| 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
| ||
|
Date: Sat, 26 Aug 2006 19:42:24 +0200
From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
To: Andrew Morton <akpm@...l.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH RFP-V4 05/13] RFP prot support: disallow mprotect() on manyprots mappings
From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
For now we (I and Hugh) have found no agreement on which behavior to implement
here. So, at least as a stop-gap, return an error here.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@...oo.it>
---
mm/mprotect.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 638edab..401ae11 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -240,6 +240,13 @@ sys_mprotect(unsigned long start, size_t
error = -ENOMEM;
if (!vma)
goto out;
+
+ /* If a need is felt, an appropriate behaviour may be implemented for
+ * this case. We haven't agreed yet on which behavior is appropriate. */
+ error = -EACCES;
+ if (vma->vm_flags & VM_MANYPROTS)
+ goto out;
+
if (unlikely(grows & PROT_GROWSDOWN)) {
if (vma->vm_start >= end)
goto out;
Chiacchiera con i tuoi amici in tempo reale!
http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists