Re: mmotm 2019-08-27-20-39 uploaded (objtool: xen)

Randy Dunlap
2019-08-28T17:56:33Z

On 8/28/19 10:19 AM, Josh Poimboeuf wrote:
> On Wed, Aug 28, 2019 at 09:58:37AM -0700, Randy Dunlap wrote:
>> On 8/27/19 8:40 PM, akpm@linux-foundation.org wrote:
>>> The mm-of-the-moment snapshot 2019-08-27-20-39 has been uploaded to
>>>
>>> http://www.ozlabs.org/~akpm/mmotm/
>>>
>>> mmotm-readme.txt says
>>>
>>> README for mm-of-the-moment:
>>>
>>> http://www.ozlabs.org/~akpm/mmotm/
>>>
>>> This is a snapshot of my -mm patch queue. Uploaded at random hopefully
>>> more than once a week.
>>>
>>> You will need quilt to apply these patches to the latest Linus release (5.x
>>> or 5.x-rcY). The series file is in broken-out.tar.gz and is duplicated in
>>> http://ozlabs.org/~akpm/mmotm/series
>>>
>>> The file broken-out.tar.gz contains two datestamp files: .DATE and
>>> .DATE-yyyy-mm-dd-hh-mm-ss. Both contain the string yyyy-mm-dd-hh-mm-ss,
>>> followed by the base kernel version against which this patch series is to
>>> be applied.
>>
>>
>>
>> drivers/xen/gntdev.o: warning: objtool: gntdev_copy()+0x229: call to __ubsan_handle_out_of_bounds() with UACCESS enabled
>
> Easy one :-)
>
> diff --git a/tools/objtool/check.c b/tools/objtool/check.c
> index 0c8e17f946cd..6a935ab93149 100644
> --- a/tools/objtool/check.c
> +++ b/tools/objtool/check.c
> @@ -483,6 +483,7 @@ static const char *uaccess_safe_builtin[] = {
> "ubsan_type_mismatch_common",
> "__ubsan_handle_type_mismatch",
> "__ubsan_handle_type_mismatch_v1",
> + "__ubsan_handle_out_of_bounds",
> /* misc */
> "csum_partial_copy_generic",
> "__memcpy_mcsafe",
>

then I get this one:

lib/ubsan.o: warning: objtool: __ubsan_handle_out_of_bounds()+0x5d: call to ubsan_prologue() with UACCESS enabled

--
~Randy