diff options
| author | Guvenc Gulce <[email protected]> | 2021-06-25 17:11:02 +0200 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2021-06-25 11:53:51 -0700 |
| commit | 17081633e22d83be928a779fd7acd04b247dec90 (patch) | |
| tree | cbbad7d128615675594f5786c6fc745c2b72d30f | |
| parent | 4e3db44a242a4e2afe33b59793898ecbb61d478e (diff) | |
net/smc: Ensure correct state of the socket in send path
When smc_sendmsg() is called before the SMC socket initialization has
completed, smc_tx_sendmsg() will access un-initialized fields of the
SMC socket which results in a null-pointer dereference.
Fix this by checking the socket state first in smc_tx_sendmsg().
Fixes: e0e4b8fa5338 ("net/smc: Add SMC statistics support")
Reported-by: [email protected]
Reviewed-by: Karsten Graul <[email protected]>
Signed-off-by: Guvenc Gulce <[email protected]>
Signed-off-by: Karsten Graul <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
| -rw-r--r-- | net/smc/smc_tx.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c index 075c4f4b41cf..289025cd545a 100644 --- a/net/smc/smc_tx.c +++ b/net/smc/smc_tx.c @@ -154,6 +154,9 @@ int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len) goto out_err; } + if (sk->sk_state == SMC_INIT) + return -ENOTCONN; + if (len > conn->sndbuf_desc->len) SMC_STAT_RMB_TX_SIZE_SMALL(smc, !conn->lnk); @@ -164,8 +167,6 @@ int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len) SMC_STAT_INC(smc, urg_data_cnt); while (msg_data_left(msg)) { - if (sk->sk_state == SMC_INIT) - return -ENOTCONN; if (smc->sk.sk_shutdown & SEND_SHUTDOWN || (smc->sk.sk_err == ECONNABORTED) || conn->killed) |