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authorEric Dumazet <edumazet@google.com>2018-04-04 08:35:10 -0700
committerDavid S. Miller <davem@davemloft.net>2018-04-04 12:04:59 -0400
commit3d23401283e80ceb03f765842787e0e79ff598b7 (patch)
treea07bee3cbc8781374c747f6cbb20c51d6a650aad /net/ipv6
parent4b2e6877b8793b60abb75c15abaaa4377807a358 (diff)
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inet: frags: fix ip6frag_low_thresh boundary
Giving an integer to proc_doulongvec_minmax() is dangerous on 64bit arches, since linker might place next to it a non zero value preventing a change to ip6frag_low_thresh. ip6frag_low_thresh is not used anymore in the kernel, but we do not want to prematuraly break user scripts wanting to change it. Since specifying a minimal value of 0 for proc_doulongvec_minmax() is moot, let's remove these zero values in all defrag units. Fixes: 6e00f7dd5e4e ("ipv6: frags: fix /proc/sys/net/ipv6/ip6frag_low_thresh") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/netfilter/nf_conntrack_reasm.c2
-rw-r--r--net/ipv6/reassembly.c2
2 files changed, 0 insertions, 4 deletions
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 3622aac343ae..5e0332014c17 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -55,7 +55,6 @@ static const char nf_frags_cache_name[] = "nf-frags";
static struct inet_frags nf_frags;
#ifdef CONFIG_SYSCTL
-static long zero;
static struct ctl_table nf_ct_frag6_sysctl_table[] = {
{
@@ -71,7 +70,6 @@ static struct ctl_table nf_ct_frag6_sysctl_table[] = {
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
- .extra1 = &zero,
.extra2 = &init_net.nf_frag.frags.high_thresh
},
{
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 70e4a578b2fb..4979610287e2 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -548,7 +548,6 @@ static const struct inet6_protocol frag_protocol = {
};
#ifdef CONFIG_SYSCTL
-static int zero;
static struct ctl_table ip6_frags_ns_ctl_table[] = {
{
@@ -565,7 +564,6 @@ static struct ctl_table ip6_frags_ns_ctl_table[] = {
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = proc_doulongvec_minmax,
- .extra1 = &zero,
.extra2 = &init_net.ipv6.frags.high_thresh
},
{