Pointer handling error while unmounting volume

[glessard]

$ sudo zfs unmount stuff/Backups/epsilon3
Running process: '/usr/sbin/diskutil' 'unmount' '/Volumes/Stuff/Backups/epsilon3'
Unmount successful for /Volumes/Stuff/Backups/epsilon3
zfs(3456) malloc: *** error for object 0x7f8629407900: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
$

zfs was built at 691a603 on OSX 12F45.
Here's the crashlog:

Process: zfs [3456]
Path: /usr/local/zfs/sbin/zfs
Identifier: zfs
Version: 0
Code Type: X86-64 (Native)
Parent Process: sudo [3455]
User ID: 0

Date/Time: 2014-04-08 18:08:38.247 -0600
OS Version: Mac OS X 10.8.5 (12F45)
Report Version: 10

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Application Specific Information:
*** error for object 0x7f8629407900: pointer being freed was not allocated

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff8f91ad46 __kill + 10
1 libsystem_c.dylib 0x00007fff89560f83 abort + 177
2 libsystem_c.dylib 0x00007fff89534989 free + 392
3 libzfs.2.dylib 0x00000001076715bd zfs_close + 109 (libzfs_dataset.c:607)
4 libzfs.2.dylib 0x000000010766e803 changelist_free + 83 (libzfs_changelist.c:391)
5 libzfs.2.dylib 0x0000000107685f0a zfs_unmountall + 90 (libzfs_mount.c:750)
6 zfs 0x000000010743e1a2 unshare_unmount + 3458 (zfs_main.c:6346)
7 zfs 0x00000001074381a2 zfs_do_unmount + 34 (zfs_main.c:6367)
8 zfs 0x000000010743332f main + 623 (zfs_main.c:6543)
9 libdyld.dylib 0x00007fff8646e7e1 start + 1

Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000000 rbx: 0x00007fff587ce110 rcx: 0x00007fff587ce0f8 rdx: 0x0000000000000000
rdi: 0x0000000000000d80 rsi: 0x0000000000000006 rbp: 0x00007fff587ce120 rsp: 0x00007fff587ce0f8
r8: 0x0000000000000000 r9: 0x0000000000000000 r10: 0x00007fff8f91c342 r11: 0x0000000000000202
r12: 0x0000000107453000 r13: 0x0000000107455000 r14: 0x00007f8629407900 r15: 0x0000000000000001
rip: 0x00007fff8f91ad46 rfl: 0x0000000000000202 cr2: 0x00007fff73e2dff0
Logical CPU: 0

Binary Images:
0x107431000 - 0x107448fff +zfs (0) /usr/local/sbin/zfs
0x107456000 - 0x10746bfff +libnvpair.1.dylib (0) /usr/local/zfs/lib/libnvpair.1.dylib
0x10747a000 - 0x10749efff +libuutil.1.dylib (0) <59854F0F-C489-3E38-A22C-B0D32DFBA65E> /usr/local/zfs/lib/libuutil.1.dylib
0x1074af000 - 0x1075fcff7 +libzpool.1.dylib (0) <676414BC-D55D-33EC-BBED-C63E93BFB13F> /usr/local/zfs/lib/libzpool.1.dylib
0x10766d000 - 0x1076b6fff +libzfs.2.dylib (0) <3097CCCF-A590-356D-B030-0C9E2051C7CE> /usr/local/zfs/lib/libzfs.2.dylib
0x1076ce000 - 0x1076cfff7 +libzfs_core.1.dylib (0) /usr/local/zfs/lib/libzfs_core.1.dylib
0x7fff67031000 - 0x7fff6706594f dyld (210.2.3) <8958FE97-5830-3928-BC38-23136E7D3783> /usr/lib/dyld
0x7fff82fef000 - 0x7fff82ff1ff7 libunc.dylib (25) <92805328-CD36-34FF-9436-571AB0485072> /usr/lib/system/libunc.dylib
0x7fff83a9f000 - 0x7fff83bb792f libobjc.A.dylib (532.2) <90D31928-F48D-3E37-874F-220A51FD9E37> /usr/lib/libobjc.A.dylib
0x7fff85228000 - 0x7fff85256ff7 libsystem_m.dylib (3022.6) /usr/lib/system/libsystem_m.dylib
0x7fff85338000 - 0x7fff8533eff7 libunwind.dylib (35.1) <21703D36-2DAB-3D8B-8442-EAAB23C060D3> /usr/lib/system/libunwind.dylib
0x7fff855d9000 - 0x7fff855e1ff7 libsystem_dnssd.dylib (379.38.1) /usr/lib/system/libsystem_dnssd.dylib
0x7fff85889000 - 0x7fff85890fff libcopyfile.dylib (89) <876573D0-E907-3566-A108-577EAD1B6182> /usr/lib/system/libcopyfile.dylib
0x7fff858db000 - 0x7fff858dcfff libDiagnosticMessagesClient.dylib (8) <8548E0DC-0D2F-30B6-B045-FE8A038E76D8> /usr/lib/libDiagnosticMessagesClient.dylib
0x7fff8646c000 - 0x7fff8646fff7 libdyld.dylib (210.2.3) /usr/lib/system/libdyld.dylib
0x7fff88ec5000 - 0x7fff88f11ff7 libauto.dylib (185.4) /usr/lib/libauto.dylib
0x7fff88f12000 - 0x7fff88f14fff libquarantine.dylib (52.1) <143B726E-DF47-37A8-90AA-F059CFD1A2E4> /usr/lib/system/libquarantine.dylib
0x7fff8945e000 - 0x7fff8945efff libkeymgr.dylib (25) /usr/lib/system/libkeymgr.dylib
0x7fff89507000 - 0x7fff895d3ff7 libsystem_c.dylib (825.40.1) <543B05AE-CFA5-3EFE-8E58-77225411BA6B> /usr/lib/system/libsystem_c.dylib
0x7fff895ff000 - 0x7fff8960afff libsystem_notify.dylib (98.5) /usr/lib/system/libsystem_notify.dylib
0x7fff8960b000 - 0x7fff89613fff liblaunch.dylib (442.26.2) <2F71CAF8-6524-329E-AC56-C506658B4C0C> /usr/lib/system/liblaunch.dylib
0x7fff8984a000 - 0x7fff8984bff7 libSystem.B.dylib (169.3) /usr/lib/libSystem.B.dylib
0x7fff89c20000 - 0x7fff89c2eff7 libsystem_network.dylib (77.10) <0D99F24E-56FE-380F-B81B-4A4C630EE587> /usr/lib/system/libsystem_network.dylib
0x7fff8b15b000 - 0x7fff8b15cff7 libremovefile.dylib (23.2) <6763BC8E-18B8-3AD9-8FFA-B43713A7264F> /usr/lib/system/libremovefile.dylib
0x7fff8b229000 - 0x7fff8b24bff7 libxpc.dylib (140.43) <70BC645B-6952-3264-930C-C835010CCEF9> /usr/lib/system/libxpc.dylib
0x7fff8b2a8000 - 0x7fff8b2a9fff libsystem_blocks.dylib (59) /usr/lib/system/libsystem_blocks.dylib
0x7fff8b67b000 - 0x7fff8b689fff libcommonCrypto.dylib (60027) /usr/lib/system/libcommonCrypto.dylib
0x7fff8c9ff000 - 0x7fff8ca00ff7 libsystem_sandbox.dylib (220.3) /usr/lib/system/libsystem_sandbox.dylib
0x7fff8d6b3000 - 0x7fff8d702ff7 libcorecrypto.dylib (106.2) /usr/lib/system/libcorecrypto.dylib
0x7fff8e4ea000 - 0x7fff8e4fcff7 libz.1.dylib (43) <2A1551E8-A272-3DE5-B692-955974FE1416> /usr/lib/libz.1.dylib
0x7fff8e4fd000 - 0x7fff8e4feff7 libdnsinfo.dylib (453.19) <14202FFB-C3CA-3FCC-94B0-14611BF8692D> /usr/lib/system/libdnsinfo.dylib
0x7fff8e630000 - 0x7fff8e655ff7 libc++abi.dylib (26) /usr/lib/libc++abi.dylib
0x7fff8e880000 - 0x7fff8e895ff7 libdispatch.dylib (228.23) /usr/lib/system/libdispatch.dylib
0x7fff8eb74000 - 0x7fff8eb7afff libmacho.dylib (829) /usr/lib/system/libmacho.dylib
0x7fff8eb86000 - 0x7fff8eb8bfff libcache.dylib (57) <65187C6E-3FBF-3EB8-A1AA-389445E2984D> /usr/lib/system/libcache.dylib
0x7fff8f147000 - 0x7fff8f17dfff libsystem_info.dylib (406.17) <4FFCA242-7F04-365F-87A6-D4EFB89503C1> /usr/lib/system/libsystem_info.dylib
0x7fff8f909000 - 0x7fff8f924ff7 libsystem_kernel.dylib (2050.48.12) <4B7993C3-F62D-3AC1-AF92-414A0D6EED5E> /usr/lib/system/libsystem_kernel.dylib
0x7fff8f95e000 - 0x7fff8f963fff libcompiler_rt.dylib (30) <08F8731D-5961-39F1-AD00-4590321D24A9> /usr/lib/system/libcompiler_rt.dylib
0x7fff8f964000 - 0x7fff8f9ccff7 libc++.1.dylib (65.1) <20E31B90-19B9-3C2A-A9EB-474E08F9FE05> /usr/lib/libc++.1.dylib

External Modification Summary:
Calls made by other processes targeting this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by this process:
task_for_pid: 0
thread_create: 0
thread_set_state: 0
Calls made by all processes on this machine:
task_for_pid: 69141
thread_create: 1
thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=59.2M resident=20.0M(34%) swapped_out_or_unallocated=39.2M(66%)
Writable regions: Total=17.5M written=388K(2%) resident=452K(3%) swapped_out=0K(0%) unallocated=17.1M(97%)

REGION TYPE VIRTUAL
=========== =======
MALLOC 9396K
MALLOC guard page 16K
STACK GUARD 56.0M
Stack 8192K
VM_ALLOCATE 4K
__DATA 756K
__LINKEDIT 52.7M
__TEXT 6620K
shared memory 12K
=========== =======
TOTAL 133.1M

[lundman]

This could be related to #123 and its fix. Are you running git's master, or from the installer?

[glessard]

This was a source build off the master branch.
I'll rebuild at the current rev and see whether it ever happens again. Thanks!

[glessard]

Probably same as issue #123; will reopen if it reoccurs.