From: Andrew Morton <akpm@linux-foundation.org>
To: Muchun Song <songmuchun@bytedance.com>
Cc: kernel test robot <lkp@intel.com>,
oe-kbuild-all@lists.linux.dev,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [linux-next:master 1977/2307] mm/hugetlb.c:3095:4: warning: array subscript -1 is below array bounds of 'struct list_head[1]'
Date: Wed, 1 Jul 2026 11:13:34 -0700 [thread overview]
Message-ID: <20260701111334.ea3759a839d3ada05e042b19@linux-foundation.org> (raw)
In-Reply-To: <CAMZfGtUtS_dqh4wNX9sAM01VaqCUMRDTxg+NgWYsRwrjp=CBWw@mail.gmail.com>
On Wed, 1 Jul 2026 22:53:28 +0800 Muchun Song <songmuchun@bytedance.com> wrote:
> On Wed, Jul 1, 2026 at 9:37 AM kernel test robot <lkp@intel.com> wrote:
> >
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head: be5c93fa674f0fc3c8f359c2143abce6bbb422e6
> > commit: f48ee682d55e3602fcc194cb93b8398f2546e53f [1977/2307] mm/hugetlb: free cross-zone bootmem gigantic pages after allocation
> > config: sparc-randconfig-r131-20260701 (https://download.01.org/0day-ci/archive/20260701/202607010945.6lDjBFTU-lkp@intel.com/config)
> > compiler: sparc64-linux-gcc (GCC) 8.5.0
Old compiler.
> > sparse: v0.6.5-rc1
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260701/202607010945.6lDjBFTU-lkp@intel.com/reproduce)
> >
> > If you fix the issue in a separate patch/commit (i.e. not just a new version of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202607010945.6lDjBFTU-lkp@intel.com/
> >
> > All warnings (new ones prefixed by >>):
> >
> > mm/hugetlb.c: In function 'alloc_bootmem_huge_page':
> > >> mm/hugetlb.c:3095:4: warning: array subscript -1 is below array bounds of 'struct list_head[1]' [-Warray-bounds]
> > list_add(&m->list, &huge_boot_pages[nid_request]);
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
>
> It seems like a false positive?
I can't reproduce this with sparc gcc-15.2.0
prev parent reply other threads:[~2026-07-01 18:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-01 1:36 [linux-next:master 1977/2307] mm/hugetlb.c:3095:4: warning: array subscript -1 is below array bounds of 'struct list_head[1]' kernel test robot
2026-07-01 14:53 ` Muchun Song
2026-07-01 18:13 ` Andrew Morton [this message]
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