On Thu, Oct 27, 2016 at 10:02:10PM -0400, Al Viro wrote:
> ... and frankly, backporting 548acf19234d would be my preference. It's a bit
> more intrusive than needed (_ASM_EXTABLE_FAULT is used only in
> memcpy_mcsafe(),
> which is used only by pmem and it's the only reason for passing the trap
>
On Fri, Oct 28, 2016 at 08:49:58PM +0100, Al Viro wrote:
> On Fri, Oct 28, 2016 at 11:21:24AM -0700, Linus Torvalds wrote:
>
> > End result: either commit 1c109fabbd51 shouldn't be backported (it's
> > really not that important - if people properly check the exception
> > error results it shouldn'
On Fri, Oct 28, 2016 at 11:21:24AM -0700, Linus Torvalds wrote:
> End result: either commit 1c109fabbd51 shouldn't be backported (it's
> really not that important - if people properly check the exception
> error results it shouldn't matter), or you need to also backport
> 548acf19234d as Al sugges
On Fri, Oct 28, 2016 at 12:40:33PM -0400, Joe Korty wrote:
> Backporting 548acf19234d to 4.1.35 does indeed fix the
> issue. However, it is not clear to my _why_ it works,
> so it might be better that someone else push the backport
> to stable.
Because the trick used in fixup_exception() prior t
rea
On Fri, Oct 28, 2016 at 9:40 AM, Joe Korty wrote:
>
> Backporting 548acf19234d to 4.1.35 does indeed fix the
> issue. However, it is not clear to my _why_ it works,
> so it might be better that someone else push the backport
> to stable.
The problem is that the old _ASM_EXTABLE_EXT hackery
On Fri, Oct 28, 2016 at 01:03:55AM +0100, Al Viro wrote:
> On Thu, Oct 27, 2016 at 03:32:10PM -0400, Joe Korty wrote:
[oops in 4.1.35, bisected to 319fe1151940]
> > The following test program can be used to trigger the problem:
> >
> > /* gcc -m32 c.c -o c */
> > #define _GNU_SOURCE
> > #include
On Thu, Oct 27, 2016 at 03:32:10PM -0400, Joe Korty wrote:
> Hi Al,
> I don't know if this is worth fixing or not, but I thought
> I would mention it in case it was.
>
> A git bisect search shows that the commit:
>
> commit 319fe11519401e8a5db191a0a93aa2c1d7bb59f4
> Author: Al Viro
> Date:
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