Eric Dumazet af33da0ed9 kcm: do not attach PF_KCM sockets to avoid deadlock ...

[ Upstream commit 351050ecd6 ]

syzkaller had no problem to trigger a deadlock, attaching a KCM socket
to another one (or itself). (original syzkaller report was a very
confusing lockdep splat during a sendmsg())

It seems KCM claims to only support TCP, but no enforcement is done,
so we might need to add additional checks.

Fixes: ab7ac4eb98 ("kcm: Kernel Connection Multiplexor module")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Tom Herbert <tom@quantonium.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-09-20 08:19:55 +02:00

..

kcmproc.c

kcm: Fix locking issue

2016-08-23 16:23:12 -07:00

kcmsock.c

kcm: do not attach PF_KCM sockets to avoid deadlock

2017-09-20 08:19:55 +02:00

Kconfig

kcm: Use stream parser

2016-08-17 19:36:23 -04:00

Makefile

…