[PATCH net 6/9] sctp: sysctl: auth_enable: avoid using current->nsproxy

Matthieu Baerts (NGI0)
2025-01-08T15:35:38Z

The 'net' structure can be obtained from the table->data using
container_of().

Note that table->data could also be used directly, but that would
increase the size of this fix, while 'sctp.ctl_sock' still needs to be
retrieved from 'net' structure.

Fixes: b14878ccb7fa ("net: sctp: cache auth_enable per endpoint")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/67769ecb.050a0220.3a8527.003f.GAE@google.com [1]
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
net/sctp/sysctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c
index a5285815264dfa9d88d1d71244f309448e97a506..9d29611621feaf0d2e8d7c923601ab374515563b 100644
--- a/net/sctp/sysctl.c
+++ b/net/sctp/sysctl.c
@@ -499,7 +499,7 @@ static int proc_sctp_do_alpha_beta(const struct ctl_table *ctl, int write,
static int proc_sctp_do_auth(const struct ctl_table *ctl, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
- struct net *net = current->nsproxy->net_ns;
+ struct net *net = container_of(ctl->data, struct net, sctp.auth_enable);
struct ctl_table tbl;
int new_value, ret;

--
2.47.1