From: Borislav Petkov <bp@alien8.de>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Baoquan He <bhe@redhat.com>, Ard Biesheuvel <ardb@kernel.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Sean Christopherson <seanjc@google.com>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
Kai Huang <kai.huang@intel.com>
Subject: Re: [PATCHv4, REBASED 1/4] x86/mm/ident_map: Fix virtual address wrap to zero
Date: Thu, 31 Oct 2024 14:59:16 +0100 [thread overview]
Message-ID: <20241031135916.GDZyONNENEDAViMSOZ@fat_crate.local> (raw)
In-Reply-To: <3rmdms6czfsa4hwfx5egcf5rheojpwhdhwq2gxkn2ffvvymfir@dv7x4cmby6sz>
On Thu, Oct 31, 2024 at 12:11:52PM +0200, Kirill A. Shutemov wrote:
> Do we have magic words for that?
No clue.
> I tried to express that in the second paragraph: "no such users in the
> upstream".
Right, so perhaps better to spell it out explicitly:
"Backporter's note:
This fixes a theoretical issue only and there's no need to backport it to
stable."
at the end of the commit message.
> > And which commit is it fixing?
> >
> > aece27851d44 ("x86, 64bit, mm: Add generic kernel/ident mapping helper")
> > perhaps?
>
> This one is closer:
>
> e4630fdd4763 ("x86/power/64: Always create temporary identity mapping correctly")
>
> It adds x86_mapping_info::offset.
But aece27851d44 has the faulty check...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2024-10-31 13:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-16 11:14 [PATCHv4, REBASED 0/4] x86: Reduce code duplication on page table initialization Kirill A. Shutemov
2024-10-16 11:14 ` [PATCHv4, REBASED 1/4] x86/mm/ident_map: Fix virtual address wrap to zero Kirill A. Shutemov
2024-10-30 11:47 ` Borislav Petkov
2024-10-31 10:11 ` Kirill A. Shutemov
2024-10-31 13:59 ` Borislav Petkov [this message]
2024-11-04 9:26 ` Kirill A. Shutemov
2025-03-10 19:50 ` [tip: x86/mm] x86/mm/ident_map: Fix theoretical virtual address overflow " tip-bot2 for Kirill A. Shutemov
2025-03-19 11:04 ` [tip: x86/core] " tip-bot2 for Kirill A. Shutemov
2024-10-16 11:14 ` [PATCHv4, REBASED 2/4] x86/acpi: Replace manual page table initialization with kernel_ident_mapping_init() Kirill A. Shutemov
2025-03-10 19:50 ` [tip: x86/mm] " tip-bot2 for Kirill A. Shutemov
2025-03-19 11:04 ` [tip: x86/core] " tip-bot2 for Kirill A. Shutemov
2024-10-16 11:14 ` [PATCHv4, REBASED 3/4] x86/64/kexec: Map original relocate_kernel() in init_transition_pgtable() Kirill A. Shutemov
2024-10-31 14:23 ` Borislav Petkov
2024-10-16 11:14 ` [PATCHv4, REBASED 4/4] x86/64/kexec: Rewrite init_transition_pgtable() with kernel_ident_mapping_init() Kirill A. Shutemov
2024-10-29 15:09 ` [PATCHv4, REBASED 0/4] x86: Reduce code duplication on page table initialization Kirill A. Shutemov
2024-10-31 16:21 ` Dave Hansen
2025-03-10 19:45 ` Ingo Molnar
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