LOR netlink / so_rcv triggered by acpi_UserNotify -> devctl_notify

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From: Bjoern A. Zeeb <bzeeb-lists_at_lists.zabbadoz.net>
Date: Mon, 12 May 2025 13:13:55 UTC

[73275.585599] lock order reversal:
[73275.585623]  1st 0xfffffe003c3665b0 netlink lock (netlink lock, rm) @ sys/netlink/netlink_domain.c:219
[73275.585670]  2nd 0xfffff800451949e0 so_rcv (so_rcv, sleep mutex) @ sys/netlink/netlink_io.c:229
[73275.586487] lock order netlink lock -> so_rcv attempted at:
[73275.586509] #0 0xffffffff80bdadc1 at witness_checkorder+0xbe1
[73275.587246] #1 0xffffffff80b3bee1 at __mtx_lock_flags+0x91
[73275.588757] #2 0xffffffff80de364d at nl_send+0xad
[73275.588773] #3 0xffffffff80ddf5cf at nl_send_group+0x1df
[73275.589534] #4 0xffffffff80de3a62 at _nlmsg_flush+0x22
[73275.590052] #5 0xffffffff837942c6 at sysevent_send+0x1e6
[73275.591013] #6 0xffffffff80b01f13 at devctl_notify+0x53
[73275.591018] #7 0xffffffff804b931a at acpi_UserNotify+0x7a
[73275.591142] #8 0xffffffff821604ca at acpi_ibm_notify+0x40a
[73275.591344] #9 0xffffffff803e8530 at AcpiEvNotifyDispatch+0x40
[73275.591509] #10 0xffffffff804b6250 at acpi_task_execute+0x10
[73275.591514] #11 0xffffffff80bccfc2 at taskqueue_run_locked+0x1c2
[73275.591678] #12 0xffffffff80bcdeb3 at taskqueue_thread_loop+0xd3
[73275.591833] #13 0xffffffff80b15042 at fork_exit+0x82
[73275.592029] #14 0xffffffff81002f2e at fork_trampoline+0xe


-- 
Bjoern A. Zeeb                                                     r15:7