From: Colin Ian King colin.king@canonical.com
[ Upstream commit 2c8bc91488fc57438c43b3bb19deb7fdbc1e5119 ]
Currently tx->bytes is being freed r->num_transactions number of times because tx is not being set correctly. Fix this by setting tx to &r->transactions[i] so that the correct objects are being freed on each loop iteration.
Addresses-Coverity: ("Double free") Fixes: 2f015ec6eab6 ("drm/dp_mst: Add sideband down request tracing + selftests") Signed-off-by: Colin Ian King colin.king@canonical.com Signed-off-by: Lyude Paul lyude@redhat.com Link: https://patchwork.freedesktop.org/patch/msgid/20191120173509.347490-1-colin.... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/drm_dp_mst_topology.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c index 141ba31cf5486..cfee59e9c85e5 100644 --- a/drivers/gpu/drm/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/drm_dp_mst_topology.c @@ -517,8 +517,10 @@ drm_dp_decode_sideband_req(const struct drm_dp_sideband_msg_tx *raw, }
if (failed) { - for (i = 0; i < r->num_transactions; i++) + for (i = 0; i < r->num_transactions; i++) { + tx = &r->transactions[i]; kfree(tx->bytes); + } return -ENOMEM; }