+ scs-fix-a-wrong-parameter-in-__scs_magic.patch added to mm-nonmm-unstable branch

+ scs-fix-a-wrong-parameter-in-__scs_magic.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: scs: fix a wrong parameter in __scs_magic
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     scs-fix-a-wrong-parameter-in-__scs_magic.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scs-fix-a-wrong-parameter-in-__scs_magic.patch

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

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------------------------------------------------------
From: Zhichi Lin <zhichi.lin@vivo.com>
Subject: scs: fix a wrong parameter in __scs_magic
Date: Sat, 11 Oct 2025 16:22:22 +0800

__scs_magic() needs a 'void *' variable, but a 'struct task_struct *' is
given.  'task_scs(tsk)' is the starting address of the task's shadow call
stack, and '__scs_magic(task_scs(tsk))' is the end address of the task's
shadow call stack.  Here should be '__scs_magic(task_scs(tsk))'.

Link: https://lkml.kernel.org/r/20251011082222.12965-1-zhichi.lin@vivo.com
Fixes: 5bbaf9d1fcb9 ("scs: Add support for stack usage debugging")
Signed-off-by: Jiyuan Xie <xiejiyuan@vivo.com>
Signed-off-by: Zhichi Lin <zhichi.lin@vivo.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Marco Elver <elver@google.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yee Lee <yee.lee@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/scs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/scs.c~scs-fix-a-wrong-parameter-in-__scs_magic
+++ a/kernel/scs.c
@@ -135,7 +135,7 @@ static void scs_check_usage(struct task_
 	if (!IS_ENABLED(CONFIG_DEBUG_STACK_USAGE))
 		return;
 
-	for (p = task_scs(tsk); p < __scs_magic(tsk); ++p) {
+	for (p = task_scs(tsk); p < __scs_magic(task_scs(tsk)); ++p) {
 		if (!READ_ONCE_NOCHECK(*p))
 			break;
 		used += sizeof(*p);
_

Patches currently in -mm which might be from zhichi.lin@vivo.com are

scs-fix-a-wrong-parameter-in-__scs_magic.patch