From: Pavel Machek <pavel@denx.de>
To: Sasha Levin <sashal@kernel.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
syzbot+83e7f982ca045ab4405c@syzkaller.appspotmail.com,
Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
Andy Lutomirski <luto@kernel.org>,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org,
peterz@infradead.org, xin3.li@intel.com, ubizjak@gmail.com,
rick.p.edgecombe@intel.com, arnd@arndb.de, mjguzik@gmail.com,
bpf@vger.kernel.org
Subject: Re: [PATCH AUTOSEL 6.1 19/25] x86/mm: Remove broken vsyscall emulation code from the page fault code
Date: Mon, 13 May 2024 10:22:51 +0200 [thread overview]
Message-ID: <ZkHN25mewwQsCSVl@duo.ucw.cz> (raw)
In-Reply-To: <20240507231231.394219-19-sashal@kernel.org>
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Hi!
> From: Linus Torvalds <torvalds@linux-foundation.org>
>
> [ Upstream commit 02b670c1f88e78f42a6c5aee155c7b26960ca054 ]
...
> IOW, I think the only right thing is to remove that horrendously broken
> code.
>
> The attached patch looks like the ObviouslyCorrect(tm) thing to do.
>
> NOTE! This broken code goes back to this commit in 2011:
>
> 4fc3490114bb ("x86-64: Set siginfo and context on vsyscall emulation faults")
>
> .. and back then the reason was to get all the siginfo details right.
> Honestly, I do not for a moment believe that it's worth getting the siginfo
> details right here, but part of the commit says:
>
> This fixes issues with UML when vsyscall=emulate.
>
> .. and so my patch to remove this garbage will probably break UML in this
> situation.
>
> I do not believe that anybody should be running with vsyscall=emulate in
> 2024 in the first place, much less if you are doing things like UML. But
> let's see if somebody screams.
Surely this should not go to stable with just 14days in mainline? We
don't want stable users to scream.
Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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next prev parent reply other threads:[~2024-05-13 8:22 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-07 23:11 [PATCH AUTOSEL 6.1 01/25] ASoC: Intel: bytcr_rt5640: Apply Asus T100TA quirk to Asus T100TAM too Sasha Levin
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 02/25] regulator: irq_helpers: duplicate IRQ name Sasha Levin
2024-05-13 8:19 ` Pavel Machek
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 03/25] ASoC: rt5645: Fix the electric noise due to the CBJ contacts floating Sasha Levin
2024-05-13 8:14 ` Pavel Machek
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 04/25] ASoC: dt-bindings: rt5645: add cbj sleeve gpio property Sasha Levin
2024-05-13 8:16 ` Pavel Machek
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 05/25] regulator: vqmmc-ipq4019: fix module autoloading Sasha Levin
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 06/25] ASoC: rt715: add vendor clear control register Sasha Levin
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 07/25] ASoC: rt715-sdca: volume step modification Sasha Levin
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 08/25] KVM: selftests: Add test for uaccesses to non-existent vgic-v2 CPUIF Sasha Levin
2024-05-13 8:20 ` Pavel Machek
2024-05-13 8:27 ` Marc Zyngier
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 09/25] fpga: dfl-pci: add PCI subdevice ID for Intel D5005 card Sasha Levin
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 10/25] softirq: Fix suspicious RCU usage in __do_softirq() Sasha Levin
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 11/25] net: qede: sanitize 'rc' in qede_add_tc_flower_fltr() Sasha Levin
2024-05-07 23:11 ` [PATCH AUTOSEL 6.1 12/25] firewire: nosy: ensure user_length is taken into account when fetching packet contents Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 13/25] ASoC: da7219-aad: fix usage of device_get_named_child_node() Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 14/25] ALSA: hda: intel-dsp-config: harden I2C/I2S codec detection Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 15/25] drm/amd/display: Add dtbclk access to dcn315 Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 16/25] drm/amd/display: Atom Integrated System Info v2_2 for DCN35 Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 17/25] drm/amd/display: Add VCO speed parameter for DCN31 FPU Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 18/25] drm/amdkfd: Flush the process wq before creating a kfd_process Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 19/25] x86/mm: Remove broken vsyscall emulation code from the page fault code Sasha Levin
2024-05-13 8:22 ` Pavel Machek [this message]
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 20/25] nvme: find numa distance only if controller has valid numa id Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 21/25] nvmet-auth: return the error code to the nvmet_auth_host_hash() callers Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 22/25] nvmet-auth: replace pr_debug() with pr_err() to report an error Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 23/25] nvmet-tcp: fix possible memory leak when tearing down a controller Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 24/25] nvmet: fix nvme status code when namespace is disabled Sasha Levin
2024-05-07 23:12 ` [PATCH AUTOSEL 6.1 25/25] epoll: be better about file lifetimes Sasha Levin
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