Messages in this thread | | | From | (Alan Cox) | Subject | Re: How to read-protect a vm_area? | Date | Mon, 16 Feb 1998 20:25:14 +0000 (GMT) |
| |
> Note that this is an issue only for something that _has_ been accessible > and then has turned into PROT_NONE by using mprotect() - because if the > pages aren't there at all then the page fault handler will refuse to page > them in even when the access is done from kernel space.
As is done by Texas, Electric Fence ... It potentially stops ElectricFence detecting a syscall into an area that has been read/written to after being freed, and I think it means anyone wanting to run the texas persistent object store needs to go and download OpenBSD.
How tricky is it to handle - I agree its not a normal issue..
Alan
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu
| |