linux-kernel - Re: linux-next: Tree for Jan 13 (UBSAN: invalid-load in ../mm/swap.c:996:11)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 13 Jan 2022 13:26:48 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: linux-next: Tree for Jan 13 (UBSAN: invalid-load in
 ../mm/swap.c:996:11)



On 1/13/22 12:47, Matthew Wilcox wrote:
> On Thu, Jan 13, 2022 at 12:12:52PM -0800, Randy Dunlap wrote:
>> [    1.561983] UBSAN: invalid-load in ../mm/swap.c:996:11
>> [    1.561986] load of value 221 is not a valid value for type '_Bool'
> 
> Ooh.  This one's mine.  Randy, does it repeat easily?  This should
> fix it:

Yes, 100% of the time (for N = 3).

Reported-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Randy Dunlap <rdunlap@...radead.org>

Fixed 100% of the time (for N = 3).

Thanks.

> diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h
> index dda8d5868c81..67b1246f136b 100644
> --- a/include/linux/pagevec.h
> +++ b/include/linux/pagevec.h
> @@ -111,6 +111,7 @@ static_assert(offsetof(struct pagevec, pages) ==
>  static inline void folio_batch_init(struct folio_batch *fbatch)
>  {
>  	fbatch->nr = 0;
> +	fbatch->percpu_pvec_drained = false;
>  }
>  
>  static inline unsigned int folio_batch_count(struct folio_batch *fbatch)
> 


-- 
~Randy