On Sat, 2021-03-06 at 03:55 +0000, Jacob, Anson wrote: > [AMD Public Use] > > Thanks Lyude for testing the patch. > > Are you referring to this issue [1] ? > > Is it reproducible after applying this patch as well ?
Yes I am - and yeah, if you're talking about the patch you originally asked me to try then yes- I'm still able to reproduce it with that patch applied > > [1] https://gitlab.freedesktop.org/drm/amd/-/issues/1473 > > -- Anson > From: Lyude Paul <ly...@redhat.com> > Sent: Friday, March 5, 2021 6:08 PM > To: Jacob, Anson <anson.ja...@amd.com>; amd-gfx@lists.freedesktop.org <amd- > g...@lists.freedesktop.org> > Cc: Deucher, Alexander <alexander.deuc...@amd.com>; Kuehling, Felix > <felix.kuehl...@amd.com> > Subject: Re: [PATCH] drm/amdkfd: Fix UBSAN shift-out-of-bounds warning > Tested-by: Lyude Paul <ly...@redhat.com> > > That just leaves the KASAN error from read_indirect_azalia_reg, thanks for the > fix! > > On Thu, 2021-03-04 at 15:08 -0500, Anson Jacob wrote: > > If get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up > > doing a shift operation where the number of bits shifted equals > > number of bits in the operand. This behaviour is undefined. > > > > Set num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the > > count is >= number of bits in the operand. > > > > Bug: > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.freedesktop.org%2Fdrm%2Famd%2F-%2Fissues%2F1472&data=04%7C01%7Canson.jacob%40amd.com%7Ce9ea7130bcd945a194aa08d8e02ba9f8%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637505826204096667%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=GEyObPt%2FnEeU9Y7K2I30RS1TBMGbbUneQ6hWkR7pJLM%3D&reserved=0 > > Reported-by: Lyude Paul <ly...@redhat.com> > > Signed-off-by: Anson Jacob <anson.ja...@amd.com> > > Reviewed-by: Alex Deucher <alexander.deuc...@amd.com> > > Reviewed-by: Felix Kuehling <felix.kuehl...@amd.com> > > --- > > .../drm/amd/amdkfd/kfd_device_queue_manager.c | 17 +++++++++++++++-- > > 1 file changed, 15 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c > > b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c > > index c37e9c4b1fb4..e7a3c496237f 100644 > > --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c > > +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c > > @@ -1128,6 +1128,9 @@ static int set_sched_resources(struct > > device_queue_manager *dqm) > > > > static int initialize_cpsch(struct device_queue_manager *dqm) > > { > > + uint64_t num_sdma_queues; > > + uint64_t num_xgmi_sdma_queues; > > + > > pr_debug("num of pipes: %d\n", get_pipes_per_mec(dqm)); > > > > mutex_init(&dqm->lock_hidden); > > @@ -1136,8 +1139,18 @@ static int initialize_cpsch(struct > device_queue_manager > > *dqm) > > dqm->active_cp_queue_count = 0; > > dqm->gws_queue_count = 0; > > dqm->active_runlist = false; > > - dqm->sdma_bitmap = ~0ULL >> (64 - get_num_sdma_queues(dqm)); > > - dqm->xgmi_sdma_bitmap = ~0ULL >> (64 - > get_num_xgmi_sdma_queues(dqm)); > > + > > + num_sdma_queues = get_num_sdma_queues(dqm); > > + if (num_sdma_queues >= BITS_PER_TYPE(dqm->sdma_bitmap)) > > + dqm->sdma_bitmap = ULLONG_MAX; > > + else > > + dqm->sdma_bitmap = (BIT_ULL(num_sdma_queues) - 1); > > + > > + num_xgmi_sdma_queues = get_num_xgmi_sdma_queues(dqm); > > + if (num_xgmi_sdma_queues >= BITS_PER_TYPE(dqm->xgmi_sdma_bitmap)) > > + dqm->xgmi_sdma_bitmap = ULLONG_MAX; > > + else > > + dqm->xgmi_sdma_bitmap = (BIT_ULL(num_xgmi_sdma_queues) - 1); > > > > INIT_WORK(&dqm->hw_exception_work, kfd_process_hw_exception); > > > -- Sincerely, Lyude Paul (she/her) Software Engineer at Red Hat Note: I deal with a lot of emails and have a lot of bugs on my plate. If you've asked me a question, are waiting for a review/merge on a patch, etc. and I haven't responded in a while, please feel free to send me another email to check on my status. I don't bite!
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