From: Helge Deller <deller@gmx.de>
To: Sven Schnelle <svens@stackframe.org>,
John David Anglin <dave.anglin@bell.net>
Cc: linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] parisc/entry: set W bit for !compat tasks in syscall_restore_rfi()
Date: Thu, 16 Oct 2025 01:38:47 +0200 [thread overview]
Message-ID: <4f2872c0-01b4-416d-ba7c-63ff4b3b02ff@gmx.de> (raw)
In-Reply-To: <20251015212141.289981-1-svens@stackframe.org>
On 10/15/25 23:21, Sven Schnelle wrote:
> When the kernel leaves to userspace via syscall_restore_rfi(), the
> W bit is not set in the new PSW. This doesn't cause any problems
> because there's no 64 bit userspace for parisc. Simple static binaries
> are usually loaded at addresses way below the 32 bit limit so the W bit
> doesn't matter.
>
> Fix this by setting the W bit when TIF_32BIT is not set.
>
> Signed-off-by: Sven Schnelle <svens@stackframe.org>
> ---
> arch/parisc/kernel/asm-offsets.c | 2 ++
> arch/parisc/kernel/entry.S | 5 ++++-
> 2 files changed, 6 insertions(+), 1 deletion(-)
applied.
Thanks!
Helge
prev parent reply other threads:[~2025-10-15 23:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-15 21:21 Sven Schnelle
2025-10-15 23:38 ` Helge Deller [this message]
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