On Thu, May 3, 2018 at 12:49 AM, Kees Cook <keescook at chromium.org> wrote: > On Fri, Apr 13, 2018 at 2:24 PM, Laura Abbott <labbott at redhat.com> wrote: >> >> There's an ongoing effort to remove VLAs[1] from the kernel to eventually >> turn on -Wvla. Switch to a constant value that covers all hardware. >> >> [1] https://lkml.org/lkml/2018/3/7/621 >> >> Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com> >> Acked-by: Christian König <christian.koenig at amd.com> >> Signed-off-by: Laura Abbott <labbott at redhat.com> > > Friendly ping -- I don't see this in -next yet. Oded, does this look > okay to apply? > > Thanks! > > -Kees Thanks! Applied to amdkfd-next Oded > >> --- >> v3: Introduced a #define for the max value, switched to pr_err_once to >> avoid log flood, switched to sizeof(array) per private suggestion. >> --- >> drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c | 8 +++++--- >> drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 2 ++ >> 2 files changed, 7 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c >> index 035c351f47c5..db6d9336b80d 100644 >> --- a/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c >> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_interrupt.c >> @@ -139,10 +139,12 @@ static void interrupt_wq(struct work_struct *work) >> { >> struct kfd_dev *dev = container_of(work, struct kfd_dev, >> interrupt_work); >> + uint32_t ih_ring_entry[KFD_MAX_RING_ENTRY_SIZE]; >> >> - uint32_t ih_ring_entry[DIV_ROUND_UP( >> - dev->device_info->ih_ring_entry_size, >> - sizeof(uint32_t))]; >> + if (dev->device_info->ih_ring_entry_size > sizeof(ih_ring_entry)) { >> + dev_err_once(kfd_chardev(), "Ring entry too small\n"); >> + return; >> + } >> >> while (dequeue_ih_ring_entry(dev, ih_ring_entry)) >> dev->device_info->event_interrupt_class->interrupt_wq(dev, >> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h >> index 96a9cc0f02c9..a90db05dfe61 100644 >> --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h >> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h >> @@ -39,6 +39,8 @@ >> >> #include "amd_shared.h" >> >> +#define KFD_MAX_RING_ENTRY_SIZE 8 >> + >> #define KFD_SYSFS_FILE_MODE 0444 >> >> #define KFD_MMAP_DOORBELL_MASK 0x8000000000000ull >> -- >> 2.14.3 >> > > > > -- > Kees Cook > Pixel Security
