From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 378133AE194; Wed, 18 Mar 2026 10:58:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773831522; cv=none; b=FdycXJ70l6vSdQMEqo9QFPndZWiNEPgUAGkp+kwENtYH7YW3wsZ95TBFDjG6r2yoX5JFyuM3jWDCnt7nO0YB4O1rHwY4Gr1rGxXshlbby+AbMmGR9s4vXcvdcyZ6mMUp3LniWzCXC6MpC/M1so67EiYFtyheaO7QlbO+VGAFQBM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773831522; c=relaxed/simple; bh=kLYySycm4Q+kO2x2jmLEs+z7oAnQtdjmqDIbHrWcbjw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=FkrwECbg3IvgAO1goomj0dMiHNJE6Vc3Vq3XhGmg0OFAcloAvlmdMSZsQHZw0d7weI12MXG4mUTP13qATgSV2r0ch+PDyGp3PFIKjEWL6yIcXqNWCVlOG40sZWdTk5OZi0vwa8vzW/Y8Yisl7Ds8CaInm3dmh4arWvTEBi8058E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eKiMcZ85; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eKiMcZ85" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65881C19421; Wed, 18 Mar 2026 10:58:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773831521; bh=kLYySycm4Q+kO2x2jmLEs+z7oAnQtdjmqDIbHrWcbjw=; h=From:To:Cc:Subject:Date:From; b=eKiMcZ85WLFC8bXWA/cKx5AD46CSeZMTj7t+7hTK626aenEZLjVU/M1bTaE/8BRRS X6S1Y6bTAssMWXPL91D/crg1FtPFmAE77lAntj2Q7m/PYz0wUHGJzu4AZOtr5VKYhD O9x+2NB3x0e+Qee3RPqpqmkTck/x41t2dPoDUPGIkmdpXAuih590JlibeZmTDiQlQj +q9tqVFXNLT50Bo4J93EDhzKNN36MtH2iOtNw1iebPTvJL5rSLJyP/H3K7GSINY4cU Jl739DvgI4xC+TxFvGCyIhqDj4Pg7a/bTjrprZ63VJjVDKtRWfpfjBV+NYDfdH+Dsr 4yKWpa/0srIqQ== From: Mike Rapoport To: Andrew Morton Cc: Alexander Potapenko , Alexander Viro , Andreas Larsson , Ard Biesheuvel , Borislav Petkov , Brendan Jackman , "Christophe Leroy (CS GROUP)" , Catalin Marinas , Christian Brauner , "David S. Miller" , Dave Hansen , David Hildenbrand , Dmitry Vyukov , Ilias Apalodimas , Ingo Molnar , Jan Kara , Johannes Weiner , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Marco Elver , Marek Szyprowski , Masami Hiramatsu , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , "H. Peter Anvin" , Rob Herring , Robin Murphy , Saravana Kannan , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , Zi Yan , devicetree@vger.kernel.org, iommu@lists.linux.dev, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH 0/8] memblock: improve late freeing of reserved memory Date: Wed, 18 Mar 2026 12:58:19 +0200 Message-ID: <20260318105827.1358927-1-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Mike Rapoport (Microsoft)" Hi, Following a recent discussion about leaks in x86 EFI [1], I audited usage of memblock_free_late() and free_reserved_area() and made some imporovements how we handle late freeing of the memory allocated with memblock. [1] https://lore.kernel.org/all/ec2aaef14783869b3be6e3c253b2dcbf67dbc12a.camel@kernel.crashing.org/ Mike Rapoport (Microsoft) (8): powerpc: fadump: pair alloc_pages_exact() with free_pages_exact() powerpc: opal-core: pair alloc_pages_exact() with free_pages_exact() mm: move free_reserved_area() to mm/memblock.c memblock: make free_reserved_area() more robust memblock: extract page freeing from free_reserved_area() into a helper memblock: make free_reserved_area() update memblock if ARCH_KEEP_MEMBLOCK=y memblock, treewide: make memblock_free() handle late freeing memblock: warn when freeing reserved memory before memory map is initialized arch/arm64/mm/init.c | 3 - arch/powerpc/kernel/fadump.c | 16 +-- arch/powerpc/platforms/powernv/opal-core.c | 9 +- arch/sparc/kernel/mdesc.c | 4 +- arch/x86/kernel/setup.c | 2 +- arch/x86/platform/efi/memmap.c | 5 +- arch/x86/platform/efi/quirks.c | 2 +- drivers/firmware/efi/apple-properties.c | 2 +- drivers/of/kexec.c | 2 +- include/linux/memblock.h | 2 - init/initramfs.c | 7 -- kernel/dma/swiotlb.c | 6 +- lib/bootconfig.c | 2 +- mm/internal.h | 10 ++ mm/kfence/core.c | 4 +- mm/memblock.c | 110 ++++++++++++++------- mm/page_alloc.c | 46 --------- 17 files changed, 102 insertions(+), 130 deletions(-) base-commit: 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681 -- 2.51.0