6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Philip Yang <Philip.Yang@xxxxxxx>
commit c86ad39140bbcb9dc75a10046c2221f657e8083b upstream.
Pass pointer reference to amdgpu_bo_unref to clear the correct pointer,
otherwise amdgpu_bo_unref clear the local variable, the original pointer
not set to NULL, this could cause use-after-free bug.
Signed-off-by: Philip Yang <Philip.Yang@xxxxxxx>
Reviewed-by: Felix Kuehling <felix.kuehling@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
Signed-off-by: Vamsi Krishna Brahmajosyula <vamsi-krishna.brahmajosyula@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 14 +++++++-------
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_device.c | 4 ++--
drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 2 +-
drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c | 4 ++--
8 files changed, 16 insertions(+), 16 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
@@ -344,15 +344,15 @@ allocate_mem_reserve_bo_failed:
return r;
}
-void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void *mem_obj)
+void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void **mem_obj)
{
- struct amdgpu_bo *bo = (struct amdgpu_bo *) mem_obj;
+ struct amdgpu_bo **bo = (struct amdgpu_bo **) mem_obj;
- amdgpu_bo_reserve(bo, true);
- amdgpu_bo_kunmap(bo);
- amdgpu_bo_unpin(bo);
- amdgpu_bo_unreserve(bo);
- amdgpu_bo_unref(&(bo));
+ amdgpu_bo_reserve(*bo, true);
+ amdgpu_bo_kunmap(*bo);
+ amdgpu_bo_unpin(*bo);
+ amdgpu_bo_unreserve(*bo);
+ amdgpu_bo_unref(bo);
}
int amdgpu_amdkfd_alloc_gws(struct amdgpu_device *adev, size_t size,
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -210,7 +210,7 @@ int amdgpu_amdkfd_evict_userptr(struct k
int amdgpu_amdkfd_alloc_gtt_mem(struct amdgpu_device *adev, size_t size,
void **mem_obj, uint64_t *gpu_addr,
void **cpu_ptr, bool mqd_gfx9);
-void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void *mem_obj);
+void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void **mem_obj);
int amdgpu_amdkfd_alloc_gws(struct amdgpu_device *adev, size_t size,
void **mem_obj);
void amdgpu_amdkfd_free_gws(struct amdgpu_device *adev, void *mem_obj);
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -408,7 +408,7 @@ static int kfd_ioctl_create_queue(struct
err_create_queue:
if (wptr_bo)
- amdgpu_amdkfd_free_gtt_mem(dev->adev, wptr_bo);
+ amdgpu_amdkfd_free_gtt_mem(dev->adev, (void **)&wptr_bo);
err_wptr_map_gart:
err_alloc_doorbells:
err_bind_process:
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -673,7 +673,7 @@ kfd_interrupt_error:
kfd_doorbell_error:
kfd_gtt_sa_fini(kfd);
kfd_gtt_sa_init_error:
- amdgpu_amdkfd_free_gtt_mem(kfd->adev, kfd->gtt_mem);
+ amdgpu_amdkfd_free_gtt_mem(kfd->adev, &kfd->gtt_mem);
alloc_gtt_mem_failure:
if (kfd->gws)
amdgpu_amdkfd_free_gws(kfd->adev, kfd->gws);
@@ -693,7 +693,7 @@ void kgd2kfd_device_exit(struct kfd_dev
kfd_doorbell_fini(kfd);
ida_destroy(&kfd->doorbell_ida);
kfd_gtt_sa_fini(kfd);
- amdgpu_amdkfd_free_gtt_mem(kfd->adev, kfd->gtt_mem);
+ amdgpu_amdkfd_free_gtt_mem(kfd->adev, &kfd->gtt_mem);
if (kfd->gws)
amdgpu_amdkfd_free_gws(kfd->adev, kfd->gws);
}
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -2392,7 +2392,7 @@ static void deallocate_hiq_sdma_mqd(stru
{
WARN(!mqd, "No hiq sdma mqd trunk to free");
- amdgpu_amdkfd_free_gtt_mem(dev->adev, mqd->gtt_mem);
+ amdgpu_amdkfd_free_gtt_mem(dev->adev, &mqd->gtt_mem);
}
void device_queue_manager_uninit(struct device_queue_manager *dqm)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c
@@ -204,7 +204,7 @@ void kfd_free_mqd_cp(struct mqd_manager
struct kfd_mem_obj *mqd_mem_obj)
{
if (mqd_mem_obj->gtt_mem) {
- amdgpu_amdkfd_free_gtt_mem(mm->dev->adev, mqd_mem_obj->gtt_mem);
+ amdgpu_amdkfd_free_gtt_mem(mm->dev->adev, &mqd_mem_obj->gtt_mem);
kfree(mqd_mem_obj);
} else {
kfd_gtt_sa_free(mm->dev, mqd_mem_obj);
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1052,7 +1052,7 @@ static void kfd_process_destroy_pdds(str
if (pdd->dev->shared_resources.enable_mes)
amdgpu_amdkfd_free_gtt_mem(pdd->dev->adev,
- pdd->proc_ctx_bo);
+ &pdd->proc_ctx_bo);
/*
* before destroying pdd, make sure to report availability
* for auto suspend
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
@@ -441,9 +441,9 @@ int pqm_destroy_queue(struct process_que
if (dev->shared_resources.enable_mes) {
amdgpu_amdkfd_free_gtt_mem(dev->adev,
- pqn->q->gang_ctx_bo);
+ &pqn->q->gang_ctx_bo);
if (pqn->q->wptr_bo)
- amdgpu_amdkfd_free_gtt_mem(dev->adev, pqn->q->wptr_bo);
+ amdgpu_amdkfd_free_gtt_mem(dev->adev, (void **)&pqn->q->wptr_bo);
}
uninit_queue(pqn->q);
