On 9/27/24 10:07 AM, Donet Tom wrote: > The hmm2 double_map test was failing due to an incorrect > buffer->mirror size. The buffer->mirror size was 6, while buffer->ptr > size was 6 * PAGE_SIZE. The test failed because the kernel's > copy_to_user function was attempting to copy a 6 * PAGE_SIZE buffer > to buffer->mirror. Since the size of buffer->mirror was incorrect, > copy_to_user failed. > > This patch corrects the buffer->mirror size to 6 * PAGE_SIZE. > > Test Result without this patch > ============================== > # RUN hmm2.hmm2_device_private.double_map ... > # hmm-tests.c:1680:double_map:Expected ret (-14) == 0 (0) > # double_map: Test terminated by assertion > # FAIL hmm2.hmm2_device_private.double_map > not ok 53 hmm2.hmm2_device_private.double_map > > Test Result with this patch > =========================== > # RUN hmm2.hmm2_device_private.double_map ... > # OK hmm2.hmm2_device_private.double_map > ok 53 hmm2.hmm2_device_private.double_map > > Signed-off-by: Donet Tom <donettom@xxxxxxxxxxxxx> Please add Fixes-by tag. Other than this, LGTM Reviewed-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx> > --- > tools/testing/selftests/mm/hmm-tests.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/mm/hmm-tests.c b/tools/testing/selftests/mm/hmm-tests.c > index d2cfc9b494a0..141bf63cbe05 100644 > --- a/tools/testing/selftests/mm/hmm-tests.c > +++ b/tools/testing/selftests/mm/hmm-tests.c > @@ -1657,7 +1657,7 @@ TEST_F(hmm2, double_map) > > buffer->fd = -1; > buffer->size = size; > - buffer->mirror = malloc(npages); > + buffer->mirror = malloc(size); > ASSERT_NE(buffer->mirror, NULL); > > /* Reserve a range of addresses. */ -- BR, Muhammad Usama Anjum
