linux-kernel - [PATCH 3/5] mm/mseal: small cleanups

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: <4df6b55c407b5e6890429d4d7cc39e8f28948975.1752497324.git.lorenzo.stoakes@oracle.com>
Date: Mon, 14 Jul 2025 14:00:38 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        David Hildenbrand <david@...hat.com>, Vlastimil Babka <vbabka@...e.cz>,
        Jann Horn <jannh@...gle.com>, Pedro Falcato <pfalcato@...e.de>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Jeff Xu <jeffxu@...omium.org>
Subject: [PATCH 3/5] mm/mseal: small cleanups

Drop the wholly unnecessary set_vma_sealed() and vma_is_sealed() helpers
which are used only once, and place VMA_ITERATOR() declarations in the
correct place.

No functional change intended.

Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
 mm/mseal.c |  9 +--------
 mm/vma.h   | 16 ++--------------
 2 files changed, 3 insertions(+), 22 deletions(-)

diff --git a/mm/mseal.c b/mm/mseal.c
index 1308e88ab184..adbcc65e9660 100644
--- a/mm/mseal.c
+++ b/mm/mseal.c
@@ -15,11 +15,6 @@
 #include <linux/sched.h>
 #include "internal.h"

-static inline void set_vma_sealed(struct vm_area_struct *vma)
-{
-	vm_flags_set(vma, VM_SEALED);
-}
-
 static int mseal_fixup(struct vma_iterator *vmi, struct vm_area_struct *vma,
 		struct vm_area_struct **prev, unsigned long start,
 		unsigned long end, vm_flags_t newflags)
@@ -36,7 +31,7 @@ static int mseal_fixup(struct vma_iterator *vmi, struct vm_area_struct *vma,
 		goto out;
 	}

-	set_vma_sealed(vma);
+	vm_flags_set(vma, VM_SEALED);
 out:
 	*prev = vma;
 	return ret;
@@ -53,7 +48,6 @@ static int check_mm_seal(unsigned long start, unsigned long end)
 {
 	struct vm_area_struct *vma;
 	unsigned long nstart = start;
-
 	VMA_ITERATOR(vmi, current->mm, start);

 	/* going through each vma to check. */
@@ -78,7 +72,6 @@ static int apply_mm_seal(unsigned long start, unsigned long end)
 {
 	unsigned long nstart;
 	struct vm_area_struct *vma, *prev;
-
 	VMA_ITERATOR(vmi, current->mm, start);

 	vma = vma_iter_load(&vmi);
diff --git a/mm/vma.h b/mm/vma.h
index 6515045ba342..d17f560cf53d 100644
--- a/mm/vma.h
+++ b/mm/vma.h
@@ -560,31 +560,19 @@ struct vm_area_struct *vma_iter_next_rewind(struct vma_iterator *vmi,
 }

 #ifdef CONFIG_64BIT
-
-static inline bool vma_is_sealed(struct vm_area_struct *vma)
-{
-	return (vma->vm_flags & VM_SEALED);
-}
-
-/*
- * check if a vma is sealed for modification.
- * return true, if modification is allowed.
- */
+/* Check if a vma is sealed for modification. */
 static inline bool can_modify_vma(struct vm_area_struct *vma)
 {
-	if (unlikely(vma_is_sealed(vma)))
+	if (unlikely(vma->vm_flags & VM_SEALED))
 		return false;

 	return true;
 }
-
 #else
-
 static inline bool can_modify_vma(struct vm_area_struct *vma)
 {
 	return true;
 }
-
 #endif

 #if defined(CONFIG_STACK_GROWSUP)
--
2.50.1