linux-kernel - [PATCH] fs/proc/task_mmu: add VM_SHADOW

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-next>] [day] [month] [year] [list]

Message-ID: <20250607060741.69902-1-wangfushuai@baidu.com>
Date: Sat, 7 Jun 2025 14:07:41 +0800
From: wangfushuai <wangfushuai@...du.com>
To: <akpm@...ux-foundation.org>, <david@...hat.com>, <andrii@...nel.org>,
	<osalvador@...e.de>, <Liam.Howlett@...cle.com>, <christophe.leroy@...roup.eu>
CC: <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
	wangfushuai <wangfushuai@...du.com>
Subject: [PATCH] fs/proc/task_mmu: add VM_SHADOW_STACK for arm64 when support GCS

The recent commit adding VM_SHADOW_STACK for arm64 GCS did not update
the /proc/[pid]/smaps display logic to show the "ss" flag for GCS pages.
This patch adds the necessary condition to display "ss" flag.

Fixes: ae80e1629aea ("mm: Define VM_SHADOW_STACK for arm64 when we support GCS")
Signed-off-by: wangfushuai <wangfushuai@...du.com>
---
 fs/proc/task_mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 27972c0749e7..c4c942cc6e72 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -991,7 +991,7 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
 #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_MINOR
 		[ilog2(VM_UFFD_MINOR)]	= "ui",
 #endif /* CONFIG_HAVE_ARCH_USERFAULTFD_MINOR */
-#ifdef CONFIG_ARCH_HAS_USER_SHADOW_STACK
+#ifdef CONFIG_ARCH_HAS_USER_SHADOW_STACK || defined(CONFIG_ARM64_GCS)
 		[ilog2(VM_SHADOW_STACK)] = "ss",
 #endif
 #if defined(CONFIG_64BIT) || defined(CONFIG_PPC32)
-- 
2.36.1