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author | Joel Granados <joel.granados@gmail.com> | 2023-08-09 12:50:03 +0200 |
---|---|---|
committer | Luis Chamberlain <mcgrof@kernel.org> | 2023-08-15 15:26:18 -0700 |
commit | c899710fe7f9f24dd77135875f199359f7b8b774 (patch) | |
tree | 096559bda97f2123d3a74b4557b6de3491a578cd /net/ipv4 | |
parent | 385a5dc9e578bdc43bf5196258f699f08612379b (diff) | |
download | linux-c899710fe7f9f24dd77135875f199359f7b8b774.tar.gz linux-c899710fe7f9f24dd77135875f199359f7b8b774.tar.bz2 linux-c899710fe7f9f24dd77135875f199359f7b8b774.zip |
networking: Update to register_net_sysctl_sz
Move from register_net_sysctl to register_net_sysctl_sz for all the
networking related files. Do this while making sure to mirror the NULL
assignments with a table_size of zero for the unprivileged users.
We need to move to the new function in preparation for when we change
SIZE_MAX to ARRAY_SIZE() in the register_net_sysctl macro. Failing to do
so would erroneously allow ARRAY_SIZE() to be called on a pointer. We
hold off the SIZE_MAX to ARRAY_SIZE change until we have migrated all
the relevant net sysctl registering functions to register_net_sysctl_sz
in subsequent commits.
An additional size function was added to the following files in order to
calculate the size of an array that is defined in another file:
include/net/ipv6.h
net/ipv6/icmp.c
net/ipv6/route.c
net/ipv6/sysctl_net_ipv6.c
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Diffstat (limited to 'net/ipv4')
-rw-r--r-- | net/ipv4/devinet.c | 3 | ||||
-rw-r--r-- | net/ipv4/ip_fragment.c | 3 | ||||
-rw-r--r-- | net/ipv4/route.c | 8 | ||||
-rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 3 | ||||
-rw-r--r-- | net/ipv4/xfrm4_policy.c | 3 |
5 files changed, 14 insertions, 6 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 5deac0517ef7..89087844ea6e 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -2720,7 +2720,8 @@ static __net_init int devinet_init_net(struct net *net) goto err_reg_dflt; err = -ENOMEM; - forw_hdr = register_net_sysctl(net, "net/ipv4", tbl); + forw_hdr = register_net_sysctl_sz(net, "net/ipv4", tbl, + ARRAY_SIZE(ctl_forward_entry)); if (!forw_hdr) goto err_reg_ctl; net->ipv4.forw_hdr = forw_hdr; diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index 69c00ffdcf3e..a4941f53b523 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -615,7 +615,8 @@ static int __net_init ip4_frags_ns_ctl_register(struct net *net) table[2].data = &net->ipv4.fqdir->timeout; table[3].data = &net->ipv4.fqdir->max_dist; - hdr = register_net_sysctl(net, "net/ipv4", table); + hdr = register_net_sysctl_sz(net, "net/ipv4", table, + ARRAY_SIZE(ip4_frags_ns_ctl_table)); if (!hdr) goto err_reg; diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 98d7e6ba7493..e7e9fba0357a 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -3592,6 +3592,7 @@ static struct ctl_table ipv4_route_netns_table[] = { static __net_init int sysctl_route_net_init(struct net *net) { struct ctl_table *tbl; + size_t table_size = ARRAY_SIZE(ipv4_route_netns_table); tbl = ipv4_route_netns_table; if (!net_eq(net, &init_net)) { @@ -3603,8 +3604,10 @@ static __net_init int sysctl_route_net_init(struct net *net) /* Don't export non-whitelisted sysctls to unprivileged users */ if (net->user_ns != &init_user_ns) { - if (tbl[0].procname != ipv4_route_flush_procname) + if (tbl[0].procname != ipv4_route_flush_procname) { tbl[0].procname = NULL; + table_size = 0; + } } /* Update the variables to point into the current struct net @@ -3615,7 +3618,8 @@ static __net_init int sysctl_route_net_init(struct net *net) } tbl[0].extra1 = net; - net->ipv4.route_hdr = register_net_sysctl(net, "net/ipv4/route", tbl); + net->ipv4.route_hdr = register_net_sysctl_sz(net, "net/ipv4/route", + tbl, table_size); if (!net->ipv4.route_hdr) goto err_reg; return 0; diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index 2afb0870648b..6ac890b4073f 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -1519,7 +1519,8 @@ static __net_init int ipv4_sysctl_init_net(struct net *net) } } - net->ipv4.ipv4_hdr = register_net_sysctl(net, "net/ipv4", table); + net->ipv4.ipv4_hdr = register_net_sysctl_sz(net, "net/ipv4", table, + ARRAY_SIZE(ipv4_net_table)); if (!net->ipv4.ipv4_hdr) goto err_reg; diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c index 9403bbaf1b61..57ea394ffa8c 100644 --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -178,7 +178,8 @@ static __net_init int xfrm4_net_sysctl_init(struct net *net) table[0].data = &net->xfrm.xfrm4_dst_ops.gc_thresh; } - hdr = register_net_sysctl(net, "net/ipv4", table); + hdr = register_net_sysctl_sz(net, "net/ipv4", table, + ARRAY_SIZE(xfrm4_policy_table)); if (!hdr) goto err_reg; |