Poor Man FreeBSD DDB stacktraces

gistfile1.txt

CODE:

int debug = 1;
sysctlbyname("debug.kdb.enter", NULL, NULL, &debug, sizeof(debug));

WHERE:

libc - abort
login - bail

PROC: /sbin/newfs -U /dev/md2
db> bt
Tracing pid 23 tid 100048 td 0x8094cb40
[kernel]        kdb_enter+0x4c (?,?,?,?)                    ra 801e2924 sp c37fdba8 sz 32 subr 801e2820
[kernel]        kdb_enter+0x120 (?,?,?,?)                   ra 801a4b04 sp c37fdbc8 sz 48 subr 801e2884
[kernel]        syscall_helper_unregister+0x778 (?,?,?,?)   ra 801a74f8 sp c37fdbf8 sz 56 subr 801a4a58
[kernel]        sysctl_find_oid+0x534 (?,?,?,?)             ra 801a78c8 sp c37fdc30 sz 88 subr 801a73d0
[kernel]        userland_sysctl+0xfc (8094cb40,?,?,?)       ra 801a7a78 sp c37fdc88 sz 104 subr 801a77cc
[kernel]        sys___sysctl+0xa0 (?,?,?,?)                 ra 8038aae0 sp c37fdcf0 sz 160 subr 801a79d8
[kernel]        trap+0xf54 (?,?,?,?)                        ra 80378784 sp c37fdd90 sz 240 subr 80389b8c
[kernel]        MipsUserGenException+0x10c (?,?,?,?)        ra 00000000 sp c37fde80 sz 0 subr 80378678
--- exception, cause 7fffc9d8 badvaddr 0 ---
[/lib/libc.so.7]        (0 404aa000 40650000) 0x190be4  0x4063abe4 (?,?,?,?) ra 40639ff4 sp 7fffc898 sz 0 subr 4063abd8
[/lib/libc.so.7]        (0 404aa000 40650000) 0x18fff4  0x40639ff4 (?,?,?,?) ra 4063759c sp 7fffc898 sz 64 subr 40639f8c
[/lib/libc.so.7]        (0 404aa000 40650000) 0x18d59c  0x4063759c (?,?,?,?) ra 40636c3c sp 7fffc8d8 sz 160 subr 4063752c
[/lib/libc.so.7]        (0 404aa000 40650000) 0x18cc3c  abort (?,?,?,?) ra 40633630 sp 7fffc978 sz 80 subr 40636bdc
[/lib/libc.so.7]        (0 404aa000 40650000) 0x189630  getentropy (?,?,?,?) ra 40630318 sp 7fffc9c8 sz 80 subr 4063345c
[/lib/libc.so.7]        (0 404aa000 40650000) 0x186318  arc4random_uniform (?,?,?,?) ra 40630680 sp 7fffca18 sz 104 subr 406302e8
[/lib/libc.so.7]        (0 404aa000 40650000) 0x186680  arc4random (?,?,?,?) ra 00402efc sp 7fffca80 sz 72 subr 40630624
[/sbin/newfs]           (0 400000 40a000) 0x2efc        0x402efc (?,?,?,?)   ra 00404f9c sp 7fffcac8 sz 32 subr 402ebc
[/sbin/newfs]           (0 400000 40a000) 0x4f9c        0x404f9c (0,7fffef7b,?,?) ra 00402b28 sp 7fffcae8 sz 8696 subr 403b60
[/sbin/newfs]           (0 400000 40a000) 0x2b28        0x402b28 (?,7fffee78,?,?) ra 00401340 sp 7fffece0 sz 328 subr 401b20
[/sbin/newfs]           (0 400000 40a000) 0x1340        0x401340 (?,?,?,?)   ra 00401260 sp 7fffee28 sz 56 subr 40126c
[/sbin/newfs]           (0 400000 40a000) 0x1260        0x401260 (?,?,?,?)   ra 00000000 sp 7fffee60 sz 40 subr 4011dc

PROC: db> show proc
Process 153 (login) at 0x80932a98:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 1 at 0x80679000
 ABI: FreeBSD ELF32
 arguments: login
 repear: 0x80679000 reapsubtree: 153
 sigparent: 20
 vmspace: 0x80684828
   (map 0x80684828)
   (map.pmap 0x806848ac)
   (pmap 0x806848dc)
 threads: 1
100047                   Run     CPU 0               login
db> bt
Tracing pid 153 tid 100047 td 0x80940000
[kernel]        kdb_enter+0x4c (?,?,?,?) ra 801e8644 sp c37dfba8 sz 32 subr 801e8540
[kernel]        kdb_enter+0x120 (?,?,?,?) ra 801aa7f4 sp c37dfbc8 sz 48 subr 801e85a4
[kernel]        syscall_helper_unregister+0x778 (?,?,?,?) ra 801ad1e8 sp c37dfbf8 sz 56 subr 801aa748
[kernel]        sysctl_find_oid+0x534 (?,?,?,?) ra 801ad5b8 sp c37dfc30 sz 88 subr 801ad0c0
[kernel]        userland_sysctl+0xfc (80940000,?,?,?) ra 801ad768 sp c37dfc88 sz 104 subr 801ad4bc
[kernel]        sys___sysctl+0xa0 (?,?,?,?) ra 803908c0 sp c37dfcf0 sz 160 subr 801ad6c8
[kernel]        trap+0xf54 (?,?,?,?) ra 8037e564 sp c37dfd90 sz 240 subr 8038f96c
[kernel]        MipsUserGenException+0x10c (?,?,?,?) ra 00000000 sp c37dfe80 sz 0 subr 8037e458
--- exception, cause 0 badvaddr 7fffebe0 ---
[/lib/libc.so.7]        (0 404aa000 40650000) 0x190be4  0x4063abe4 (?,?,?,?) ra 40639ff4 sp 7fffeb30 sz 0 subr 4063abd8
[/lib/libc.so.7]        (0 404aa000 40650000) 0x18fff4  0x40639ff4 (?,?,?,?) ra 4063759c sp 7fffeb30 sz 64 subr 40639f8c
[/lib/libc.so.7]        (0 404aa000 40650000) 0x18d59c  0x4063759c (?,?,?,?) ra 00401aec sp 7fffeb70 sz 160 subr 4063752c
[/usr/bin/login]        (0 400000 405000) 0x1aec        0x401aec (?,?,?,?) ra 00401bf8 sp 7fffec10 sz 80 subr 401a54
[/usr/bin/login]        (0 400000 405000) 0x1bf8        0x401bf8 (?,?,?,?) ra 00402720 sp 7fffec60 sz 32 subr 401bd8
[/usr/bin/login]        (0 400000 405000) 0x2720        0x402720 (1,7fffeea4,?,?) ra 004014b0 sp 7fffec80 sz 464 subr 401f20
[/usr/bin/login]        (0 400000 405000) 0x14b0        0x4014b0 (?,?,?,?) ra 004013d0 sp 7fffee50 sz 56 subr 4013dc
[/usr/bin/login]        (0 400000 405000) 0x13d0        0x4013d0 (?,?,?,?) ra 7fffef9e sp 7fffee88 sz 40 subr 40134c
can't lookup vnode for 0x8067e498
0x7fffef9e (?,?,?,?) ra 00000000 sp 7fffeeb0 sz 0 subr 0
db>