4.4-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet edumazet@google.com
commit 787bea7748a76130566f881c2342a0be4127d182 upstream.
We will soon initialize one rhashtable per struct netns_frags in inet_frags_init_net().
This patch changes the return value to eventually propagate an error.
Signed-off-by: Eric Dumazet edumazet@google.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/net/inet_frag.h | 3 ++- net/ieee802154/6lowpan/reassembly.c | 11 ++++++++--- net/ipv4/ip_fragment.c | 12 +++++++++--- net/ipv6/netfilter/nf_conntrack_reasm.c | 12 +++++++++--- net/ipv6/reassembly.c | 11 +++++++++-- 5 files changed, 37 insertions(+), 12 deletions(-)
--- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -103,9 +103,10 @@ struct inet_frags { int inet_frags_init(struct inet_frags *); void inet_frags_fini(struct inet_frags *);
-static inline void inet_frags_init_net(struct netns_frags *nf) +static inline int inet_frags_init_net(struct netns_frags *nf) { atomic_set(&nf->mem, 0); + return 0; } void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);
--- a/net/ieee802154/6lowpan/reassembly.c +++ b/net/ieee802154/6lowpan/reassembly.c @@ -580,14 +580,19 @@ static int __net_init lowpan_frags_init_ { struct netns_ieee802154_lowpan *ieee802154_lowpan = net_ieee802154_lowpan(net); + int res;
ieee802154_lowpan->frags.high_thresh = IPV6_FRAG_HIGH_THRESH; ieee802154_lowpan->frags.low_thresh = IPV6_FRAG_LOW_THRESH; ieee802154_lowpan->frags.timeout = IPV6_FRAG_TIMEOUT;
- inet_frags_init_net(&ieee802154_lowpan->frags); - - return lowpan_frags_ns_sysctl_register(net); + res = inet_frags_init_net(&ieee802154_lowpan->frags); + if (res < 0) + return res; + res = lowpan_frags_ns_sysctl_register(net); + if (res < 0) + inet_frags_exit_net(&ieee802154_lowpan->frags, &lowpan_frags); + return res; }
static void __net_exit lowpan_frags_exit_net(struct net *net) --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -853,6 +853,8 @@ static void __init ip4_frags_ctl_registe
static int __net_init ipv4_frags_init_net(struct net *net) { + int res; + /* Fragment cache limits. * * The fragment memory accounting code, (tries to) account for @@ -876,9 +878,13 @@ static int __net_init ipv4_frags_init_ne */ net->ipv4.frags.timeout = IP_FRAG_TIME;
- inet_frags_init_net(&net->ipv4.frags); - - return ip4_frags_ns_ctl_register(net); + res = inet_frags_init_net(&net->ipv4.frags); + if (res < 0) + return res; + res = ip4_frags_ns_ctl_register(net); + if (res < 0) + inet_frags_exit_net(&net->ipv4.frags, &ip4_frags); + return res; }
static void __net_exit ipv4_frags_exit_net(struct net *net) --- a/net/ipv6/netfilter/nf_conntrack_reasm.c +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c @@ -650,12 +650,18 @@ EXPORT_SYMBOL_GPL(nf_ct_frag6_consume_or
static int nf_ct_net_init(struct net *net) { + int res; + net->nf_frag.frags.high_thresh = IPV6_FRAG_HIGH_THRESH; net->nf_frag.frags.low_thresh = IPV6_FRAG_LOW_THRESH; net->nf_frag.frags.timeout = IPV6_FRAG_TIMEOUT; - inet_frags_init_net(&net->nf_frag.frags); - - return nf_ct_frag6_sysctl_register(net); + res = inet_frags_init_net(&net->nf_frag.frags); + if (res < 0) + return res; + res = nf_ct_frag6_sysctl_register(net); + if (res < 0) + inet_frags_exit_net(&net->nf_frag.frags, &nf_frags); + return res; }
static void nf_ct_net_exit(struct net *net) --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -708,13 +708,20 @@ static void ip6_frags_sysctl_unregister(
static int __net_init ipv6_frags_init_net(struct net *net) { + int res; + net->ipv6.frags.high_thresh = IPV6_FRAG_HIGH_THRESH; net->ipv6.frags.low_thresh = IPV6_FRAG_LOW_THRESH; net->ipv6.frags.timeout = IPV6_FRAG_TIMEOUT;
- inet_frags_init_net(&net->ipv6.frags); + res = inet_frags_init_net(&net->ipv6.frags); + if (res < 0) + return res;
- return ip6_frags_ns_sysctl_register(net); + res = ip6_frags_ns_sysctl_register(net); + if (res < 0) + inet_frags_exit_net(&net->ipv6.frags, &ip6_frags); + return res; }
static void __net_exit ipv6_frags_exit_net(struct net *net)