From: Nikolay Borisov <nik.borisov@suse.com>
To: Mike Rapoport <rppt@kernel.org>, Peter Zijlstra <peterz@infradead.org>
Cc: "Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Ingo Molnar" <mingo@redhat.com>, "J�rgen Gro�" <jgross@suse.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Thomas Gleixner" <tglx@linutronix.de>, "Xin Li" <xin@zytor.com>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
x86@kernel.org
Subject: Re: [PATCH 4/5] x86/its: explicitly manage permissions for ITS pages
Date: Thu, 5 Jun 2025 12:23:30 +0300 [thread overview]
Message-ID: <652ce9db-0bca-4892-aa16-1c41ef469f51@suse.com> (raw)
In-Reply-To: <20250603111446.2609381-5-rppt@kernel.org>
On 6/3/25 14:14, Mike Rapoport wrote:
> From: "Peter Zijlstra (Intel)" <peterz@infradead.org>
>
> execmem_alloc() sets permissions differently depending on the kernel
> configuration, CPU support for PSE and whether a page is allocated
> before or after mark_rodata_ro().
>
> Add tracking for pages allocated for ITS when patching the core kernel
> and make sure the permissions for ITS pages are explicitly managed for
> both kernel and module allocations.
>
> Fixes: 872df34d7c51 ("x86/its: Use dynamic thunks for indirect branches")
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Co-developed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
next prev parent reply other threads:[~2025-06-05 9:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-03 11:14 [PATCH 0/5] Fixes for ITS mitigation and execmem Mike Rapoport
2025-06-03 11:14 ` [PATCH 1/5] x86/mm/pat: don't collapse pages without PSE set Mike Rapoport
2025-06-03 11:14 ` [PATCH 2/5] x86/Kconfig: only enable ROX cache in execmem when STRICT_MODULE_RWX is set Mike Rapoport
2025-06-11 9:30 ` [tip: x86/urgent] " tip-bot2 for Mike Rapoport (Microsoft)
2025-06-03 11:14 ` [PATCH 3/5] x86/its: move its_pages array to struct mod_arch_specific Mike Rapoport
2025-06-03 11:18 ` kernel test robot
2025-06-11 9:30 ` [tip: x86/urgent] " tip-bot2 for Mike Rapoport (Microsoft)
2025-06-03 11:14 ` [PATCH 4/5] x86/its: explicitly manage permissions for ITS pages Mike Rapoport
2025-06-03 13:58 ` Peter Zijlstra
2025-06-03 14:36 ` Mike Rapoport
2025-06-03 14:45 ` Peter Zijlstra
2025-06-11 21:09 ` Chuck Zmudzinski
2025-06-05 9:23 ` Nikolay Borisov [this message]
2025-06-11 9:30 ` [tip: x86/urgent] " tip-bot2 for Peter Zijlstra (Intel)
2025-06-03 11:14 ` [PATCH 5/5] Revert "mm/execmem: Unify early execmem_cache behaviour" Mike Rapoport
2025-06-11 9:30 ` [tip: x86/urgent] " tip-bot2 for Mike Rapoport (Microsoft)
2025-06-10 6:00 ` [PATCH 0/5] Fixes for ITS mitigation and execmem Jürgen Groß
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