From: Heiko Carstens <hca@linux.ibm.com>
To: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
"Jeff Xu" <jeffxu@chromium.org>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
"Kees Cook" <kees@kernel.org>,
"Thomas Weißschuh" <thomas.weissschuh@linutronix.de>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Sven Schnelle" <svens@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH mm-unstable 0/2] mseal system mappings fix + s390 enablement
Date: Tue, 11 Mar 2025 15:21:14 +0100 [thread overview]
Message-ID: <20250311142114.12846Fd5-hca@linux.ibm.com> (raw)
In-Reply-To: <6f106b28-7d5e-468f-8a94-e94357a950ee@lucifer.local>
On Tue, Mar 11, 2025 at 02:09:30PM +0000, Lorenzo Stoakes wrote:
> > When it comes to unmapping vdso: this would break user space since
> > commit df29a7440c4b ("s390/signal: switch to using vdso for sigreturn
> > and syscall restart") - there haven't been any reports.
>
> OK that seems to implicitly suggest that you're fine with sealing then?
>
> I had a quick glance and it seemed fine for s390. I mean it's _weird_ to remap
> any of this stuff so it'd be the odd one out that does it (ppc _seems_ to in
> _some_ circumstances need it, for instance).
>
> So I think we're good? :)
Yes, for s390 we are good.
next prev parent reply other threads:[~2025-03-11 14:21 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-11 12:33 [PATCH mm-unstable 0/2] mseal system mappings fix + s390 enablement Heiko Carstens
2025-03-11 12:33 ` [PATCH mm-unstable 1/2] mseal sysmap: generic vdso vvar mapping Heiko Carstens
2025-03-11 12:59 ` Thomas Weißschuh
2025-03-11 13:32 ` Heiko Carstens
2025-03-11 14:36 ` Lorenzo Stoakes
2025-03-11 21:54 ` Jeff Xu
2025-03-11 12:33 ` [PATCH mm-unstable 2/2] mseal sysmap: enable s390 Heiko Carstens
2025-03-11 14:37 ` Lorenzo Stoakes
2025-03-11 21:55 ` Jeff Xu
2025-03-11 22:12 ` Jeff Xu
2025-03-12 15:39 ` Heiko Carstens
2025-03-12 23:53 ` Jeff Xu
2025-03-11 13:02 ` [PATCH mm-unstable 0/2] mseal system mappings fix + s390 enablement Lorenzo Stoakes
2025-03-11 13:37 ` Heiko Carstens
2025-03-11 13:42 ` Lorenzo Stoakes
2025-03-11 14:06 ` Heiko Carstens
2025-03-11 14:09 ` Lorenzo Stoakes
2025-03-11 14:21 ` Heiko Carstens [this message]
2025-03-11 14:30 ` Lorenzo Stoakes
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