Messages in this thread | | | Date | Wed, 4 Nov 2015 11:26:12 -0800 | Subject | Re: [GIT PULL] x86/mm changes for v4.4 | From | Linus Torvalds <> |
| |
On Tue, Nov 3, 2015 at 3:16 AM, Ingo Molnar <mingo@kernel.org> wrote: > > The new CONFIG_DEBUG_WX=y warning is marked default-y if CONFIG_DEBUG_RODATA=y is > already eanbled, as a special exception, as these bugs are hard to notice and this > check already found several live bugs.
So this seems to be not very useful.
... Freeing unused kernel memory: 1068K (ffffffff8bcc0000 - ffffffff8bdcb000) Write protecting the kernel read-only data: 12288k Freeing unused kernel memory: 1944K (ffff88000b61a000 - ffff88000b800000) Freeing unused kernel memory: 1372K (ffff88000baa9000 - ffff88000bc00000) ------------[ cut here ]------------ WARNING: CPU: 7 PID: 1 at arch/x86/mm/dump_pagetables.c:225 note_page+0x5dc/0x780() x86/mm: Found insecure W+X mapping at address ffff88000005f000/0xffff88000005f000 ... x86/mm: Checked W+X mappings: FAILED, 165660 W+X pages found. ...
because it doesn't seem to give you any idea where to look for the issue. Those 165660 pages come out to 647MB. Odd number.
Is this *supposed* to come out clean?
Linus
| |