From: Christopher Lameter <cl@linux.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: Kees Cook <keescook@chromium.org>,
linux-kernel@vger.kernel.org, David Windsor <dave@nullcore.net>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-xfs@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andy Lutomirski <luto@kernel.org>,
Christoph Hellwig <hch@infradead.org>,
"David S. Miller" <davem@davemloft.net>,
Laura Abbott <labbott@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Christoffer Dall <christoffer.dall@linaro.org>,
Dave Kleikamp <dave.kleikamp@oracle.com>, Jan Kara <jack@suse.cz>,
Luis de Bethencourt <luisbg@kernel.org>,
Marc Zyngier <marc.zyngier@arm.com>,
Rik van Riel <riel@redhat.com>,
Matthew Garrett <mjg59@google.com>,
linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org,
netdev@vger.kernel.org, kernel-hardening@lists.openwall.com
Subject: [kernel-hardening] Re: kmem_cache_attr (was Re: [PATCH 04/36] usercopy: Prepare for usercopy whitelisting)
Date: Wed, 17 Jan 2018 08:46:41 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.20.1801170843550.12151@nuc-kabylake> (raw)
In-Reply-To: <20180116210313.GA7791@bombadil.infradead.org>
On Tue, 16 Jan 2018, Matthew Wilcox wrote:
> On Tue, Jan 16, 2018 at 12:17:01PM -0600, Christopher Lameter wrote:
> > Draft patch of how the data structs could change. kmem_cache_attr is read
> > only.
>
> Looks good. Although I would add Kees' user feature:
Sure I tried to do this quickly so that the basic struct changes are
visible.
> And I'd start with
> +struct kmem_cache *kmem_cache_create_attr(const kmem_cache_attr *);
>
> leaving the old kmem_cache_create to kmalloc a kmem_cache_attr and
> initialise it.
Well at some point we should convert the callers by putting the
definitions into const kmem_cache_attr initializations. That way
the callbacks function pointers are safe.
> Can we also do something like this?
>
> -#define KMEM_CACHE(__struct, __flags) kmem_cache_create(#__struct,\
> - sizeof(struct __struct), __alignof__(struct __struct),\
> - (__flags), NULL)
> +#define KMEM_CACHE(__struct, __flags) ({ \
> + const struct kmem_cache_attr kca ## __stringify(__struct) = { \
> + .name = #__struct, \
> + .size = sizeof(struct __struct), \
> + .align = __alignof__(struct __struct), \
> + .flags = (__flags), \
> + }; \
> + kmem_cache_create_attr(&kca ## __stringify(__struct)); \
> +})
>
> That way we won't need to convert any of those users.
Yep thats what I was planning.
next prev parent reply other threads:[~2018-01-17 14:46 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 20:55 [kernel-hardening] [PATCH v4 00/36] Hardened usercopy whitelisting Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 01/36] usercopy: Remove pointer from overflow report Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 02/36] usercopy: Include offset in " Kees Cook
2018-01-10 15:25 ` [kernel-hardening] " Christopher Lameter
2018-01-10 21:15 ` Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 03/36] lkdtm/usercopy: Adjust test to include an offset to check reporting Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 04/36] usercopy: Prepare for usercopy whitelisting Kees Cook
2018-01-10 18:28 ` [kernel-hardening] " Christopher Lameter
2018-01-10 21:06 ` Kees Cook
2018-01-12 15:10 ` [kernel-hardening] " David Laight
2018-01-12 15:56 ` Christopher Lameter
2018-01-14 23:07 ` [kernel-hardening] " Matthew Wilcox
2018-01-16 15:21 ` [kernel-hardening] kmem_cache_attr (was Re: [PATCH 04/36] usercopy: Prepare for usercopy whitelisting) Christopher Lameter
2018-01-16 16:05 ` [kernel-hardening] " Matthew Wilcox
2018-01-16 16:54 ` Christopher Lameter
2018-01-16 17:43 ` Matthew Wilcox
2018-01-16 18:07 ` Christopher Lameter
2018-01-16 18:17 ` Christopher Lameter
2018-01-16 21:03 ` Matthew Wilcox
2018-01-17 14:46 ` Christopher Lameter [this message]
2018-01-17 17:42 ` Christopher Lameter
2018-01-17 19:31 ` Matthew Wilcox
2018-01-20 1:58 ` Christopher Lameter
2018-01-09 20:55 ` [kernel-hardening] [PATCH 05/36] usercopy: WARN() on slab cache usercopy region violations Kees Cook
2018-01-10 18:31 ` [kernel-hardening] " Christopher Lameter
2018-01-10 20:14 ` Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 06/36] usercopy: Mark kmalloc caches as usercopy caches Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 07/36] dcache: Define usercopy region in dentry_cache slab cache Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 08/36] vfs: Define usercopy region in names_cache slab caches Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 09/36] vfs: Copy struct mount.mnt_id to userspace using put_user() Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 10/36] ext4: Define usercopy region in ext4_inode_cache slab cache Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 11/36] ext2: Define usercopy region in ext2_inode_cache " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 12/36] jfs: Define usercopy region in jfs_ip " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 13/36] befs: Define usercopy region in befs_inode_cache " Kees Cook
2018-01-10 10:53 ` [kernel-hardening] " Luis de Bethencourt
2018-01-09 20:55 ` [kernel-hardening] [PATCH 14/36] exofs: Define usercopy region in exofs_inode_cache " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 15/36] orangefs: Define usercopy region in orangefs_inode_cache " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 16/36] ufs: Define usercopy region in ufs_inode_cache " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 17/36] vxfs: Define usercopy region in vxfs_inode " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 18/36] cifs: Define usercopy region in cifs_request " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 19/36] scsi: Define usercopy region in scsi_sense_cache " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 20/36] net: Define usercopy region in struct proto " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 21/36] ip: Define usercopy region in IP " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 22/36] caif: Define usercopy region in caif " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 23/36] sctp: Define usercopy region in SCTP " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 24/36] sctp: Copy struct sctp_sock.autoclose to userspace using put_user() Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 25/36] net: Restrict unwhitelisted proto caches to size 0 Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 26/36] fork: Define usercopy region in mm_struct slab caches Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 27/36] fork: Define usercopy region in thread_stack " Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 28/36] fork: Provide usercopy whitelisting for task_struct Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 29/36] x86: Implement thread_struct whitelist for hardened usercopy Kees Cook
2018-01-09 20:55 ` [kernel-hardening] [PATCH 30/36] arm64: " Kees Cook
2018-01-09 20:56 ` [kernel-hardening] [PATCH 31/36] arm: " Kees Cook
2018-01-09 20:56 ` [kernel-hardening] [PATCH 32/36] kvm: whitelist struct kvm_vcpu_arch Kees Cook
2018-01-09 20:56 ` [kernel-hardening] [PATCH 33/36] kvm: x86: fix KVM_XEN_HVM_CONFIG ioctl Kees Cook
2018-01-09 20:56 ` [kernel-hardening] [PATCH 34/36] usercopy: Allow strict enforcement of whitelists Kees Cook
2018-01-09 20:56 ` [kernel-hardening] [PATCH 35/36] usercopy: Restrict non-usercopy caches to size 0 Kees Cook
2018-01-09 20:56 ` [kernel-hardening] [PATCH 36/36] lkdtm: Update usercopy tests for whitelisting Kees Cook
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