[59/67] ipv4: flush route cache after change accept_local
From: Greg KH <gregkh@suse.de>
Date: 2012-01-03 22:37:38
Also in:
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3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Weiping Pan <redacted> [ Upstream commit d01ff0a049f749e0bf10a35bb23edd012718c8c2 ] After reset ipv4_devconf->data[IPV4_DEVCONF_ACCEPT_LOCAL] to 0, we should flush route cache, or it will continue receive packets with local source address, which should be dropped. Signed-off-by: Weiping Pan <redacted> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- net/ipv4/devinet.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c@@ -1490,7 +1490,9 @@ static int devinet_conf_proc(ctl_table * void __user *buffer, size_t *lenp, loff_t *ppos) { + int old_value = *(int *)ctl->data; int ret = proc_dointvec(ctl, write, buffer, lenp, ppos); + int new_value = *(int *)ctl->data; if (write) { struct ipv4_devconf *cnf = ctl->extra1;
@@ -1501,6 +1503,9 @@ static int devinet_conf_proc(ctl_table * if (cnf == net->ipv4.devconf_dflt) devinet_copy_dflt_conf(net, i); + if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1) + if ((new_value == 0) && (old_value != 0)) + rt_cache_flush(net, 0); } return ret;