Messages in this thread Patch in this message | | | 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 |
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From: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.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@yahoo.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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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