linux-kernel - [RFC PATCH 8/8] mm: Mark 'info' field of 'struct vm

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]

Message-Id: <20210114175934.13070-9-will@kernel.org>
Date:   Thu, 14 Jan 2021 17:59:34 +0000
From:   Will Deacon <will@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, linux-arm-kernel@...ts.infradead.org,
        Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Jan Kara <jack@...e.cz>, Minchan Kim <minchan@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Vinayak Menon <vinmenon@...eaurora.org>,
        Hugh Dickins <hughd@...gle.com>, kernel-team@...roid.com
Subject: [RFC PATCH 8/8] mm: Mark 'info' field of 'struct vm_fault' as 'const'

The field is only ever read after being initialised, so mark it 'const'
before somebody tries to modify it again.

Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Will Deacon <will@...nel.org>
---
 include/linux/mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index c24dd17b32c5..b45a8e075f7f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -521,7 +521,7 @@ struct vm_fault_info {
 };
 
 struct vm_fault {
-	struct vm_fault_info info;
+	const struct vm_fault_info info;
 	unsigned int flags;		/* FAULT_FLAG_xxx flags
 					 * XXX: should be in vm_fault_info */
 	pmd_t *pmd;			/* Pointer to pmd entry matching
-- 
2.30.0.284.gd98b1dd5eaa7-goog