From: Eric Dumazet Date: Wed, 22 Dec 2010 04:39:39 +0000 (+0000) Subject: ipv4: dont create routes on down devices X-Git-Tag: v2.6.37-rc8~13^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc75fc8339e7727167443469027540b283daac71;p=pandora-kernel.git ipv4: dont create routes on down devices In ip_route_output_slow(), instead of allowing a route to be created on a not UPed device, report -ENETUNREACH immediately. # ip tunnel add mode ipip remote 10.16.0.164 local 10.16.0.72 dev eth0 # (Note : tunl1 is down) # ping -I tunl1 10.1.2.3 PING 10.1.2.3 (10.1.2.3) from 192.168.18.5 tunl1: 56(84) bytes of data. (nothing) # ./a.out tunl1 # ip tunnel del tunl1 Message from syslogd@shelby at Dec 22 10:12:08 ... kernel: unregister_netdevice: waiting for tunl1 to become free. Usage count = 3 After patch: # ping -I tunl1 10.1.2.3 connect: Network is unreachable Reported-by: Nicolas Dichtel Signed-off-by: Eric Dumazet Reviewed-by: Octavian Purdila Signed-off-by: David S. Miller --- Reading git-diff-tree failed