db> trace
Tracing pid 8528 tid 100134 td 0xc2f0e600
kdb_enter(c07a6126,c080c740,c07b3ac8,dbe299e8,100) at kdb_enter+0x30
panic(c07b3ac8,c2170600,2db,0,c07b3a82) at panic+0xd5
ufs_dirbad(c4488e70,0,c07b3a82,0,dbe29a5c) at ufs_dirbad+0x4d
ufs_lookup(dbe29afc,dbe29b38,c0604171,c07ef1c0,dbe29afc) at ufs_lookup+0x3e7
VOP_CACHEDLOOKUP_APV(c07ef1c0,dbe29afc,dbe29c88,c2f0e600,c3bd7d80) at VOP_CACHEDLOOKUP_APV+0x3e
vfs_cache_lookup(dbe29ba4,dbe29b50,c4525990,dbe29c60,dbe29bc0) at vfs_cache_lookup+0xd1
VOP_LOOKUP_APV(c07ef1c0,dbe29ba4,c2f0e600,c2085888,0) at VOP_LOOKUP_APV+0x54
lookup(dbe29c60,c4177400,400,dbe29c7c,0) at lookup+0x4a8
namei(dbe29c60,dbe29c5c,c057592c,c32b1300,dbe29c5c) at namei+0x468
kern_chdir(c2f0e600,80ed108,0,dbe29d30,c0761f40) at kern_chdir+0x42
chdir(c2f0e600,dbe29d04,4,16,c2f0e600) at chdir+0x22
syscall(816003b,816003b,bfbc003b,bfbf2f90,80f1268) at syscall+0x370
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (12, FreeBSD ELF32, chdir), eip = 0x281657ef, esp = 0xbfbf1f6c, ebp = 0xbfbf33a8 ---