diff options
| author | Ursula Braun <ubraun@linux.ibm.com> | 2020-02-14 08:58:59 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-02-14 07:09:36 -0800 |
| commit | 67f562e3e147750a02b2a91d21a163fc44a1d13e (patch) | |
| tree | 61d51fd840a86ccc78795101b5f00a5a92da4272 /net | |
| parent | dc221a28d0944f1a28755caa66bf58bfa47e26d1 (diff) | |
net/smc: transfer fasync_list in case of fallback
SMC does not work together with FASTOPEN. If sendmsg() is called with
flag MSG_FASTOPEN in SMC_INIT state, the SMC-socket switches to
fallback mode. To handle the previous ioctl FIOASYNC call correctly
in this case, it is necessary to transfer the socket wait queue
fasync_list to the internal TCP socket.
Reported-by: syzbot+4b1fe8105f8044a26162@syzkaller.appspotmail.com
Fixes: ee9dfbef02d18 ("net/smc: handle sockopts forcing fallback")
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/smc/af_smc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index cee5bf4a9bb9..90988a511cd5 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -470,6 +470,8 @@ static void smc_switch_to_fallback(struct smc_sock *smc) if (smc->sk.sk_socket && smc->sk.sk_socket->file) { smc->clcsock->file = smc->sk.sk_socket->file; smc->clcsock->file->private_data = smc->clcsock; + smc->clcsock->wq.fasync_list = + smc->sk.sk_socket->wq.fasync_list; } } |