lkml.org 
[lkml]   [2022]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 6.1rc1: NFS memcpy warning on mount
On Sun, Oct 16, 2022 at 10:58:21PM -0400, Dave Jones wrote:
> [ 19.617475] memcpy: detected field-spanning write (size 28) of single field "request.sap" at fs/nfs/super.c:857 (size 18446744073709551615)

I've sent this, which should fix it:
https://lore.kernel.org/lkml/20221017043107.never.457-kees@kernel.org/

However, the -1 size tells me something has gone slightly wrong with the
runtime warning, as it _should_ be ignoring destinations with "unknown"
size -- in this case, struct sockaddr has a trailing array, which is
treated (currently) as a fake flexible array, so __builtin_object_size()
is reporting the "-1". But with the coming -fstrict-flex-arrays, this
will need fixing anyway. I will re-check the runtime warning logic...

--
Kees Cook

\
 
 \ /
  Last update: 2022-10-17 06:58    [W:0.097 / U:1.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site