| Message ID | 20240927050752.51066-1-donettom@linux.ibm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | selftests/mm: Fixed incorrect buffer->mirror size in hmm2 double_map test | expand |
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@linux.ibm.com> Please add Fixes-by tag. Other than this, LGTM Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> > --- > 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. */
On 9/27/24 12:48, Muhammad Usama Anjum wrote: > 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@linux.ibm.com> > Please add Fixes-by tag. Other than this, LGTM Fixes-by : Donet Tom <donettom@linux.ibm.com> I have added the Fixes-by tag here. Please let me know if you would prefer that I send a V2 with this tag. > > Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Thank you Donet > >> --- >> 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. */
On Fri, 27 Sep 2024 16:21:30 +0530 Donet Tom <donettom@linux.ibm.com> wrote: > >> 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@linux.ibm.com> > > Please add Fixes-by tag. Other than this, LGTM > > Fixes-by : Donet Tom <donettom@linux.ibm.com> > > I have added the Fixes-by tag here. Please let me know if you would prefer that I send a V2 with this tag. > "Fixes:". I added Fixes: fee9f6d1b8df ("mm/hmm/test: add selftests for HMM") Cc: <stable@vger.kernel.org>
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. */
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@linux.ibm.com> --- tools/testing/selftests/mm/hmm-tests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)