| Message ID | 170440924347.3570725.6271367271629367301.stgit@djiang5-mobl3 |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v3,1/4] cxl: Add check for NULL ptr after calling find_cxl_root() | expand |
diff --git a/drivers/cxl/core/cdat.c b/drivers/cxl/core/cdat.c index cd84d87f597a..3dce4a201ddd 100644 --- a/drivers/cxl/core/cdat.c +++ b/drivers/cxl/core/cdat.c @@ -176,6 +176,9 @@ static int cxl_port_perf_data_calculate(struct cxl_port *port, } root_port = find_cxl_root(port); + if (!root_port) + return -ENODEV; + cxl_root = to_cxl_root(root_port); if (!cxl_root->ops || !cxl_root->ops->qos_class) return -EOPNOTSUPP;
In cxl_port_perf_data_calculate, the function fails to check for NULL ptr after calling find_cxl_root(). Add check to avoid NULL ptr dereferencing. Fixes: 7a4f148dd8d5 ("cxl: Compute the entire CXL path latency and bandwidth data") Signed-off-by: Dave Jiang <dave.jiang@intel.com> --- drivers/cxl/core/cdat.c | 3 +++ 1 file changed, 3 insertions(+)