LOCKDEBUG panic in serial tty code

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

Hi,

4.99.64 has brought a panic on mac68k LOCKDEBUG kernels:

NetBSD 4.99.64 (DEBUG) #0: Tue Jun  3 11:19:51 CEST 2008

hf@Hochstuhl:/var/obj/netbsd-builds/developer/mac68k/sys/arch/mac68k/compile/DEBUG
Apple Macintosh Quadra 650  (68040)
cpu: delay factor 1280
fpu: mc68040
total memory = 136 MB
avail memory = 127 MB

[...]

Date and time: June 3, 2008   12:13:19
init: copying out flags `-s' 3
init: copying out path `/sbin/init' 11
Enter root password, or ^D to go multi-user
Condition variable error: lockdebug_wakeup: interlocking mutex not held 
during wakeup

lock address : 0x000000000aa847a0 type     :               spin
initialized  : 0x00000000001c0138 interlock: 0x00000000003536c0

panic: LOCKDEBUG
Stopped in pid 0.6 (system) at  netbsd:cpu_Debugger+0x6: unlk a6
db> t
cpu_Debugger(2000,2001,a9adc1c,aa30e8c,aa30e9c) + 6
panic(2be5f7,aa847a0,2000,a9adc1c,aa84708) + 172
lockdebug_abort1(a9adc1c,2000,2be882,2be735,1) + 92
lockdebug_wakeup(aa847a0,1c0ffe) + aa
cv_broadcast(aa847a0,d06100,aa30f0c,265b9e,aa84708) + 1a
ttypull(aa84708) + 18
zsstart(aa84708) + 52
ttstart(aa84708,cb4020) + 12
zstty_softint1(cb400c) + 2ae
zstty_softint(cb400c,a084fa8,2d2000,aa23308,aa30fa8) + 8
zsc_intr_soft(cb4000,aa230f8,2dd501,1800be,3e9ec0) + 32
softint_thread(aa230f8) + 9c
lwp_trampoline() + e
db>

Any pointers?

        hauke

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