Dmitry Vyukov wrote on Thu, Oct 11, 2018: > > Now we are talking! > > We generally assume that all modules are simply compiled into kernel. > > At least that's we have on syzbot. If somebody can't compile them in, > > we can suggest to add modprobe into init. > > So this boils down to just writing to /sys/module/rdma_rxe/parameters/add. > > This fails for me: > > root@syzkaller:~# echo -n syz1 > /sys/module/rdma_rxe/parameters/add > [20992.905406] rdma_rxe: interface syz1 not found > bash: echo: write error: Invalid argument
Works here, I just did: [root@f2 ~]# modprobe rdma_rxe [root@f2 ~]# echo -n ens3 > /sys/module/rdma_rxe/parameters/add dmesg says: [ 35.595534] rdma_rxe: set rxe0 active [ 35.595541] rdma_rxe: added rxe0 to ens3 Actually for a dummy interface if I try the echo directly the echo works, and a verb device is created, and I just confirmed I can use it... so not sure why rxe_cfg said EINVAL earlier... [root@f2 ~]# ip link add dummy0 type dummy [root@f2 ~]# ip link set dummy0 up [root@f2 ~]# ip addr add 10.1.1.1/24 dev dummy0 [root@f2 ~]# modprobe rdma_rxe [root@f2 ~]# echo -n dummy0 > /sys/module/rdma_rxe/parameters/add (then using my test client: [root@f2 src]# ./rcat -s INFO: trans_rdma.c (879), msk_cma_event_handler: CONNECT_REQUEST INFO: trans_rdma.c (862), msk_cma_event_handler: ESTABLISHED INFO: trans_rdma.c (917), msk_cma_event_handler: DISCONNECT EVENT... [root@f2 src]# ./rcat -c 10.1.1.1 INFO: trans_rdma.c (862), msk_cma_event_handler: ESTABLISHED ^C ) I assume your syz1 interface is a tap device as you were saying earlier? Got anything in dmesg? -- Dominique
