From: Samuel Pitoiset Date: Thu, 2 Feb 2017 17:40:18 +0000 (+0100) Subject: winsys/amdgpu: avoid potential segfault in amdgpu_bo_map() X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=af303abcdbeac3b90fb760de19bed56cc40cfff4;p=mesa.git winsys/amdgpu: avoid potential segfault in amdgpu_bo_map() cs can be NULL when it comes from r600_buffer_map_sync_with_rings() to avoid doing the same checks. It was checked for write mappings but not for read mappings. Cc: "17.0" Signed-off-by: Samuel Pitoiset Reviewed-by: Marek Olšák --- diff --git a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c index 5ee27b8ede0..5b9bd8c6ddf 100644 --- a/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c +++ b/src/gallium/winsys/amdgpu/drm/amdgpu_bo.c @@ -254,14 +254,17 @@ static void *amdgpu_bo_map(struct pb_buffer *buf, * (neither one is changing it). * * Only check whether the buffer is being used for write. */ - if (cs && amdgpu_bo_is_referenced_by_cs_with_usage(cs, bo, - RADEON_USAGE_WRITE)) { - cs->flush_cs(cs->flush_data, 0, NULL); - } else { - /* Try to avoid busy-waiting in amdgpu_bo_wait. */ - if (p_atomic_read(&bo->num_active_ioctls)) - amdgpu_cs_sync_flush(rcs); + if (cs) { + if (amdgpu_bo_is_referenced_by_cs_with_usage(cs, bo, + RADEON_USAGE_WRITE)) { + cs->flush_cs(cs->flush_data, 0, NULL); + } else { + /* Try to avoid busy-waiting in amdgpu_bo_wait. */ + if (p_atomic_read(&bo->num_active_ioctls)) + amdgpu_cs_sync_flush(rcs); + } } + amdgpu_bo_wait((struct pb_buffer*)bo, PIPE_TIMEOUT_INFINITE, RADEON_USAGE_WRITE); } else {