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sysctl: treewide: constify ctl_table_header::ctl_table_arg

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To be able to constify instances of struct ctl_tables it is necessary to
remove ways through which non-const versions are exposed from the
sysctl core.
One of these is the ctl_table_arg member of struct ctl_table_header.

Constify this reference as a prerequisite for the full constification of
struct ctl_table instances.
No functional change.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Weißschuh 2024-04-18 11:40:08 +02:00 committed by David S. Miller
parent 8442f8ba26
commit bfa858f220
27 changed files with 30 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/vrf.c
View File

@ -1971,7 +1971,7 @@ static int vrf_netns_init_sysctl(struct net *net, struct netns_vrf *nn_vrf)
static void vrf_netns_exit_sysctl(struct net *net)
{
struct netns_vrf *nn_vrf = net_generic(net, vrf_net_id);
struct ctl_table *table;
const struct ctl_table *table;
table = nn_vrf->ctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(nn_vrf->ctl_hdr);

2
include/linux/sysctl.h
View File

@ -182,7 +182,7 @@ struct ctl_table_header {
struct rcu_head rcu;
};
struct completion *unregistering;
struct ctl_table *ctl_table_arg;
const struct ctl_table *ctl_table_arg;
struct ctl_table_root *root;
struct ctl_table_set *set;
struct ctl_dir *parent;

2
ipc/ipc_sysctl.c
View File

@ -306,7 +306,7 @@ bool setup_ipc_sysctls(struct ipc_namespace *ns)
void retire_ipc_sysctls(struct ipc_namespace *ns)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = ns->ipc_sysctls->ctl_table_arg;
unregister_sysctl_table(ns->ipc_sysctls);

2
ipc/mq_sysctl.c
View File

@ -160,7 +160,7 @@ bool setup_mq_sysctls(struct ipc_namespace *ns)
void retire_mq_sysctls(struct ipc_namespace *ns)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = ns->mq_sysctls->ctl_table_arg;
unregister_sysctl_table(ns->mq_sysctls);

2
kernel/ucount.c
View File

@ -119,7 +119,7 @@ bool setup_userns_sysctls(struct user_namespace *ns)
void retire_userns_sysctls(struct user_namespace *ns)
{
#ifdef CONFIG_SYSCTL
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = ns->sysctls->ctl_table_arg;
unregister_sysctl_table(ns->sysctls);

2
net/ax25/sysctl_net_ax25.c
View File

@ -171,7 +171,7 @@ int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
{
struct ctl_table_header *header = ax25_dev->sysheader;
struct ctl_table *table;
const struct ctl_table *table;
if (header) {
ax25_dev->sysheader = NULL;

2
net/bridge/br_netfilter_hooks.c
View File

@ -1275,7 +1275,7 @@ static int br_netfilter_sysctl_init_net(struct net *net)
static void br_netfilter_sysctl_exit_net(struct net *net,
struct brnf_net *brnet)
{
struct ctl_table *table = brnet->ctl_hdr->ctl_table_arg;
const struct ctl_table *table = brnet->ctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(brnet->ctl_hdr);
if (!net_eq(net, &init_net))

2
net/core/sysctl_net_core.c
View File

@ -743,7 +743,7 @@ err_dup:
static __net_exit void sysctl_core_net_exit(struct net *net)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = net->core.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->core.sysctl_hdr);

2
net/ieee802154/6lowpan/reassembly.c
View File

@ -399,7 +399,7 @@ err_alloc:
static void __net_exit lowpan_frags_ns_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
struct netns_ieee802154_lowpan *ieee802154_lowpan =
net_ieee802154_lowpan(net);

2
net/ipv4/devinet.c
View File

@ -2749,7 +2749,7 @@ err_alloc_all:
static __net_exit void devinet_exit_net(struct net *net)
{
#ifdef CONFIG_SYSCTL
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = net->ipv4.forw_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.forw_hdr);

2
net/ipv4/ip_fragment.c
View File

@ -632,7 +632,7 @@ err_alloc:
static void __net_exit ip4_frags_ns_ctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->ipv4.frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.frags_hdr);

2
net/ipv4/route.c
View File

@ -3576,7 +3576,7 @@ err_dup:
static __net_exit void sysctl_route_net_exit(struct net *net)
{
struct ctl_table *tbl;
const struct ctl_table *tbl;
tbl = net->ipv4.route_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv4.route_hdr);

2
net/ipv4/sysctl_net_ipv4.c
View File

@ -1554,7 +1554,7 @@ err_alloc:
static __net_exit void ipv4_sysctl_exit_net(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
kfree(net->ipv4.sysctl_local_reserved_ports);
table = net->ipv4.ipv4_hdr->ctl_table_arg;

2
net/ipv4/xfrm4_policy.c
View File

@ -186,7 +186,7 @@ err_alloc:
static __net_exit void xfrm4_net_sysctl_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
if (!net->ipv4.xfrm4_hdr)
return;

2
net/ipv6/addrconf.c
View File

@ -7238,7 +7238,7 @@ out:
static void __addrconf_sysctl_unregister(struct net *net,
struct ipv6_devconf *p, int ifindex)
{
struct ctl_table *table;
const struct ctl_table *table;
if (!p->sysctl_header)
return;

2
net/ipv6/netfilter/nf_conntrack_reasm.c
View File

@ -105,7 +105,7 @@ err_alloc:
static void __net_exit nf_ct_frags6_sysctl_unregister(struct net *net)
{
struct nft_ct_frag6_pernet *nf_frag = nf_frag_pernet(net);
struct ctl_table *table;
const struct ctl_table *table;
table = nf_frag->nf_frag_frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(nf_frag->nf_frag_frags_hdr);

2
net/ipv6/reassembly.c
View File

@ -487,7 +487,7 @@ err_alloc:
static void __net_exit ip6_frags_ns_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->ipv6.sysctl.frags_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->ipv6.sysctl.frags_hdr);

6
net/ipv6/sysctl_net_ipv6.c
View File

@ -313,9 +313,9 @@ out_ipv6_table:
static void __net_exit ipv6_sysctl_net_exit(struct net *net)
{
struct ctl_table *ipv6_table;
struct ctl_table *ipv6_route_table;
struct ctl_table *ipv6_icmp_table;
const struct ctl_table *ipv6_table;
const struct ctl_table *ipv6_route_table;
const struct ctl_table *ipv6_icmp_table;
ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;

2
net/ipv6/xfrm6_policy.c
View File

@ -218,7 +218,7 @@ err_alloc:
static void __net_exit xfrm6_net_sysctl_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
if (!net->ipv6.sysctl.xfrm6_hdr)
return;

4
net/mpls/af_mpls.c
View File

@ -1422,7 +1422,7 @@ static void mpls_dev_sysctl_unregister(struct net_device *dev,
struct mpls_dev *mdev)
{
struct net *net = dev_net(dev);
struct ctl_table *table;
const struct ctl_table *table;
if (!mdev->sysctl)
return;
@ -2690,7 +2690,7 @@ static void mpls_net_exit(struct net *net)
{
struct mpls_route __rcu **platform_label;
size_t platform_labels;
struct ctl_table *table;
const struct ctl_table *table;
unsigned int index;
table = net->mpls.ctl->ctl_table_arg;

2
net/mptcp/ctrl.c
View File

@ -198,7 +198,7 @@ err_alloc:
static void mptcp_pernet_del_table(struct mptcp_pernet *pernet)
{
struct ctl_table *table = pernet->ctl_table_hdr->ctl_table_arg;
const struct ctl_table *table = pernet->ctl_table_hdr->ctl_table_arg;
unregister_net_sysctl_table(pernet->ctl_table_hdr);

2
net/netfilter/nf_conntrack_standalone.c
View File

@ -1122,7 +1122,7 @@ out_unregister_netfilter:
static void nf_conntrack_standalone_fini_sysctl(struct net *net)
{
struct nf_conntrack_net *cnet = nf_ct_pernet(net);
struct ctl_table *table;
const struct ctl_table *table;
table = cnet->sysctl_header->ctl_table_arg;
unregister_net_sysctl_table(cnet->sysctl_header);

2
net/netfilter/nf_log.c
View File

@ -514,7 +514,7 @@ err_alloc:
static void netfilter_log_sysctl_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->nf.nf_log_dir_header->ctl_table_arg;
unregister_net_sysctl_table(net->nf.nf_log_dir_header);

2
net/sctp/sysctl.c
View File

@ -624,7 +624,7 @@ int sctp_sysctl_net_register(struct net *net)
void sctp_sysctl_net_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->sctp.sysctl_header->ctl_table_arg;
unregister_net_sysctl_table(net->sctp.sysctl_header);

2
net/smc/smc_sysctl.c
View File

@ -133,7 +133,7 @@ err_alloc:
void __net_exit smc_sysctl_net_exit(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->smc.smc_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->smc.smc_hdr);

2
net/unix/sysctl_net_unix.c
View File

@ -52,7 +52,7 @@ err_alloc:
void unix_sysctl_unregister(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->unx.ctl->ctl_table_arg;
unregister_net_sysctl_table(net->unx.ctl);

2
net/xfrm/xfrm_sysctl.c
View File

@ -76,7 +76,7 @@ out_kmemdup:
void __net_exit xfrm_sysctl_fini(struct net *net)
{
struct ctl_table *table;
const struct ctl_table *table;
table = net->xfrm.sysctl_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->xfrm.sysctl_hdr);