Hi Andrew, On 05/08/15 16:48, 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.
Could you drop these patches for -mm for the moment please. I'll get a
v2 to fix the build problems out tomorrow now.
Cheers
James
>
> James Hogan (7):
> test_user_copy: Check legit kernel accesses
> test_user_copy: Check unchecked accessors
> test_user_copy: Check __clear_user()/clear_user()
> test_user_copy: Check __copy_in_user()/copy_in_user()
> test_user_copy: Check __copy_{to,from}_user_inatomic()
> test_user_copy: Check user string accessors
> test_user_copy: Check user checksum functions
>
> lib/test_user_copy.c | 221
> +++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 221 insertions(+)
>
> Cc: Kees Cook <[email protected]>
> Cc: Andrew Morton <[email protected]>
>
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