Andrey Ryabinin db13625b09 lockd: create NSM handles per net namespace ... commit 0ad95472bf169a3501991f8f33f5147f792a8116 upstream. Commit cb7323fffa ("lockd: create and use per-net NSM RPC clients on MON/UNMON requests") introduced per-net NSM RPC clients. Unfortunately this doesn't make any sense without per-net nsm_handle. E.g. the following scenario could happen Two hosts (X and Y) in different namespaces (A and B) share the same nsm struct. 1. nsm_monitor(host_X) called => NSM rpc client created, nsm->sm_monitored bit set. 2. nsm_mointor(host-Y) called => nsm->sm_monitored already set, we just exit. Thus in namespace B ln->nsm_clnt == NULL. 3. host X destroyed => nsm->sm_count decremented to 1 4. host Y destroyed => nsm_unmonitor() => nsm_mon_unmon() => NULL-ptr dereference of *ln->nsm_clnt So this could be fixed by making per-net nsm_handles list, instead of global. Thus different net namespaces will not be able share the same nsm_handle. Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-03-03 15:06:20 -08:00
..
clnt4xdr.c
clntlock.c
clntproc.c
clntxdr.c
grace.c
host.c	lockd: create NSM handles per net namespace	2016-03-03 15:06:20 -08:00
Makefile
mon.c	lockd: create NSM handles per net namespace	2016-03-03 15:06:20 -08:00
netns.h	lockd: create NSM handles per net namespace	2016-03-03 15:06:20 -08:00
svc.c	lockd: create NSM handles per net namespace	2016-03-03 15:06:20 -08:00
svc4proc.c	lockd: create NSM handles per net namespace	2016-03-03 15:06:20 -08:00
svclock.c	lockd: send correct lock when granting a delayed lock.	2014-02-22 12:41:27 -08:00
svcproc.c	lockd: create NSM handles per net namespace	2016-03-03 15:06:20 -08:00
svcshare.c
svcsubs.c
xdr.c
xdr4.c