernel.org/r/20171107083337.89952-1-kirill.shutemov@linux.intel.com

-- 
 Kirill A. Shutemov