@@ -1490,20 +1490,32 @@ static int smc_ioctl(struct socket *sock, unsigned int cmd,
case SIOCINQ: /* same as FIONREAD */
if (smc->sk.sk_state == SMC_LISTEN)
return -EINVAL;
- answ = atomic_read(&smc->conn.bytes_to_rcv);
+ if (smc->sk.sk_state == SMC_INIT ||
+ smc->sk.sk_state == SMC_CLOSED)
+ answ = 0;
+ else
+ answ = atomic_read(&smc->conn.bytes_to_rcv);
break;
case SIOCOUTQ:
/* output queue size (not send + not acked) */
if (smc->sk.sk_state == SMC_LISTEN)
return -EINVAL;
- answ = smc->conn.sndbuf_desc->len -
+ if (smc->sk.sk_state == SMC_INIT ||
+ smc->sk.sk_state == SMC_CLOSED)
+ answ = 0;
+ else
+ answ = smc->conn.sndbuf_desc->len -
atomic_read(&smc->conn.sndbuf_space);
break;
case SIOCOUTQNSD:
/* output queue size (not send only) */
if (smc->sk.sk_state == SMC_LISTEN)
return -EINVAL;
- answ = smc_tx_prepared_sends(&smc->conn);
+ if (smc->sk.sk_state == SMC_INIT ||
+ smc->sk.sk_state == SMC_CLOSED)
+ answ = 0;
+ else
+ answ = smc_tx_prepared_sends(&smc->conn);
break;
default:
return -ENOIOCTLCMD;
A connected SMC-socket contains addresses of descriptors for the send buffer and the rmb (receive buffer). Fields of these descriptors are used to determine the answer for certain ioctl requests. Add extra handling for unconnected SMC socket states without valid buffer descriptor addresses. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Reported-by: syzbot+e6714328fda813fc670f@syzkaller.appspotmail.com --- net/smc/af_smc.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-)