linux-kernel - Re: regression on aarch64? panic on boot

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Message-ID: <59599137a9556355cb43563a4fbcc05b0fe769b4.camel@suse.com>
Date:   Tue, 17 Jan 2023 13:11:45 +0100
From:   Martin Wilck <mwilck@...e.com>
To:     Christoph Hellwig <hch@....de>, Klaus Jensen <its@...elevant.dk>
Cc:     Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Sagi Grimberg <sagi@...mberg.me>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: regression on aarch64? panic on boot

On Tue, 2023-01-17 at 07:37 +0100, Christoph Hellwig wrote:
> On Tue, Jan 17, 2023 at 07:31:59AM +0100, Klaus Jensen wrote:
> > Good morning Christoph,
> > 
> > Yep, the above works.
> 
> Context for the newly added: This is dropping the newly added
> PROBE_PREFER_ASYNCHRONOUS in nvme, which causes Klaus' arm64 (but not
> other boot tests) to fail.  Any idea what could be going wrong there
> probably in userspace?

If this is an aarch64 userspace issue, maybe related to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107678 ?

That bug causes segfaults of user space programs if for some reason the
unwind code is invoked. It happens only if libgcc_s.so is compiled with
gcc 13, and the pauth CPU feature is enabled in qemu.

Martin