From 7c5f3874d9d697f9e21acbdd8be9e65af6f5a880 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 13 Nov 2013 15:25:35 -0500 Subject: drm/radeon/vm: don't attempt to update ptes if ib allocation fails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit 4cc948b94a222c310ae089c36718aac7a03aec90 upstream. If we fail to allocate an indirect buffer (ib) when updating the ptes, return an error instead of trying to use the ib. Avoids a null pointer dereference. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=58621 v2 (chk): rebased on drm-fixes-3.12 for stable inclusion Reviewed-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/radeon_gart.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/radeon') diff --git a/drivers/gpu/drm/radeon/radeon_gart.c b/drivers/gpu/drm/radeon/radeon_gart.c index 5ce190b8bd1f..2915a1c56934 100644 --- a/drivers/gpu/drm/radeon/radeon_gart.c +++ b/drivers/gpu/drm/radeon/radeon_gart.c @@ -1157,6 +1157,8 @@ int radeon_vm_bo_update_pte(struct radeon_device *rdev, return -ENOMEM; r = radeon_ib_get(rdev, ridx, &ib, NULL, ndw * 4); + if (r) + return r; ib.length_dw = 0; r = radeon_vm_update_pdes(rdev, vm, &ib, bo_va->soffset, bo_va->eoffset); -- cgit v1.2.3