Re: [PATCH 5.4 4/4] sctp: sysctl: auth_enable: avoid using current->nsproxy

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: 15649fd5415eda664ef35780c2013adeb5d9c695

WARNING: Author mismatch between patch and upstream commit:
Backport author: Magali Lemes<magali.lemes@canonical.com>
Commit author: Matthieu Baerts (NGI0)<matttbe@kernel.org>

Status in newer kernel trees:
6.13.y | Present (exact SHA1)
6.12.y | Present (different SHA1: c184bc621e3c)
6.6.y | Present (different SHA1: 7ec30c54f339)
6.1.y | Present (different SHA1: 1b67030d39f2)
5.15.y | Present (different SHA1: bd2a29394235)
5.10.y | Present (different SHA1: dc583e7e5f85)

Note: The patch differs from the upstream commit:
---
1:  15649fd5415ed ! 1:  43321e75147b6 sctp: sysctl: auth_enable: avoid using current->nsproxy
    @@ Metadata
      ## Commit message ##
         sctp: sysctl: auth_enable: avoid using current->nsproxy
     
    +    commit 15649fd5415eda664ef35780c2013adeb5d9c695 upstream.
    +
         As mentioned in a previous commit of this series, using the 'net'
         structure via 'current' is not recommended for different reasons:
     
    @@ Commit message
         Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
         Link: https://patch.msgid.link/20250108-net-sysctl-current-nsproxy-v1-6-5df34b2083e8@kernel.org
         Signed-off-by: Jakub Kicinski <kuba@kernel.org>
    +    Signed-off-by: Magali Lemes <magali.lemes@canonical.com>
     
      ## net/sctp/sysctl.c ##
    -@@ net/sctp/sysctl.c: 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)
    +@@ net/sctp/sysctl.c: static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
    + 			     void __user *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);
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-5.4.y        |  Success    |  Success   |