linux-kernel - [PATCH v2 6/6] mm: Remove can_modify

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: <20240807211309.2729719-7-pedro.falcato@gmail.com>
Date: Wed,  7 Aug 2024 22:13:09 +0100
From: Pedro Falcato <pedro.falcato@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	oliver.sang@...el.com,
	torvalds@...ux-foundation.org,
	jeffxu@...gle.com,
	Michael Ellerman <mpe@...erman.id.au>,
	Pedro Falcato <pedro.falcato@...il.com>
Subject: [PATCH v2 6/6] mm: Remove can_modify_mm()

With no more users in the tree, we can finally remove can_modify_mm().

Signed-off-by: Pedro Falcato <pedro.falcato@...il.com>
---
 mm/internal.h |  8 --------
 mm/mseal.c    | 21 ---------------------
 2 files changed, 29 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index 3f9a5c17626..980b613b98c 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1371,8 +1371,6 @@ static inline bool can_modify_vma(struct vm_area_struct *vma)
 }
 
 
-bool can_modify_mm(struct mm_struct *mm, unsigned long start,
-		unsigned long end);
 bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior);
 #else
 static inline int can_do_mseal(unsigned long flags)
@@ -1380,12 +1378,6 @@ static inline int can_do_mseal(unsigned long flags)
 	return -EPERM;
 }
 
-static inline bool can_modify_mm(struct mm_struct *mm, unsigned long start,
-		unsigned long end)
-{
-	return true;
-}
-
 static inline bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior)
 {
 	return true;
diff --git a/mm/mseal.c b/mm/mseal.c
index 6559242dd05..ef4b8a556f7 100644
--- a/mm/mseal.c
+++ b/mm/mseal.c
@@ -45,27 +45,6 @@ static bool is_ro_anon(struct vm_area_struct *vma)
 	return false;
 }
 
-/*
- * Check if the vmas of a memory range are allowed to be modified.
- * the memory ranger can have a gap (unallocated memory).
- * return true, if it is allowed.
- */
-bool can_modify_mm(struct mm_struct *mm, unsigned long start, unsigned long end)
-{
-	struct vm_area_struct *vma;
-
-	VMA_ITERATOR(vmi, mm, start);
-
-	/* going through each vma to check. */
-	for_each_vma_range(vmi, vma, end) {
-		if (unlikely(!can_modify_vma(vma)))
-			return false;
-	}
-
-	/* Allow by default. */
-	return true;
-}
-
 /*
  * Check if a vma is allowed to be modified by madvise.
  */
-- 
2.46.0