From: Christian König deathsimple@vodafone.de
Aligning offset can make it bigger than tmp->offset leading to an overrun bug in the following subtraction.
v2: Against initial suspicions this can't happen in mainline, so no need to push it into stable.
Signed-off-by: Christian König deathsimple@vodafone.de Reviewed-by: Michel Dänzer michel.daenzer@amd.com Reviewed-by: Jerome Glisse jglisse@redhat.com --- drivers/gpu/drm/radeon/radeon_sa.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_sa.c b/drivers/gpu/drm/radeon/radeon_sa.c index 4cce47e..8fbfe69 100644 --- a/drivers/gpu/drm/radeon/radeon_sa.c +++ b/drivers/gpu/drm/radeon/radeon_sa.c @@ -150,7 +150,7 @@ int radeon_sa_bo_new(struct radeon_device *rdev, offset = 0; list_for_each_entry(tmp, &sa_manager->sa_bo, list) { /* room before this object ? */ - if ((tmp->offset - offset) >= size) { + if (offset < tmp->offset && (tmp->offset - offset) >= size) { head = tmp->list.prev; goto out; }