malloc fail output

vmm: protecting kernel code and rodata
     0xffffffff80106100 - 0xffffffff80119000
terminal: initialized
uart: initialized
rand: initialized 'random' generator
idt: interrupts installed
pic: remapped and masked
pit: running tickless
uart: listening for interrupts
kbrd: listening for interrupts
mb: parsing multiboot at 0xffffffff801e0000
mb: unknown tag type 21 encountered
mb: kernel command line: init=init
mb: bootloader name: GRUB 2.02+dfsg1-5ubuntu8.2
mb: unknown tag type 10 encountered
mb: initfs at 0xffffffff80145000
mb: unknown tag type 4 encountered
mb: unknown tag type 5 encountered
mb: unknown tag type 8 encountered
mmap:                0:     9fc00 type 1
mmap:            9fc00:       400 type 2
mmap:            f0000:     10000 type 2
mmap:           100000:   fee0000 type 1
mmap:          ffe0000:     20000 type 2
mmap:         fffc0000:     40000 type 2
mmap: total usable memory: 267910144 (255MB + 511KB)
mb: user init at 0xffffffff80145000
initfs at 0xffffffff80145000
pmm: using 0x1e1000 as the first physical page
malloc(256)
malloc(376)
malloc(376)
malloc(128)
vfs: filesystem initiated
network: network initialized
malloc(256)
malloc(256)
threads: thread data at 0xffffff00000006f0
threads: process structures initialized
pci: found Host bridge (8086:1237) at 00:00.0
pci: found ISA bridge (8086:7000) at 00:01.0
pci: found IDE interface (8086:7010) at 00:01.1
pci: found Bridge (8086:7113) at 00:01.3
pci: found VGA controller (1234:1111) at 00:02.0
pci: found Ethernet controller (10ec:8139) at 00:03.0

********************************

The Nightingale Operating System
Version v0.3.13-6-g486b86f

********************************

cpu: allowing irqs
malloc(56)
malloc(16)
q->tail = (NULL)
enqueue 0xffffff0000000a80
init (35424b)
sh (37688b)
echo (35376b)
test (35680b)
uname (35504b)
what (35248b)
bf (38928b)
strace (35392b)
bomb (35168b)
rsh (36280b)
net (36296b)
busy (36416b)
cat (35816b)
udpnc (39152b)
polltest (35744b)
malloctest (35440b)
threads (35704b)
text_file (20b)
done.
Starting ring 3 thread at 0x401968

malloc(104)
malloc(56)
malloc(128)
malloc(16)
qo = 0xffffff0000000a80
q->tail = 0xffffff0000000a80
enqueue 0xffffff0000000f40
Hello World from a kernel thread
Hello World from ring 3!
Nightingale shell
$ malloc(16)
qo = 0x0000f031b80000a4

region, next, previous, length, status, valid
0xffffff0000000000, 0xffffff0000000130, (NULL), 256, used, valid
0xffffff0000000130, 0xffffff0000000360, 0xffffff0000000000, 512, used, valid
0xffffff0000000360, 0xffffff0000000590, 0xffffff0000000130, 512, used, valid
0xffffff0000000590, 0xffffff00000006c0, 0xffffff0000000360, 256, used, valid
0xffffff00000006c0, 0xffffff00000007f0, 0xffffff0000000590, 256, used, valid
0xffffff00000007f0, 0xffffff0000000920, 0xffffff00000006c0, 256, used, valid
0xffffff0000000920, 0xffffff0000000a50, 0xffffff00000007f0, 256, used, valid
0xffffff0000000a50, 0xffffff0000000b80, 0xffffff0000000920, 256, used, valid
0xffffff0000000b80, 0xffffff0000000cb0, 0xffffff0000000a50, 256, used, valid
0xffffff0000000cb0, 0xffffff0000000de0, 0xffffff0000000b80, 256, used, valid
0xffffff0000000de0, 0xffffff0000000f10, 0xffffff0000000cb0, 256, used, valid
0xffffff0000000f10, 0xffffff0000001040, 0xffffff0000000de0, 256, used, valid
0xffffff0000001040, 0xffffff0000001170, 0xffffff0000000f10, 256, used, valid
0xffffff0000001170, (NULL), 0xffffff0000001040, 16772704, free, valid
**

total len: 16776544
inuse len: 3840
total regions: 14
inuse regions: 13
Unhandled exception at 0xffffffff80108dfb
Fault: #GP (General Protection Fault), error code: 0x00
    rax:     f031b80000a4    r8 : ffffffffffffffff
    rbx:                0    r9 :                0
    rcx: ffffffff80115085    r10: ffffffff80107651
    rdx:              3f8    r11:                0
    rsp: ffffffff85005cc8    r12:                0
    rbp: ffffffff85005ce8    r13:     7ffffefffc58
    rsi:                a    r14:              100
    rdi:              3f8    r15:                0
    rip: ffffffff80108dfb    rfl: [ P Z  I       ] (246)
    cr3:           1f2000    pid:                1
backtrace from ffffffff85005ce8:
    bp: ffffffff85005ce8    ip: ffffffff80108e4f
    bp: ffffffff85005d08    ip: ffffffff8010c1e2
    bp: ffffffff85005d38    ip: ffffffff80107737
    bp: ffffffff85005dc8    ip: ffffffff8010dc84
    bp: ffffffff85005e88    ip: ffffffff8010ef81
    bp: ffffffff85005f08    ip: ffffffff8010edf2
    bp: ffffffff85005f28    ip: ffffffff80107030
end of memory
Stack dump: (sp at 0xffffffff85005cc8)
ffffffff85005c88: 0d00 0000 0000 0000 0000 0000 0000 0000   ................
ffffffff85005c98: fb8d 1080 ffff ffff 0800 0000 0000 0000   ................
ffffffff85005ca8: 4602 0000 0000 0000 c85c 0085 ffff ffff   F........\......
ffffffff85005cb8: 0000 0000 0000 0000 f78d 1080 ffff ffff   ................
ffffffff85005cc8: 7011 0000 00ff ffff f004 0000 00ff ffff   p...............
ffffffff85005cd8: 085d 0085 ffff ffff a400 00b8 31f0 0000   .]..........1...
ffffffff85005ce8: 085d 0085 ffff ffff 4f8e 1080 ffff ffff   .]......O.......
ffffffff85005cf8: 7010 0000 00ff ffff f004 0000 00ff ffff   p...............
ffffffff85005d08: 385d 0085 ffff ffff e2c1 1080 ffff ffff   8]..............
[PANIC]


*****

*print_queue@queue.c:18 (discriminator 3)
queue_enqueue@queue.c:29
block_thread@thread.c:594
sys_read@vfs.c:56
do_syscall_with_table@syscall.c:162
syscall_handler@interrupt.c:231
c_interrupt_shim@interrupt.c:204
return_from_interrupt@??:?