Ursula Braun 90e0e78bfa net/smc: add fallback check to connect() ... commit 86434744fe upstream. FASTOPEN setsockopt() or sendmsg() may switch the SMC socket to fallback mode. Once fallback mode is active, the native TCP socket functions are called. Nevertheless there is a small race window, when FASTOPEN setsockopt/sendmsg runs in parallel to a connect(), and switch the socket into fallback mode before connect() takes the sock lock. Make sure the SMC-specific connect setup is omitted in this case. This way a syzbot-reported refcount problem is fixed, triggered by different threads running non-blocking connect() and FASTOPEN_KEY setsockopt. Reported-by: syzbot+96d3f9ff6a86d37e44c8@syzkaller.appspotmail.com Fixes: 6d6dd528d5 ("net/smc: fix refcount non-blocking connect() -part 2") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-01-04 19:18:37 +01:00
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Kconfig	…
Makefile	…
af_smc.c	net/smc: add fallback check to connect()	2020-01-04 19:18:37 +01:00
smc.h	…
smc_cdc.c	…
smc_cdc.h	…
smc_clc.c	…
smc_clc.h	…
smc_close.c	…
smc_close.h	…
smc_core.c	net/smc: increase device refcount for added link group	2019-12-31 16:43:53 +01:00
smc_core.h	…
smc_diag.c	…
smc_ib.c	…
smc_ib.h	…
smc_ism.c	…
smc_ism.h	…
smc_llc.c	…
smc_llc.h	…
smc_netns.h	…
smc_pnet.c	net/smc: fix ethernet interface refcounting	2019-11-06 17:44:32 -08:00
smc_pnet.h	…
smc_rx.c	net/smc: receive pending data after RCV_SHUTDOWN	2019-10-10 19:08:41 -07:00
smc_rx.h	…
smc_tx.c	net/smc: make sure EPOLLOUT is raised	2019-08-20 12:25:14 -07:00
smc_tx.h	…
smc_wr.c	…
smc_wr.h	…