From: Mike Rapoport <rppt@kernel.org>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Dave Hansen <dave.hansen@intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
linux-tip-commits@vger.kernel.org,
Juergen Gross <jgross@suse.com>,
"Lorenzo Stoakes (ARM)" <ljs@kernel.org>,
syzbot@syzkaller.appspotmail.com, Atish Patra <atishp@meta.com>,
Nikunj A Dadhania <nikunj@amd.com>,
stable@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [tip: x86/urgent] x86/mm/pat: Fix effective RW computation in lookup_address_in_pgd_attr()
Date: Tue, 8 Sep 2026 12:29:17 +0300 [thread overview]
Message-ID: <ap_VbQE97wgy9iZO@kernel.org> (raw)
In-Reply-To: <20260907222813.GB1619741@ax162>
Hi Nathan,
On Mon, Sep 07, 2026 at 03:28:13PM -0700, Nathan Chancellor wrote:
> On Sun, Sep 06, 2026 at 12:12:54PM -0700, Dave Hansen wrote:
> > On 9/6/26 11:12, Nathan Chancellor wrote:
> > > Hmmm, I don't see a warning prior to this patch though. Do you mean that
> > > this patch is just revealing the bad behavior that you mention below?
> >
> > Yeah, "fixes" was a bad word to use.
> >
> > The W^X detection has been broken for a while. The patch you bisected to
> > fixes the W^X detection. It doesn't actually cause the issue.
>
> Ah okay, that parses way better. I assume this will be sorted out
> without further information needed from me but I am happy to test a
> patch when available.
Here:
https://lore.kernel.org/all/20260908092730.4002628-1-rppt@kernel.org/T/#u
> --
> Cheers,
> Nathan
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2026-09-08 9:29 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-13 9:01 [PATCH v2 0/5] x86/mm/pat: CPA fixes Mike Rapoport
2026-08-13 9:01 ` [PATCH v2 1/5] x86/mm/pat: acquire init_mm write lock on collapse to avoid UAF Mike Rapoport
2026-08-31 22:27 ` [tip: x86/urgent] x86/mm/pat: Acquire " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-01 6:03 ` Jiri Slaby
2026-09-01 7:10 ` Lorenzo Stoakes (ARM)
2026-09-01 23:36 ` Dave Hansen
2026-09-02 6:53 ` Lorenzo Stoakes (ARM)
2026-09-08 9:32 ` Mike Rapoport
2026-09-08 10:12 ` Lorenzo Stoakes (ARM)
2026-09-08 13:58 ` Dave Hansen
2026-09-08 15:14 ` Dave Hansen
2026-09-08 15:17 ` Vlastimil Babka (SUSE)
2026-09-08 19:59 ` Dave Hansen
2026-09-08 23:00 ` Update on CPA fixes, x86/urgent and x86/mm Dave Hansen
2026-09-09 6:40 ` Ingo Molnar
2026-09-09 6:45 ` Ingo Molnar
2026-09-02 18:33 ` [tip: x86/urgent] x86/mm/pat: Acquire init_mm write lock on collapse to avoid UAF tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-08 7:21 ` [tip: x86/mm] " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-08 22:51 ` [tip: x86/urgent] " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-09 6:44 ` tip-bot2 for Lorenzo Stoakes (ARM)
2026-08-13 9:01 ` [PATCH v2 2/5] x86/mm/pat: acquire init_mm read lock on attribute change " Mike Rapoport
2026-08-31 22:27 ` [tip: x86/urgent] x86/mm/pat: Acquire " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-01 6:05 ` Jiri Slaby
2026-09-01 7:20 ` Lorenzo Stoakes (ARM)
2026-09-01 13:46 ` Dave Hansen
2026-09-02 18:33 ` tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-08 7:21 ` [tip: x86/mm] x86/mm/pat: Acquire init_mm read lock on attribute changes " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-08 22:51 ` [tip: x86/urgent] " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-09 6:44 ` tip-bot2 for Lorenzo Stoakes (ARM)
2026-08-13 9:01 ` [PATCH v2 3/5] x86/alternative: exclude text poking against change_page_attr() Mike Rapoport
2026-08-25 9:37 ` Jiri Slaby
2026-08-31 22:27 ` [tip: x86/urgent] x86/alternative: Exclude " tip-bot2 for Pedro Falcato
2026-09-01 6:16 ` Jiri Slaby
2026-09-01 7:18 ` Lorenzo Stoakes (ARM)
2026-09-01 7:22 ` Jiri Slaby
2026-09-01 7:24 ` Lorenzo Stoakes (ARM)
2026-09-02 18:33 ` tip-bot2 for Pedro Falcato
2026-09-08 7:21 ` [tip: x86/mm] x86/alternatives: " tip-bot2 for Pedro Falcato
2026-09-08 22:51 ` [tip: x86/urgent] " tip-bot2 for Pedro Falcato
2026-09-09 6:44 ` tip-bot2 for Pedro Falcato
2026-08-13 9:01 ` [PATCH v2 4/5] x86/mm/pat: allocate split page tables as kernel page tables Mike Rapoport
2026-08-31 22:27 ` [tip: x86/urgent] x86/mm/pat: Allocate " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-02 18:33 ` tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-08 7:21 ` [tip: x86/mm] " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-08 22:51 ` [tip: x86/urgent] " tip-bot2 for Lorenzo Stoakes (ARM)
2026-09-09 6:44 ` tip-bot2 for Lorenzo Stoakes (ARM)
2026-08-13 9:01 ` [PATCH v2 5/5] x86/mm/pat: fix effective RW computation in lookup_address_in_pgd_attr() Mike Rapoport (Microsoft)
2026-08-13 9:45 ` Lorenzo Stoakes (ARM)
2026-08-31 22:27 ` [tip: x86/urgent] x86/mm/pat: Fix " tip-bot2 for Mike Rapoport (Microsoft)
2026-09-02 18:33 ` tip-bot2 for Mike Rapoport (Microsoft)
2026-09-05 4:42 ` Nathan Chancellor
2026-09-06 14:50 ` Dave Hansen
2026-09-06 18:12 ` Nathan Chancellor
2026-09-06 19:12 ` Dave Hansen
2026-09-06 19:52 ` Mike Rapoport
2026-09-07 6:46 ` Mike Rapoport
2026-09-07 22:28 ` Nathan Chancellor
2026-09-08 9:29 ` Mike Rapoport [this message]
2026-09-08 22:52 ` [tip: x86/mm] " tip-bot2 for Mike Rapoport (Microsoft)
2026-08-13 15:05 ` [PATCH v2 0/5] x86/mm/pat: CPA fixes Nikunj A. Dadhania
2026-08-13 15:07 ` Lorenzo Stoakes (ARM)
2026-08-13 15:23 ` Pedro Falcato
2026-08-13 17:13 ` Andrew Morton
2026-08-25 7:12 ` Atish Patra
2026-08-25 7:31 ` Lorenzo Stoakes (ARM)
2026-08-25 20:05 ` Atish Patra
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