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authorAndrey Ryabinin <aryabinin@virtuozzo.com>2015-09-23 15:49:29 +0300
committerJ. Bruce Fields <bfields@redhat.com>2015-10-13 00:31:05 +0300
commit0ad95472bf169a3501991f8f33f5147f792a8116 (patch)
tree3c2303ba0350c2dcd54db07c9883954ed9092c49 /fs/lockd/svc4proc.c
parentaaf91ec148910e0c2bfd135ea19f870e7196e64f (diff)
downloadlinux-0ad95472bf169a3501991f8f33f5147f792a8116.tar.xz
lockd: create NSM handles per net namespace
Commit cb7323fffa85 ("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> Cc: <stable@vger.kernel.org> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/lockd/svc4proc.c')
-rw-r--r--fs/lockd/svc4proc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index b147d1ae71fd..09c576f26c7b 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -421,7 +421,7 @@ nlm4svc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
return rpc_system_err;
}
- nlm_host_rebooted(argp);
+ nlm_host_rebooted(SVC_NET(rqstp), argp);
return rpc_success;
}