On Mon, Oct 05, 2020 at 03:30:43AM +0200, Jann Horn wrote:
> But another place where lockdep asserts should be added is find_vma();
> there are currently several architectures that sometimes improperly
> call that with no lock held:
Yes, I've seen several cases of this mis-use in drivers too
Jaso
On Sat, Oct 3, 2020 at 11:30 PM Michel Lespinasse wrote:
> Unrelated to the above: copy_from_user and copy_to_user should not be
> called with mmap_lock held; it may be worth adding these assertions
> too (probably in separate patches) ?
We already have that: All (hopefully?) the userspace access
On Fri, Oct 2, 2020 at 9:33 AM Jann Horn wrote:
> On Fri, Oct 2, 2020 at 11:18 AM Michel Lespinasse wrote:
> > On Thu, Oct 1, 2020 at 6:25 PM Jann Horn wrote:
> > > Until now, the mmap lock of the nascent mm was ordered inside the mmap
> > > lock
> > > of the old mm (in dup_mmap() and in UML's
On Fri, Oct 2, 2020 at 11:18 AM Michel Lespinasse wrote:
> On Thu, Oct 1, 2020 at 6:25 PM Jann Horn wrote:
> > Until now, the mmap lock of the nascent mm was ordered inside the mmap lock
> > of the old mm (in dup_mmap() and in UML's activate_mm()).
> > A following patch will change the exec path
On Fri, Oct 02, 2020 at 02:17:49AM -0700, Michel Lespinasse wrote:
> Also FYI I was going to play with these patches a bit to help answer
> these questions on my own, but wasn't able to easily apply them as
> they came lightly mangled (whitespace issues) when I saved them.
Me too
It seems OK, you
On Thu, Oct 1, 2020 at 6:25 PM Jann Horn wrote:
> Until now, the mmap lock of the nascent mm was ordered inside the mmap lock
> of the old mm (in dup_mmap() and in UML's activate_mm()).
> A following patch will change the exec path to very broadly lock the
> nascent mm, but fine-grained locking sh
Until now, the mmap lock of the nascent mm was ordered inside the mmap lock
of the old mm (in dup_mmap() and in UML's activate_mm()).
A following patch will change the exec path to very broadly lock the
nascent mm, but fine-grained locking should still work at the same time for
the new mm.
To do th
7 matches
Mail list logo
