Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1201617

Re: [PATCH 0/7] test_user_copy improvements

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

On 06/08/15 10:50, Guenter Roeck wrote:
> Hi James,
> 
> On Wed, Aug 05, 2015 at 04:48:48PM +0100, James Hogan wrote:
>> These patches extend the test_user_copy test module to handle lots more
>> cases of user accessors which architectures can override separately, and
>> in particular those which are important for checking the MIPS Enhanced
>> Virtual Addressing (EVA) implementations, which need to handle
>> overlapping user and kernel address spaces, with special instructions
>> for accessing user address space from kernel mode.
>>
>> - Checking that kernel pointers are accepted when user address limit is
>>   set to KERNEL_DS, as done by the kernel when it internally invokes
>>   system calls with kernel pointers.
>> - Checking of the unchecked accessors (which don't call access_ok()).
>>   Some of the tests are special cased for EVA at the moment which has
>>   stricter hardware guarantees for bad user accesses than other
>>   configurations.
>> - Checking of other sets of user accessors, including the inatomic user
>>   copies, copy_in_user, clear_user, the user string accessors, and the
>>   user checksum functions, all of which need special handling in arch
>>   code with EVA.
>>
>> Tested on MIPS with and without EVA, and on x86_64.
>>
> The series causes several build failures with other architectures.

Thanks Guenter, and sorry for the breakage. I've already got some fixes
lined up. From the failure logs it looks like #ifdef CONFIG_COMPAT for
[__]copy_in_user and #ifndef _HAVE_ARCH_COPY_AND_CSUM_FROM_USER for the
the ppc64 csum_partial_copy_from_user one Stephen caught should sort it out.

Cheers
James

> 
> From next-20150806:
> 
> Build results:
> 	total: 152 pass: 138 fail: 14
> Failed builds:
> 	alpha:allmodconfig (*)
> 	arm:allmodconfig (*)
> 	arm:omap2plus_defconfig
> 	arm64:allmodconfig
> 	i386:allyesconfig (*)
> 	i386:allmodconfig (*)
> 	m68k:defconfig (*)
> 	m68k:allmodconfig (*)
> 	m68k:sun3_defconfig (*)
> 	mips:allmodconfig
> 	parisc:allmodconfig
> 	s390:allmodconfig
> 	sparc32:allmodconfig (*)
> 	xtensa:allmodconfig (*)
> 
> The builds marked with (*) fail because of your patch series.
> 
> Guenter
> 

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 0/7] test_user_copy improvements James Hogan <james.hogan@imgtec.com> - 2015-08-05 17:50 +0200
  [PATCH 7/7] test_user_copy: Check user checksum functions James Hogan <james.hogan@imgtec.com> - 2015-08-05 17:50 +0200
  [PATCH 2/7] test_user_copy: Check unchecked accessors James Hogan <james.hogan@imgtec.com> - 2015-08-05 17:50 +0200
  [PATCH 3/7] test_user_copy: Check __clear_user()/clear_user() James Hogan <james.hogan@imgtec.com> - 2015-08-05 18:00 +0200
  [PATCH 1/7] test_user_copy: Check legit kernel accesses James Hogan <james.hogan@imgtec.com> - 2015-08-05 18:00 +0200
  [PATCH 6/7] test_user_copy: Check user string accessors James Hogan <james.hogan@imgtec.com> - 2015-08-05 18:00 +0200
  [PATCH 4/7] test_user_copy: Check __copy_in_user()/copy_in_user() James Hogan <james.hogan@imgtec.com> - 2015-08-05 18:00 +0200
  [PATCH 5/7] test_user_copy: Check __copy_{to,from}_user_inatomic() James Hogan <james.hogan@imgtec.com> - 2015-08-05 18:00 +0200
  Re: [PATCH 0/7] test_user_copy improvements Kees Cook <keescook@chromium.org> - 2015-08-05 22:30 +0200
    Re: [PATCH 0/7] test_user_copy improvements James Hogan <james.hogan@imgtec.com> - 2015-08-06 18:30 +0200
  Re: [PATCH 0/7] test_user_copy improvements Guenter Roeck <linux@roeck-us.net> - 2015-08-06 12:00 +0200
    Re: [PATCH 0/7] test_user_copy improvements James Hogan <james.hogan@imgtec.com> - 2015-08-06 12:10 +0200
  Re: [PATCH 0/7] test_user_copy improvements James Hogan <james.hogan@imgtec.com> - 2015-08-06 17:10 +0200

csiph-web