From: Amir Shehata <amir.shehata@intel.com>
Date: Thu, 14 Jul 2016 23:51:32 +0000 (-0700)
Subject: LU-7734 lnet: Fix crash in router_proc.c
X-Git-Tag: 2.9.53~47^2~10
X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=commitdiff_plain;h=c9d48ea8a5717a061bcaccbec0fbc73661299e62;ds=sidebyside

LU-7734 lnet: Fix crash in router_proc.c

Fixed NULL access in the case when a peer is a remote
peer. In that case lpni_net is NULL.

Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Change-Id: Ida234ff016b2bdc305acf74df0f99600d2555e27
Reviewed-on: http://review.whamcloud.com/21327
---

diff --git a/lnet/lnet/router_proc.c b/lnet/lnet/router_proc.c
index 7636202..209adab 100644
--- a/lnet/lnet/router_proc.c
+++ b/lnet/lnet/router_proc.c
@@ -501,7 +501,8 @@ proc_lnet_peers(struct ctl_table *table, int write, void __user *buffer,
 			int nrefs = atomic_read(&peer->lpni_refcount);
 			int lastalive = -1;
 			char *aliveness = "NA";
-			int maxcr = peer->lpni_net->net_tunables.lct_peer_tx_credits;
+			int maxcr = (peer->lpni_net) ?
+			  peer->lpni_net->net_tunables.lct_peer_tx_credits : 0;
 			int txcr = peer->lpni_txcredits;
 			int mintxcr = peer->lpni_mintxcredits;
 			int rtrcr = peer->lpni_rtrcredits;