+ mm-fix-error-handling-for-map_deny_write_exec.patch added to mm-hotfixes-unstable branch

+ mm-fix-error-handling-for-map_deny_write_exec.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: fix error handling for map_deny_write_exec
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-fix-error-handling-for-map_deny_write_exec.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-fix-error-handling-for-map_deny_write_exec.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: Joey Gouly <joey.gouly@arm.com>
Subject: mm: fix error handling for map_deny_write_exec
Date: Wed, 8 Mar 2023 19:04:21 +0000

Commit 4a18419f71cd ("mm/mprotect: use mmu_gather") changed 'goto out;' to
'break' in the loop.

This wasn't noticed while rebasing the MDWE patches, so fix it now.

Link: https://lkml.kernel.org/r/20230308190423.46491-3-joey.gouly@arm.com
Fixes: b507808ebce2 ("mm: implement memory-deny-write-execute as a prctl")
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Reported-by: Alexey Izbyshev <izbyshev@ispras.ru>
  Link: https://lore.kernel.org/linux-arm-kernel/8408d8901e9d7ee6b78db4c6cba04b78@ispras.ru/
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: nd <nd@arm.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/mm/mprotect.c~mm-fix-error-handling-for-map_deny_write_exec
+++ a/mm/mprotect.c
@@ -805,7 +805,7 @@ static int do_mprotect_pkey(unsigned lon
 
 		if (map_deny_write_exec(vma, newflags)) {
 			error = -EACCES;
-			goto out;
+			break;
 		}
 
 		/* Allow architectures to sanity-check the new flags */
_

Patches currently in -mm which might be from joey.gouly@arm.com are

mm-deduplicate-error-handling-for-map_deny_write_exec.patch
mm-fix-error-handling-for-map_deny_write_exec.patch