Re: 2.6.23 regression: accessing invalid mmap'ed memory from gdb causes unkillable spinning

[Linus Torvalds <torvalds@linux-foundation.org>]

On Wed, 31 Oct 2007, Nick Piggin wrote:
> 
> No that would be great. Fingers crossed it won't cause any problems.

I actually doubt it will cause problems.

We made much bigger changes to ptrace support when we disallowed writing 
to read-only shared memory areas (we used to do the magic per-page COW 
thing).

But if people have test-cases for ptrace and/or other magical users of 
access_vm_pages() (things like core-dumping comes to mind - although I 
think we don't dump pure file mappings at all, do we?) it would certainly 
be good to run any such tests on the current -git tree...

		Linus
-
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/