From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo 'Blaisorblade' Giarrusso Subject: [PATCH RFP-V4 05/13] RFP prot support: disallow mprotect() on manyprots mappings Date: Sat, 26 Aug 2006 19:42:24 +0200 Message-Id: <20060826174224.14790.16609.stgit@memento.home.lan> In-Reply-To: <200608261933.36574.blaisorblade@yahoo.it> References: <200608261933.36574.blaisorblade@yahoo.it> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org From: Paolo 'Blaisorblade' Giarrusso Return-Path: To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: 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 --- 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org