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From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>,
	x86@kernel.org, David Airlie <airlied@linux.ie>,
	Daniel Vetter <daniel@ffwll.ch>,
	Laura Abbott <labbott@redhat.com>,
	Sumit Semwal <sumit.semwal@linaro.org>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>
Cc: Robin Murphy <robin.murphy@arm.com>,
	Christophe Leroy <christophe.leroy@c-s.fr>,
	Peter Zijlstra <peterz@infradead.org>,
	linuxppc-dev@lists.ozlabs.org, linux-hyperv@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
	linux-arch@vger.kernel.org, linux-mm@kvack.org,
	iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: decruft the vmalloc API v2
Date: Tue, 14 Apr 2020 15:13:19 +0200
Message-ID: <20200414131348.444715-1-hch@lst.de> (raw)

Hi all,

Peter noticed that with some dumb luck you can toast the kernel address
space with exported vmalloc symbols.

I used this as an opportunity to decruft the vmalloc.c API and make it
much more systematic.  This also removes any chance to create vmalloc
mappings outside the designated areas or using executable permissions
from modules.  Besides that it removes more than 300 lines of code.

A git tree is also available here:

    git://git.infradead.org/users/hch/misc.git sanitize-vmalloc-api.2

Gitweb:

    http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/sanitize-vmalloc-api.2

Changes since v1:
 - implement pgprot_nx for arm64 (Mark Rutland)
 - fix a patch description
 - properly pass pgprot to vmap in ion
 - add a new patch to fix vmap() API misuse
 - fix a vmap argument in x86
 - two more vmalloc cleanups
 - cleanup use of the unmap_kernel_range API
 - rename ioremap_pbh to ioremap_phb

             reply index

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-14 13:13 Christoph Hellwig [this message]
2020-04-14 13:13 ` [PATCH 01/29] x86/hyperv: use vmalloc_exec for the hypercall page Christoph Hellwig
2020-04-14 13:13 ` [PATCH 02/29] x86: fix vmap arguments in map_irq_stack Christoph Hellwig
2020-04-14 13:13 ` [PATCH 03/29] staging: android: ion: use vmap instead of vm_map_ram Christoph Hellwig
2020-04-14 13:13 ` [PATCH 04/29] staging: media: ipu3: use vmap instead of reimplementing it Christoph Hellwig
2020-04-23 10:32   ` Sakari Ailus
2020-04-14 13:13 ` [PATCH 05/29] dma-mapping: use vmap insted " Christoph Hellwig
2020-04-14 13:13 ` [PATCH 06/29] powerpc: add an ioremap_phb helper Christoph Hellwig
2020-04-14 13:13 ` [PATCH 07/29] powerpc: remove __ioremap_at and __iounmap_at Christoph Hellwig
2020-04-14 13:13 ` [PATCH 08/29] mm: remove __get_vm_area Christoph Hellwig
2020-04-14 13:13 ` [PATCH 09/29] mm: unexport unmap_kernel_range_noflush Christoph Hellwig
2020-04-14 13:13 ` [PATCH 10/29] mm: rename CONFIG_PGTABLE_MAPPING to CONFIG_ZSMALLOC_PGTABLE_MAPPING Christoph Hellwig
2020-04-14 13:13 ` [PATCH 11/29] mm: only allow page table mappings for built-in zsmalloc Christoph Hellwig
2020-04-16 20:43   ` Minchan Kim
2020-04-14 13:13 ` [PATCH 12/29] mm: pass addr as unsigned long to vb_free Christoph Hellwig
2020-04-14 13:13 ` [PATCH 13/29] mm: remove vmap_page_range_noflush and vunmap_page_range Christoph Hellwig
2020-04-14 13:13 ` [PATCH 14/29] mm: rename vmap_page_range to map_kernel_range Christoph Hellwig
2020-04-14 13:13 ` [PATCH 15/29] mm: don't return the number of pages from map_kernel_range{,_noflush} Christoph Hellwig
2020-04-14 13:13 ` [PATCH 16/29] mm: remove map_vm_range Christoph Hellwig
2020-04-14 13:13 ` [PATCH 17/29] mm: remove unmap_vmap_area Christoph Hellwig
2020-04-14 13:13 ` [PATCH 18/29] mm: remove the prot argument from vm_map_ram Christoph Hellwig
2020-04-14 13:13 ` [PATCH 19/29] mm: enforce that vmap can't map pages executable Christoph Hellwig
2020-04-14 13:13 ` [PATCH 20/29] gpu/drm: remove the powerpc hack in drm_legacy_sg_alloc Christoph Hellwig
2020-04-14 13:13 ` [PATCH 21/29] mm: remove the pgprot argument to __vmalloc Christoph Hellwig
2020-04-14 15:13   ` Wei Liu
     [not found]     ` <CAMeeMh8Q3Od76WaTasw+BpYVF58P-HQMaiFKHxXbZ_Q3tQPZ=A@mail.gmail.com>
2020-05-01  2:38       ` John Dorminy
2020-05-01 22:09         ` Andrew Morton
2020-04-14 13:13 ` [PATCH 22/29] mm: remove the prot argument to __vmalloc_node Christoph Hellwig
2020-04-14 13:13 ` [PATCH 23/29] mm: remove both instances of __vmalloc_node_flags Christoph Hellwig
2020-04-14 13:13 ` [PATCH 24/29] mm: remove __vmalloc_node_flags_caller Christoph Hellwig
2020-04-20  9:27   ` Geert Uytterhoeven
2020-04-14 13:13 ` [PATCH 25/29] mm: switch the test_vmalloc module to use __vmalloc_node Christoph Hellwig
2020-04-14 13:13 ` [PATCH 26/29] mm: remove vmalloc_user_node_flags Christoph Hellwig
2020-04-20  9:26   ` Geert Uytterhoeven
2020-04-14 13:13 ` [PATCH 27/29] arm64: use __vmalloc_node in arch_alloc_vmap_stack Christoph Hellwig
2020-04-14 13:13 ` [PATCH 28/29] powerpc: use __vmalloc_node in alloc_vm_stack Christoph Hellwig
2020-04-14 13:13 ` [PATCH 29/29] s390: use __vmalloc_node in stack_alloc Christoph Hellwig

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