[PATCH v1 1/9] sysctl: Fixes nf_conntrack_max bounds

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Newsgroups gmane.linux.scsi,gmane.linux.kernel,gmane.linux.drivers.rdma,gmane.comp.file-systems.coda.general,gmane.linux.nfs,gmane.linux.network,gmane.comp.security.firewalls.netfilter.devel
Message-ID <[email protected]>
From: Nicolas Bouchinet <[email protected]>

Bound nf_conntrack_max sysctl writings between SYSCTL_ZERO
and SYSCTL_INT_MAX.

The proc_handler has thus been updated to proc_dointvec_minmax.

Signed-off-by: Nicolas Bouchinet <[email protected]>
---
 net/netfilter/nf_conntrack_standalone.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index 7d4f0fa8b609d..40ed3ef9cb22d 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -619,7 +619,9 @@ static struct ctl_table nf_ct_sysctl_table[] = {
 		.data		= &nf_conntrack_max,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_INT_MAX,
 	},
 	[NF_SYSCTL_CT_COUNT] = {
 		.procname	= "nf_conntrack_count",
@@ -948,7 +950,9 @@ static struct ctl_table nf_ct_netfilter_table[] = {
 		.data		= &nf_conntrack_max,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_INT_MAX,
 	},
 };
 
-- 
2.48.1
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