5.99.42/i386 crash (backtrace + core available)

[denbrok%uni-bonn.de@localhost (Dennis den Brok)]

Hello,

I made a 5.99.42/i386 (PAE, if it matters) system crash twice by
doing a pkgsrc bulk build and grepping over the pkgsrc src tree in
parallel. The tree is located on an ffsv2 partition mounted with
-o noatime and default parameters otherwise. The backtrace from
the most recent crash reads as follows:

_KERNEL_OPT_NAPMBIOS(200,df0ed540,c037b3be,c069f300,0,df20b5dc,c04b9712,c06e6598,0,df20b5fc)
 at 0
_KERNEL_OPT_NAPMBIOS(104,df0ed540,df20b5fc,c037b446,8404fa29,df0ed540,df20b63c,c04b9961,df20b638,df0ed540)
 at 0
cpu_reboot(104,0,df20b63c,c04b9969,df20b648,df0ed540,df20b63c,c04ba4da,df20b648,0)
 at 0xc037b47d
x86_curlwp(c067dad7,0,df0ed540,c04b3cd5,1802,0,df20b67c,c0330c90,df829668,c06c8ee8)
 at 0xc04b99be
x86_curlwp(df829668,c06c8ee8,c06548f2,c0654902,c069f300,df1d9fb0,df20b6fc,c0330ea0,df829668,c06548f2)
 at 0xc04b3d33
rw_abort(df829668,c06548f2,c0654902,c0330da3,df20b830,df0ed540,df20b6cc,c05b1424,0,0)
 at 0xc0330c90
rw_vector_enter(df829668,1,1,c059ba97,0,0,df20b7e8,df8295c8,2,1) at 0xc0330ea0
genfs_lock(df20b7e8,2,df20b76c,c049dcd0,cd7e2180,0,80,df20b7ec,c0581be5,df20b830)
 at 0xc02125fc
layer_bypass(df20b7e8,0,df0ed540,c0325558,0,0,ffffffff,1,0,c0690998) at 
0xc0363294
VOP_LOCK(e15c2170,2,df20b82c,c05a7d17,df0ed540,0,df0ed540,1000,1,0) at 
0xc05c7249
vclean(e15c2170,8,4,c0534cc4,df8295c8,0,df20b87c,c05a5f78,e15c2170,c06d2638) at 
0xc05a7de7
getcleanvnode(0,0,df20b90c,0,0,0,df20b90c,c01fa2cd,1,df20c000) at 0xc05a5b27
getnewvnode(1,df20c000,cc24fe40,df20b8f4,0,0,df20b85c,df20b84e,800,0) at 
0xc05a6052
ffs_vget(df20c000,1f1527,0,df20b9e8,5,e507f040,ec9c9812,0,df0e0010,df1d9fb0) at 
0xc01fa2cd
ufs_lookup(df20ba24,df0ed710,0,c05a760c,ded05454,2,1,2,c0690404,df8295c8) at 
0xc0533884
VOP_LOOKUP(df8295c8,df20bc2c,df20bc40,c05a4836,df20ba7c,c05a4677,ec9c9817,df0ed540,ded05440,df20bc40)
 at 0xc05c626e
lookup_once(df20bb08,df0ed710,0,df20bc18,df20bc40,df2b6cc0,df0ed540,0,df20bc40,df20bc18)
 at 0xc05a4a81
do_lookup(df20bb08,cd3c4c00,c05a3ecf,df20bb08,cd28caf0,61d9fb0,0,df20bc18,df20bc40,0)
 at 0xc05a4dd1
do_namei(df20bb08,c05a4437,df20bb08,df20bc18,dec665a8,cd3c4c00,cd3c4c00,cc110a80,c30a40c0,df20bc18)
 at 0xc05a3fca
namei(df20bc18,df0ed540,df20bbec,c05b1fc3,ec606140,6,0,c05c72c4,df20bb74,c0310749)
 at 0xc05a4446
vn_open(df20bc18,1,448,c05ad1c0,ec60634c,0,df20bc2c,c0310455,ec606140,dedf7dd4) 
at 0xc05b20c2
sys_open(df0ed540,df20bcf8,df20bd20,c04d1a12,df0ed540,df20bc06,103,0,c0420bea,0)
 at 0xc05ad1e8
sy_call(c06c5dbc,df0ed540,df20bcf8,df20bd20,c0339332,0,df0ed540,df20bd00,c0339329,bb5130e0)
 at 0xc04d1d69
syscall(df20bd48,b3,ab,1f,1f,bb5130e0,bb486213,bf7fe658,bb5130e0,bf7fe69c) at 
0xc04d1c50

I'll happily provide more information if someone interested tells
me what is needed. I could also make the 327MB of dump data available
if absolutely necessary.

Thanks,
Dennis den Brok