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| author | Mikel Rychliski <mikel@mikelr.com> | 2021-06-24 07:51:20 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2021-06-30 12:56:21 +0300 |
| commit | f18f58012ee894039cd59ee8c889bf499d7a3943 (patch) | |
| tree | d85cbbe0a48d1a9b814ef95b633889417b83db78 /drivers/gpu/drm/radeon/radeon_object.h | |
| parent | cd8f318fbd266b127ffc93cc4c1eaf9a5196fafb (diff) | |
| download | linux-f18f58012ee894039cd59ee8c889bf499d7a3943.tar.xz | |
drm/radeon: Fix NULL dereference when updating memory stats
radeon_ttm_bo_destroy() is attempting to access the resource object to
update memory counters. However, the resource object is already freed when
ttm calls this function via the destroy callback. This causes an oops when
a bo is freed:
BUG: kernel NULL pointer dereference, address: 0000000000000010
RIP: 0010:radeon_ttm_bo_destroy+0x2c/0x100 [radeon]
Call Trace:
radeon_bo_unref+0x1a/0x30 [radeon]
radeon_gem_object_free+0x33/0x50 [radeon]
drm_gem_object_release_handle+0x69/0x70 [drm]
drm_gem_handle_delete+0x62/0xa0 [drm]
? drm_mode_destroy_dumb+0x40/0x40 [drm]
drm_ioctl_kernel+0xb2/0xf0 [drm]
drm_ioctl+0x30a/0x3c0 [drm]
? drm_mode_destroy_dumb+0x40/0x40 [drm]
radeon_drm_ioctl+0x49/0x80 [radeon]
__x64_sys_ioctl+0x8e/0xd0
Avoid the issue by updating the counters in the delete_mem_notify callback
instead. Also, fix memory statistic updating in radeon_bo_move() to
identify the source type correctly. The source type needs to be saved
before the move, because the moved from object may be altered by the move.
Fixes: bfa3357ef9ab ("drm/ttm: allocate resource object instead of embedding it v2")
Signed-off-by: Mikel Rychliski <mikel@mikelr.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210624045121.15643-1-mikel@mikelr.com
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_object.h')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_object.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_object.h b/drivers/gpu/drm/radeon/radeon_object.h index 1739c6a142cd..1afc7992ef91 100644 --- a/drivers/gpu/drm/radeon/radeon_object.h +++ b/drivers/gpu/drm/radeon/radeon_object.h @@ -161,7 +161,7 @@ extern void radeon_bo_get_tiling_flags(struct radeon_bo *bo, extern int radeon_bo_check_tiling(struct radeon_bo *bo, bool has_moved, bool force_drop); extern void radeon_bo_move_notify(struct ttm_buffer_object *bo, - bool evict, + unsigned int old_type, struct ttm_resource *new_mem); extern vm_fault_t radeon_bo_fault_reserve_notify(struct ttm_buffer_object *bo); extern int radeon_bo_get_surface_reg(struct radeon_bo *bo); |