+ fs-proc-kcore-reinstate-bounce-buffer-for-kcore_text-regions-fix.patch added to mm-hotfixes-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: fs/proc/kcore: correct comment
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     fs-proc-kcore-reinstate-bounce-buffer-for-kcore_text-regions-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fs-proc-kcore-reinstate-bounce-buffer-for-kcore_text-regions-fix.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Lorenzo Stoakes <lstoakes@gmail.com>
Subject: fs/proc/kcore: correct comment
Date: Tue, 1 Aug 2023 17:36:08 +0100

Correct comment to be strictly correct about reasoning.

Link: https://lkml.kernel.org/r/525a3f14-74fa-4c22-9fca-9dab4de8a0c3@lucifer.local
Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <olsajiri@gmail.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Liu Shixin <liushixin2@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/proc/kcore.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/proc/kcore.c~fs-proc-kcore-reinstate-bounce-buffer-for-kcore_text-regions-fix
+++ a/fs/proc/kcore.c
@@ -568,8 +568,8 @@ static ssize_t read_kcore_iter(struct ki
 					goto out;
 				}
 			/*
-			 * We use _copy_to_iter() to bypass usermode hardening
-			 * which would otherwise prevent this operation.
+			 * We know the bounce buffer is safe to copy from, so
+			 * use _copy_to_iter() directly.
 			 */
 			} else if (_copy_to_iter(buf, tsz, iter) != tsz) {
 				ret = -EFAULT;
_

Patches currently in -mm which might be from lstoakes@gmail.com are

fs-proc-kcore-reinstate-bounce-buffer-for-kcore_text-regions.patch
fs-proc-kcore-reinstate-bounce-buffer-for-kcore_text-regions-fix.patch