Re: kern/60444: repeatable mutex "locking against myself" panic

["Jeff Rizzo via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/60444; it has been noted by GNATS.

From: Jeff Rizzo <riz%tastylime.net@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/60444: repeatable mutex "locking against myself" panic
Date: Mon, 13 Jul 2026 12:26:26 -0700

 I just did a test with a -current (11.99.6) kernel; the issue persists 
 and looks similar crashwise:
 
 [ 166.4109013] Mutex error: mutex_vector_enter,551: locking against myself
 
 [ 166.4109013] lock address : ffff92de2ef0e940
 [ 166.4209012] current cpu  :                  1
 [ 166.4209012] current lwp  : 0xffff92de0cdef800
 [ 166.4309006] owner field  : 0xffff92de0cdef800 wait/spin:         0/0
 
 [ 166.4409006] panic: lock error: Mutex: mutex_vector_enter,551: locking 
 against myself: lock 0xffff92de2ef0e940 cpu 1 lwp 0xffff92de0cdef800
 [ 166.4509004] cpu1: Begin traceback...
 [ 166.4509004] vpanic() at netbsd:vpanic+0x189
 [ 166.4609004] panic() at netbsd:panic+0x3c
 [ 166.4709007] lockdebug_abort() at netbsd:lockdebug_abort+0x115
 [ 166.4709007] mutex_vector_enter() at netbsd:mutex_vector_enter+0x392
 [ 166.4809004] bridge_input() at netbsd:bridge_input+0xcf5
 [ 166.4909003] vlan_input() at netbsd:vlan_input+0xd8
 [ 166.4909003] ether_input() at netbsd:ether_input+0x70f
 [ 166.5009003] bridge_input() at netbsd:bridge_input+0xd14
 [ 166.5109003] lagg_input_ethernet() at netbsd:lagg_input_ethernet+0x1f6
 [ 166.5209002] if_percpuq_softint() at netbsd:if_percpuq_softint+0x9e
 [ 166.5309003] softint_dispatch() at netbsd:softint_dispatch+0x112
 [ 166.5309003] DDB lost frame for netbsd:Xsoftintr+0x4c, trying 
 0xffff9894ab55c0f0
 [ 166.5409002] Xsoftintr() at netbsd:Xsoftintr+0x4c
 [ 166.5509001] --- interrupt ---
 [ 166.5509001] 0:
 [ 166.5509001] cpu1: End traceback...
 
 [ 166.5509001] dumping to dev 168,8 (offset=8, size=18872056):
 [ 166.5609002] dump failed: insufficient space (4194304 < 9454053)
 
 
 [ 172.1808839] rebooting...