idr_find() can return a NULL value to 'flow' which is used without a
check. The patch adds a check to avoid potential NULL pointer dereference.
In case of mlx5_fpga_sbu_conn_sendmsg() failure, free buf allocated
using kzalloc.
Fixes:
ab412e1dd7db ("net/mlx5: Accel, add TLS rx offload routines")
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
void *cmd;
int ret;
+ rcu_read_lock();
+ flow = idr_find(&mdev->fpga->tls->rx_idr, ntohl(handle));
+ rcu_read_unlock();
+
+ if (!flow) {
+ WARN_ONCE(1, "Received NULL pointer for handle\n");
+ return -EINVAL;
+ }
+
buf = kzalloc(size, GFP_ATOMIC);
if (!buf)
return -ENOMEM;
cmd = (buf + 1);
- rcu_read_lock();
- flow = idr_find(&mdev->fpga->tls->rx_idr, ntohl(handle));
- rcu_read_unlock();
mlx5_fpga_tls_flow_to_cmd(flow, cmd);
MLX5_SET(tls_cmd, cmd, swid, ntohl(handle));
buf->complete = mlx_tls_kfree_complete;
ret = mlx5_fpga_sbu_conn_sendmsg(mdev->fpga->tls->conn, buf);
+ if (ret < 0)
+ kfree(buf);
return ret;
}