linux-kernel - Re: gcc-8: mm/swapfile.c:863:40: error: array subscript 1 is above array bounds of 'struct list

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Message-ID: <CA+G9fYtd1Hw9YLpceUAwwC+UytVQVXOET4gmGT9jiCgHa+WexQ@mail.gmail.com>
Date: Mon, 19 Aug 2024 15:45:47 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Chris Li <chrisl@...nel.org>, linux-mm <linux-mm@...ck.org>, 
	open list <linux-kernel@...r.kernel.org>, lkft-triage@...ts.linaro.org, 
	Linux Regressions <regressions@...ts.linux.dev>
Cc: Kairui Song <kasong@...cent.com>, Barry Song <21cnbao@...il.com>, 
	"Huang, Ying" <ying.huang@...el.com>, Hugh Dickins <hughd@...gle.com>, 
	Kalesh Singh <kaleshsingh@...gle.com>, Ryan Roberts <ryan.roberts@....com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Anders Roxell <anders.roxell@...aro.org>
Subject: Re: gcc-8: mm/swapfile.c:863:40: error: array subscript 1 is above
 array bounds of 'struct list_head[1]' [-Werror=array-bounds]

On Mon, 19 Aug 2024 at 13:58, Naresh Kamboju <naresh.kamboju@...aro.org> wrote:
>
> The x86 builds failed with gcc-8 due to following build warnings / errors on
> Linux next-20240802 to next-20240819.
>
> x86_64 defconfig gcc-8 build failed
> x86_64 defconfig gcc-13 build pass
>
> First seen on the next-20240802 tag.
>
>   GOOD: next-20240730
>   BAD:  next-20240802

Anders bisected this and found the first bad commit id as,
aded4352f648 ("mm: swap: separate SSD allocation from
scan_swap_map_slots()") first faulty one

- Naresh