[RFC PATCH net-next 5/7] net: ipv6: mld: restrict min/max of sysctl force_mld_version
From: Daniel Borkmann <hidden>
Date: 2013-08-30 16:58:40
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
Restrict minimum and maximum values that are allowed to be set by the administrator for force_mld_version into sysctl: 0 - No enforcement of any MLD version 1 - Enforce to use MLD version 1 2 - Enforce to use MLD version 2 Signed-off-by: Daniel Borkmann <redacted> Cc: Hannes Frederic Sowa <redacted> --- net/ipv6/addrconf.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index a7183fc..dde76d4 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c@@ -106,6 +106,9 @@ #define INFINITY_LIFE_TIME 0xFFFFFFFF +static int zero = 0; +static int two = 2; + static inline u32 cstamp_delta(unsigned long cstamp) { return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
@@ -4842,7 +4845,9 @@ static struct addrconf_sysctl_table .data = &ipv6_devconf.force_mld_version, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = proc_dointvec, + .proc_handler = proc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &two, }, { .procname = "mldv1_unsolicited_report_interval",
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1.7.11.7