* Oleg Nesterov wrote:
> On 11/22, Oleg Nesterov wrote:
> > On 11/22, Andrea Parri wrote:
> > >
> > > Commit 142b18ddc8143 ("uprobes: Fix handle_swbp() vs unregister() +
> > > register() race") added the UPROBE_COPY_INSN flag, and corresponding
> > > smp_wmb() and smp_rmb() memory barriers, to
On Thu, Nov 22, 2018 at 05:27:09PM +0100, Oleg Nesterov wrote:
> On 11/22, Oleg Nesterov wrote:
> > On 11/22, Andrea Parri wrote:
> > >
> > > Commit 142b18ddc8143 ("uprobes: Fix handle_swbp() vs unregister() +
> > > register() race") added the UPROBE_COPY_INSN flag, and corresponding
> > > smp_wmb(
On 11/22, Oleg Nesterov wrote:
> On 11/22, Andrea Parri wrote:
> >
> > Commit 142b18ddc8143 ("uprobes: Fix handle_swbp() vs unregister() +
> > register() race") added the UPROBE_COPY_INSN flag, and corresponding
> > smp_wmb() and smp_rmb() memory barriers, to ensure that handle_swbp()
> > uses full
On 11/22, Andrea Parri wrote:
>
> Commit 142b18ddc8143 ("uprobes: Fix handle_swbp() vs unregister() +
> register() race") added the UPROBE_COPY_INSN flag, and corresponding
> smp_wmb() and smp_rmb() memory barriers, to ensure that handle_swbp()
> uses fully-initialized uprobes only.
>
> However, t
Commit 142b18ddc8143 ("uprobes: Fix handle_swbp() vs unregister() +
register() race") added the UPROBE_COPY_INSN flag, and corresponding
smp_wmb() and smp_rmb() memory barriers, to ensure that handle_swbp()
uses fully-initialized uprobes only.
However, the smp_rmb() is mis-placed: this barrier sho
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