Fixed wrong usage of strncat, switched to strlcpy.
While sending the string size to function to reduce
the potential for misuse in future.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_dp_mst_topology.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index ac3c273..2a146d1 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -995,19 +995,20 @@ static void drm_dp_check_port_guid(struct drm_dp_mst_branch *mstb,
static void build_mst_prop_path(struct drm_dp_mst_port *port,
struct drm_dp_mst_branch *mstb,
- char *proppath)
+ char *proppath,
+ size_t proppath_size)
{
int i;
char temp[8];
- snprintf(proppath, 255, "mst:%d", mstb->mgr->conn_base_id);
+ snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id);
for (i = 0; i < (mstb->lct - 1); i++) {
int shift = (i % 2) ? 0 : 4;
int port_num = mstb->rad[i / 2] >> shift;
- snprintf(temp, 8, "-%d", port_num);
- strncat(proppath, temp, 255);
+ snprintf(temp, sizeof(temp), "-%d", port_num);
+ strlcat(proppath, temp, proppath_size);
}
- snprintf(temp, 8, "-%d", port->port_num);
- strncat(proppath, temp, 255);
+ snprintf(temp, sizeof(temp), "-%d", port->port_num);
+ strlcat(proppath, temp, proppath_size);
}
static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
@@ -1078,7 +1079,7 @@ static void drm_dp_add_port(struct drm_dp_mst_branch *mstb,
if (created && !port->input) {
char proppath[255];
- build_mst_prop_path(port, mstb, proppath);
+ build_mst_prop_path(port, mstb, proppath, sizeof(proppath));
port->connector = (*mstb->mgr->cbs->add_connector)(mstb->mgr, port, proppath);
}
--
1.7.10.4
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