Yeah, I'd like to opt the nx-emu tree out for now. I may remove it
soon, since it's no longer useful to me any more. I've mostly just
been keeping it around for historical sake.
Thanks!
-Kees
On Wed, Sep 19, 2012 at 5:21 PM, Fengguang Wu <fengguang.wu@xxxxxxxxx> wrote:
> Hi Kees,
>
> On Wed, Sep 19, 2012 at 05:15:46PM -0700, Kees Cook wrote:
>> Hi,
>>
>> Er, while this is technically Ingo's code, I've been maintaining it in
>> my tree for a few years now. I wasn't expecting anyone else to be
>> running live tests on it, though. Are you just building all the trees
>> on kernel.org?
>
> Yes, I've been adding git trees to my test pool (over 230 trees now).
> If you'd like to opt out (either the whole tree or some branches),
> please tell me.
>
> Thanks,
> Fengguang
>
>> On Wed, Sep 19, 2012 at 5:10 PM, Fengguang Wu <fengguang.wu@xxxxxxxxx> wrote:
>> >
>> > Hi Ingo,
>> >
>> > FYI, there are new compile warnings show up in
>> >
>> > tree: git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git nx-emu
>> > head: ba8b1415b80d18a464d91cf39a08c5ab60c65b30
>> > commit: 60e9398e64beabb73af6fb0a15cc0bd52aeedbc6 [1/2] i386: NX emulation
>> > config: i386-randconfig-b041 (attached as .config)
>> >
>> > All error/warnings:
>> >
>> > arch/x86/kernel/traps.c: In function 'check_lazy_exec_limit':
>> > arch/x86/kernel/traps.c:145:3: warning: passing argument 1 of 'get_gate_vma' from incompatible pointer type [enabled by default]
>> > In file included from arch/x86/kernel/traps.c:34:0:
>> > include/linux/mm.h:1579:31: note: expected 'struct mm_struct *' but argument is of type 'struct task_struct *'
>> > --
>> > mm/util.c: In function '__vma_link_list':
>> > mm/util.c:243:3: error: implicit declaration of function 'arch_add_exec_range' [-Werror=implicit-function-declaration]
>> > cc1: some warnings being treated as errors
>> > --
>> > mm/mprotect.c: In function 'mprotect_fixup':
>> > mm/mprotect.c:156:29: warning: unused variable 'old_end' [-Wunused-variable]
>> >
>> > vim +145 arch/x86/kernel/traps.c
>> > 135 if (current->mm == NULL)
>> > 136 return 0;
>> > 137
>> > 138 limit = -1UL;
>> > 139 if (current->mm->context.exec_limit != -1UL) {
>> > 140 limit = PAGE_SIZE;
>> > 141 spin_lock(¤t->mm->page_table_lock);
>> > 142 for (vma = current->mm->mmap; vma; vma = vma->vm_next)
>> > 143 if ((vma->vm_flags & VM_EXEC) && (vma->vm_end > limit))
>> > 144 limit = vma->vm_end;
>> > > 145 vma = get_gate_vma(current);
>> > 146 if (vma && (vma->vm_flags & VM_EXEC) && (vma->vm_end > limit))
>> > 147 limit = vma->vm_end;
>> > 148 spin_unlock(¤t->mm->page_table_lock);
>> > 149 if (limit >= TASK_SIZE)
>> > 150 limit = -1UL;
>> > 151 current->mm->context.exec_limit = limit;
>> > 152 }
>> > 153 set_user_cs(¤t->mm->context.user_cs, limit);
>> > 154
>> > 155 desc1 = ¤t->mm->context.user_cs;
>> >
>> > ---
>> > 0-DAY kernel build testing backend Open Source Technology Centre
>> > Fengguang Wu, Yuanhan Liu Intel Corporation
>>
>>
>>
>> --
>> Kees Cook
>> Chrome OS Security
--
Kees Cook
Chrome OS Security
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