[SRU J][PATCH 0/1] Fix 5.15 af_netlink regression

[Stefan Bader]

BugLink: https://bugs.launchpad.net/bugs/2126434

[SRU Justification]

== Impact ==
Upstream stable v5.15.189 / CVE-2025-38465 added
  ae8f160e7eb2 ("netlink: Fix wraparounds of sk->sk_rmem_alloc.")
which is reported to cause soft-lockups / hangs on boot when loading auditd rules.

Message from syslogd at usw745 at Sep 26 12:45:22 ...
 kernel:[22208.861925] watchdog: BUG: soft lockup - CPU#65 stuck for 26s! [kauditd:593]
[22208.862003] FS: 0000000000000000(0000) GS:ffff8e7f84c40000(0000) knlGS:0000000000000000
[22208.862004] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[22208.862005] CR2: 00007f6c313b1110 CR3: 0000006fa5c30005 CR4: 00000000007706e0
[22208.862009] PKRU: 55555554
[22208.862010] Call Trace:
[22208.862012] <TASK>
[22208.862017] ? wake_up_q+0x90/0x90
[22208.862022] netlink_unicast+0xb0/0x290
[22208.862024] kauditd_send_queue+0xb2/0x180

== Fix ==
This was fixed upstream with the following commit which is part of pending v5.15.190
  759dfc7d04ba netlink: avoid infinite retry looping in netlink_unicast()

== Testcase ==
Creating and loading auditd rules on boot (details TBD)

== Regression Potential ==
Anything related to netlink sockets.

Fedor Pchelkin (1):
  netlink: avoid infinite retry looping in netlink_unicast()

 net/netlink/af_netlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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2.43.0