From: Igor Stoppa <igor.stoppa@gmail.com> To: Mimi Zohar <zohar@linux.vnet.ibm.com>, Kees Cook <keescook@chromium.org>, Matthew Wilcox <willy@infradead.org>, Dave Chinner <david@fromorbit.com>, James Morris <jmorris@namei.org>, Michal Hocko <mhocko@kernel.org>, kernel-hardening@lists.openwall.com, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org Cc: igor.stoppa@huawei.com, Dave Hansen <dave.hansen@linux.intel.com>, Jonathan Corbet <corbet@lwn.net>, Laura Abbott <labbott@redhat.com>, Andrew Morton <akpm@linux-foundation.org>, Chintan Pandya <cpandya@codeaurora.org>, Joe Perches <joe@perches.com>, "Luis R. Rodriguez" <mcgrof@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Kate Stewart <kstewart@linuxfoundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Philippe Ombredanne <pombredanne@nexb.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 03/17] prmem: vmalloc support for dynamic allocation Date: Wed, 24 Oct 2018 00:34:50 +0300 Message-ID: <20181023213504.28905-4-igor.stoppa@huawei.com> (raw) In-Reply-To: <20181023213504.28905-1-igor.stoppa@huawei.com> Prepare vmalloc for: - tagging areas used for dynamic allocation of protected memory - supporting various tags, related to the property that an area might have - extrapolating the pool containing a given area - chaining the areas in each pool - extrapolating the area containing a given memory address NOTE: Since there is a list_head structure that is used only when disposing of the allocation (the field purge_list), there are two pointers for the take, before it comes the time of freeing the allocation. To avoid increasing the size of the vmap_area structure, instead of using a standard doubly linked list for tracking the chain of vmap_areas, only one pointer is spent for this purpose, in a single linked list, while the other is used to provide a direct connection to the parent pool. Signed-off-by: Igor Stoppa <igor.stoppa@huawei.com> CC: Michal Hocko <mhocko@kernel.org> CC: Andrew Morton <akpm@linux-foundation.org> CC: Chintan Pandya <cpandya@codeaurora.org> CC: Joe Perches <joe@perches.com> CC: "Luis R. Rodriguez" <mcgrof@kernel.org> CC: Thomas Gleixner <tglx@linutronix.de> CC: Kate Stewart <kstewart@linuxfoundation.org> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Philippe Ombredanne <pombredanne@nexb.com> CC: linux-mm@kvack.org CC: linux-kernel@vger.kernel.org --- include/linux/vmalloc.h | 12 +++++++++++- mm/vmalloc.c | 2 +- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 398e9c95cd61..4d14a3b8089e 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -21,6 +21,9 @@ struct notifier_block; /* in notifier.h */ #define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */ #define VM_NO_GUARD 0x00000040 /* don't add guard page */ #define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */ +#define VM_PMALLOC 0x00000100 /* pmalloc area - see docs */ +#define VM_PMALLOC_WR 0x00000200 /* pmalloc write rare area */ +#define VM_PMALLOC_PROTECTED 0x00000400 /* pmalloc protected area */ /* bits [20..32] reserved for arch specific ioremap internals */ /* @@ -48,7 +51,13 @@ struct vmap_area { unsigned long flags; struct rb_node rb_node; /* address sorted rbtree */ struct list_head list; /* address sorted list */ - struct llist_node purge_list; /* "lazy purge" list */ + union { + struct llist_node purge_list; /* "lazy purge" list */ + struct { + struct vmap_area *next; + struct pmalloc_pool *pool; + }; + }; struct vm_struct *vm; struct rcu_head rcu_head; }; @@ -134,6 +143,7 @@ extern struct vm_struct *__get_vm_area_caller(unsigned long size, const void *caller); extern struct vm_struct *remove_vm_area(const void *addr); extern struct vm_struct *find_vm_area(const void *addr); +extern struct vmap_area *find_vmap_area(unsigned long addr); extern int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages); diff --git a/mm/vmalloc.c b/mm/vmalloc.c index a728fc492557..15850005fea5 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -742,7 +742,7 @@ static void free_unmap_vmap_area(struct vmap_area *va) free_vmap_area_noflush(va); } -static struct vmap_area *find_vmap_area(unsigned long addr) +struct vmap_area *find_vmap_area(unsigned long addr) { struct vmap_area *va; -- 2.17.1
next prev parent reply index Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-10-23 21:34 [RFC v1 PATCH 00/17] prmem: protected memory Igor Stoppa 2018-10-23 21:34 ` [PATCH 01/17] prmem: linker section for static write rare Igor Stoppa 2018-10-23 21:34 ` [PATCH 02/17] prmem: write rare for static allocation Igor Stoppa 2018-10-25 0:24 ` Dave Hansen 2018-10-29 18:03 ` Igor Stoppa 2018-10-26 9:41 ` Peter Zijlstra 2018-10-29 20:01 ` Igor Stoppa 2018-10-23 21:34 ` Igor Stoppa [this message] 2018-10-25 0:26 ` [PATCH 03/17] prmem: vmalloc support for dynamic allocation Dave Hansen 2018-10-29 18:07 ` Igor Stoppa 2018-10-23 21:34 ` [PATCH 04/17] prmem: " Igor Stoppa 2018-10-23 21:34 ` [PATCH 05/17] prmem: shorthands for write rare on common types Igor Stoppa 2018-10-25 0:28 ` Dave Hansen 2018-10-29 18:12 ` Igor Stoppa 2018-10-23 21:34 ` [PATCH 06/17] prmem: test cases for memory protection Igor Stoppa 2018-10-24 3:27 ` Randy Dunlap 2018-10-24 14:24 ` Igor Stoppa 2018-10-25 16:43 ` Dave Hansen 2018-10-29 18:16 ` Igor Stoppa 2018-10-23 21:34 ` [PATCH 07/17] prmem: lkdtm tests " Igor Stoppa 2018-10-23 21:34 ` [PATCH 08/17] prmem: struct page: track vmap_area Igor Stoppa 2018-10-24 3:12 ` Matthew Wilcox 2018-10-24 23:01 ` Igor Stoppa 2018-10-25 2:13 ` Matthew Wilcox 2018-10-29 18:21 ` Igor Stoppa 2018-10-23 21:34 ` [PATCH 09/17] prmem: hardened usercopy Igor Stoppa 2018-10-29 11:45 ` Chris von Recklinghausen 2018-10-29 18:24 ` Igor Stoppa 2018-10-23 21:34 ` [PATCH 10/17] prmem: documentation Igor Stoppa 2018-10-24 3:48 ` Randy Dunlap 2018-10-24 14:30 ` Igor Stoppa 2018-10-24 23:04 ` Mike Rapoport 2018-10-29 19:05 ` Igor Stoppa 2018-10-26 9:26 ` Peter Zijlstra 2018-10-26 10:20 ` Matthew Wilcox 2018-10-29 19:28 ` Igor Stoppa 2018-10-26 10:46 ` Kees Cook 2018-10-28 18:31 ` Peter Zijlstra 2018-10-29 21:04 ` Igor Stoppa 2018-10-30 15:26 ` Peter Zijlstra 2018-10-30 16:37 ` Kees Cook 2018-10-30 17:06 ` Andy Lutomirski 2018-10-30 17:58 ` Matthew Wilcox 2018-10-30 18:03 ` Dave Hansen 2018-10-31 9:18 ` Peter Zijlstra 2018-10-30 18:28 ` Tycho Andersen 2018-10-30 19:20 ` Matthew Wilcox 2018-10-30 20:43 ` Igor Stoppa 2018-10-30 21:02 ` Andy Lutomirski 2018-10-30 21:07 ` Kees Cook 2018-10-30 21:25 ` Igor Stoppa 2018-10-30 22:15 ` Igor Stoppa 2018-10-31 10:11 ` Peter Zijlstra 2018-10-31 20:38 ` Andy Lutomirski 2018-10-31 20:53 ` Andy Lutomirski 2018-10-31 9:45 ` Peter Zijlstra 2018-10-30 21:35 ` Matthew Wilcox 2018-10-30 21:49 ` Igor Stoppa 2018-10-31 4:41 ` Andy Lutomirski 2018-10-31 9:08 ` Igor Stoppa 2018-10-31 19:38 ` Igor Stoppa 2018-10-31 10:02 ` Peter Zijlstra 2018-10-31 20:36 ` Andy Lutomirski 2018-10-31 21:00 ` Peter Zijlstra 2018-10-31 22:57 ` Andy Lutomirski 2018-10-31 23:10 ` Igor Stoppa 2018-10-31 23:19 ` Andy Lutomirski 2018-10-31 23:26 ` Igor Stoppa 2018-11-01 8:21 ` Thomas Gleixner 2018-11-01 15:58 ` Igor Stoppa 2018-11-01 17:08 ` Peter Zijlstra 2018-10-30 18:51 ` Andy Lutomirski 2018-10-30 19:14 ` Kees Cook 2018-10-30 21:25 ` Matthew Wilcox 2018-10-30 21:55 ` Igor Stoppa 2018-10-30 22:08 ` Matthew Wilcox 2018-10-31 9:29 ` Peter Zijlstra 2018-10-30 23:18 ` Nadav Amit 2018-10-31 9:08 ` Peter Zijlstra 2018-11-01 16:31 ` Nadav Amit 2018-11-02 21:11 ` Nadav Amit 2018-10-31 9:36 ` Peter Zijlstra 2018-10-31 11:33 ` Matthew Wilcox 2018-11-13 14:25 ` Igor Stoppa 2018-11-13 17:16 ` Andy Lutomirski 2018-11-13 17:43 ` Nadav Amit 2018-11-13 17:47 ` Andy Lutomirski 2018-11-13 18:06 ` Nadav Amit 2018-11-13 18:31 ` Igor Stoppa 2018-11-13 18:33 ` Igor Stoppa 2018-11-13 18:36 ` Andy Lutomirski 2018-11-13 19:03 ` Igor Stoppa 2018-11-21 16:34 ` Igor Stoppa 2018-11-21 17:36 ` Nadav Amit 2018-11-21 18:01 ` Igor Stoppa 2018-11-21 18:15 ` Andy Lutomirski 2018-11-22 19:27 ` Igor Stoppa 2018-11-22 20:04 ` Matthew Wilcox 2018-11-22 20:53 ` Andy Lutomirski 2018-12-04 12:34 ` Igor Stoppa 2018-11-13 18:48 ` Andy Lutomirski 2018-11-13 19:35 ` Igor Stoppa 2018-11-13 18:26 ` Igor Stoppa 2018-11-13 18:35 ` Andy Lutomirski 2018-11-13 19:01 ` Igor Stoppa 2018-10-31 9:27 ` Igor Stoppa 2018-10-26 11:09 ` Markus Heiser 2018-10-29 19:35 ` Igor Stoppa 2018-10-26 15:05 ` Jonathan Corbet 2018-10-29 19:38 ` Igor Stoppa 2018-10-29 20:35 ` Igor Stoppa 2018-10-23 21:34 ` [PATCH 11/17] prmem: llist: use designated initializer Igor Stoppa 2018-10-23 21:34 ` [PATCH 12/17] prmem: linked list: set alignment Igor Stoppa 2018-10-26 9:31 ` Peter Zijlstra 2018-10-23 21:35 ` [PATCH 13/17] prmem: linked list: disable layout randomization Igor Stoppa 2018-10-24 13:43 ` Alexey Dobriyan 2018-10-29 19:40 ` Igor Stoppa 2018-10-26 9:32 ` Peter Zijlstra 2018-10-26 10:17 ` Matthew Wilcox 2018-10-30 15:39 ` Peter Zijlstra 2018-10-23 21:35 ` [PATCH 14/17] prmem: llist, hlist, both plain and rcu Igor Stoppa 2018-10-24 11:37 ` Mathieu Desnoyers 2018-10-24 14:03 ` Igor Stoppa 2018-10-24 14:56 ` Tycho Andersen 2018-10-24 22:52 ` Igor Stoppa 2018-10-25 8:11 ` Tycho Andersen 2018-10-28 9:52 ` Steven Rostedt 2018-10-29 19:43 ` Igor Stoppa 2018-10-26 9:38 ` Peter Zijlstra 2018-10-23 21:35 ` [PATCH 15/17] prmem: test cases for prlist and prhlist Igor Stoppa 2018-10-23 21:35 ` [PATCH 16/17] prmem: pratomic-long Igor Stoppa 2018-10-25 0:13 ` Peter Zijlstra 2018-10-29 21:17 ` Igor Stoppa 2018-10-30 15:58 ` Peter Zijlstra 2018-10-30 16:28 ` Will Deacon 2018-10-31 9:10 ` Peter Zijlstra 2018-11-01 3:28 ` Kees Cook 2018-10-23 21:35 ` [PATCH 17/17] prmem: ima: turn the measurements list write rare Igor Stoppa 2018-10-24 23:03 ` [RFC v1 PATCH 00/17] prmem: protected memory Dave Chinner 2018-10-29 19:47 ` Igor Stoppa
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