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exception error in _scproxy.so when called after fork #58037
Description
| BPO | 13829 |
|---|---|
| Nosy | @ronaldoussoren, @ned-deily, @bitdancer, @evanj, @grimreaper, @willingc, @PythonCoderAS |
| Files |
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields:
assignee = None
closed_at = None
created_at = <Date 2012-01-19.18:42:02.027>
labels = ['OS-mac', '3.7', '3.8', 'type-crash']
title = 'exception error in _scproxy.so when called after fork'
updated_at = <Date 2020-11-09.09:02:42.368>
user = 'https://bugs.python.org/Dankamp'bugs.python.org fields:
activity = <Date 2020-11-09.09:02:42.368>
actor = 'ronaldoussoren'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['macOS']
creation = <Date 2012-01-19.18:42:02.027>
creator = 'Dan.kamp'
dependencies = []
files = ['47503']
hgrepos = []
issue_num = 13829
keywords = []
message_count = 16.0
messages = ['151648', '151705', '151706', '151736', '151773', '151831', '181426', '181427', '182341', '192440', '269109', '269174', '272109', '314543', '355808', '380577']
nosy_count = 10.0
nosy_names = ['ronaldoussoren', 'ned.deily', 'r.david.murray', 'evanj', 'Julian.Scheid', 'Dan.kamp', 'eitan.adler', 'willingc', 'triccare triccare', 'ThePokestarFan']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'resolved'
status = 'pending'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue13829'
versions = ['Python 2.7', 'Python 3.5', 'Python 3.6', 'Python 3.7', 'Python 3.8']
Activity
Dankamp commentedon Jan 19, 2012
Get this error when trying to run Moviegrabber on a mac running v2.7. Crash report below.
Process: Python [2444]
Path: /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/C ontents/MacOS/Python
Identifier: Python
Version: ??? (???)
Code Type: X86-64 (Native)
Parent Process: Python [2431]
Date/Time: 2011-12-21 20:32:41.233 -0500
OS Version: Mac OS X 10.7.2 (11C74)
Report Version: 9
Interval Since Last Report: 357638 sec
Crashes Since Last Report: 17
Per-App Crashes Since Last Report: 405
Anonymous UUID: 3C387DB7-0AA3-4F34-A100-31D1736D2668
Crashed Thread: 0
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000108
VM Regions Near 0x108:
-->
__TEXT 000000010c5c5000-000000010c5c6000 [ 4K] r-x/rwx SM=COW /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/C ontents/MacOS/Python
Application Specific Information:
objc[2429]: garbage collection is OFF
Thread 0 Crashed:
0 libdispatch.dylib 0x00007fff8b14ace9 _dispatch_wakeup + 108
1 libdispatch.dylib 0x00007fff8b14d876 _dispatch_resume_slow + 20
2 com.apple.CoreFoundation 0x00007fff8af8262c -[NSXPCConnection start] + 92
3 com.apple.CoreFoundation 0x00007fff8af84ca3 __CFXNotificationCenterSetupConnection + 387
4 com.apple.CoreFoundation 0x00007fff8af84b11 __CFXNotificationCenterCreate + 273
5 com.apple.CoreFoundation 0x00007fff8af849ea __CFNotificationCenterGetDistributedCenter_block_invoke_1 + 26
6 libdispatch.dylib 0x00007fff8b14d224 dispatch_once_f + 53
7 com.apple.CoreFoundation 0x00007fff8af73e0a CFNotificationCenterGetDistributedCenter + 74
8 com.apple.CoreFoundation 0x00007fff8afb2eb8 ____CFXPreferencesGetSourceForTriplet_block_invoke_1 + 40
9 libdispatch.dylib 0x00007fff8b14d224 dispatch_once_f + 53
10 com.apple.CoreFoundation 0x00007fff8af7fa4a __CFXPreferencesGetSourceForTriplet + 58
11 com.apple.CoreFoundation 0x00007fff8af8be67 __CFXPreferencesGetSearchListForBundleID + 215
12 com.apple.CoreFoundation 0x00007fff8af8bd48 ___CFXPreferencesCopyAppValue_block_invoke_1 + 24
13 com.apple.CoreFoundation 0x00007fff8af8bcea CFPreferencesCopyAppValue + 218
14 com.apple.SystemConfiguration 0x00007fff928f388c SCDynamicStoreCopyProxies + 43
15 _scproxy.so 0x000000010ceae9ba 0x10ceae000 + 2490
16 org.python.python 0x000000010c651b58 PyEval_EvalFrameEx + 13318
17 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
18 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
19 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
20 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
21 org.python.python 0x000000010c654cd8 PyEval_EvalCodeEx + 1996
22 org.python.python 0x000000010c5f2abf 0x10c5ca000 + 166591
23 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
24 org.python.python 0x000000010c5e06e9 0x10c5ca000 + 91881
25 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
26 org.python.python 0x000000010c64dc40 PyEval_CallObjectWithKeywords + 180
27 org.python.python 0x000000010c5dd489 PyInstance_New + 273
28 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
29 org.python.python 0x000000010c651f63 PyEval_EvalFrameEx + 14353
30 org.python.python 0x000000010c654cd8 PyEval_EvalCodeEx + 1996
31 org.python.python 0x000000010c654e6c 0x10c5ca000 + 568940
32 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
33 org.python.python 0x000000010c654cd8 PyEval_EvalCodeEx + 1996
34 org.python.python 0x000000010c654e6c 0x10c5ca000 + 568940
35 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
36 org.python.python 0x000000010c654cd8 PyEval_EvalCodeEx + 1996
37 org.python.python 0x000000010c5f2abf 0x10c5ca000 + 166591
38 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
39 org.python.python 0x000000010c6525ec PyEval_EvalFrameEx + 16026
40 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
41 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
42 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
43 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
44 org.python.python 0x000000010c654cd8 PyEval_EvalCodeEx + 1996
45 org.python.python 0x000000010c5f2abf 0x10c5ca000 + 166591
46 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
47 org.python.python 0x000000010c5e06e9 0x10c5ca000 + 91881
48 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
49 org.python.python 0x000000010c61c484 0x10c5ca000 + 337028
50 org.python.python 0x000000010c616b7a 0x10c5ca000 + 314234
51 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
52 org.python.python 0x000000010c651f63 PyEval_EvalFrameEx + 14353
53 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
54 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
55 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
56 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
57 org.python.python 0x000000010c654cd8 PyEval_EvalCodeEx + 1996
58 org.python.python 0x000000010c5f2abf 0x10c5ca000 + 166591
59 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
60 org.python.python 0x000000010c6525ec PyEval_EvalFrameEx + 16026
61 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
62 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
63 org.python.python 0x000000010c654df7 0x10c5ca000 + 568823
64 org.python.python 0x000000010c651e0a PyEval_EvalFrameEx + 14008
65 org.python.python 0x000000010c654cd8 PyEval_EvalCodeEx + 1996
66 org.python.python 0x000000010c5f2abf 0x10c5ca000 + 166591
67 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
68 org.python.python 0x000000010c5e06e9 0x10c5ca000 + 91881
69 org.python.python 0x000000010c5d1d32 PyObject_Call + 97
70 org.python.python 0x000000010c64dc40 PyEval_CallObjectWithKeywords + 180
71 org.python.python 0x000000010c67f40d 0x10c5ca000 + 742413
72 libsystem_c.dylib 0x00007fff978098bf _pthread_start + 335
73 libsystem_c.dylib 0x00007fff9780cb75 thread_start + 13
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000100 rbx: 0x00007ffc6a6e8610 rcx: 0x00007ffc6a6e8628 rdx: 0x0000000000000001
rdi: 0x00007ffc6a6e8620 rsi: 0x00007fff8c3d6c40 rbp: 0x000000010d471080 rsp: 0x000000010d471070
r8: 0x00007ffc6a6dc398 r9: 0x0000000000000596 r10: 0x0000000000000081 r11: 0x00007fff8af825d0
r12: 0x0000000000000000 r13: 0x0000000000000000 r14: 0x00007fff7ad93180 r15: 0x00007ffc6a6bde28
rip: 0x00007fff8b14ace9 rfl: 0x0000000000010206 cr2: 0x0000000000000108
Logical CPU: 0
Binary Images:
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0x7fff92c8f000 - 0x7fff92c90ff7 libsystem_blocks.dylib (53.0.0 - compatibility 1.0.0) <8BCA214A-8992-34B2-A8B9-B74DEACA1869> /usr/lib/system/libsystem_blocks.dylib
0x7fff92e7c000 - 0x7fff92e82ff7 libunwind.dylib (30.0.0 - compatibility 1.0.0) <1E9C6C8C-CBE8-3F4B-A5B5-E03E3AB53231> /usr/lib/system/libunwind.dylib
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0x7fff93687000 - 0x7fff9368cfff libcompiler_rt.dylib (6.0.0 - compatibility 1.0.0) <98ECD5F6-E85C-32A5-98CD-8911230CB66A> /usr/lib/system/libcompiler_rt.dylib
0x7fff936ce000 - 0x7fff938d0fff libicucore.A.dylib (46.1.0 - compatibility 1.0.0) <38CD6ED3-C8E4-3CCD-89AC-9C3198803101> /usr/lib/libicucore.A.dylib
0x7fff95141000 - 0x7fff95149fff libsystem_dnssd.dylib (??? - ???) <7749128E-D0C5-3832-861C-BC9913F774FA> /usr/lib/system/libsystem_dnssd.dylib
0x7fff95396000 - 0x7fff95397fff libffi.dylib (??? - ???) <DB96CC4B-0D38-3102-80AA-91DDE9AF3886> /usr/lib/libffi.dylib
0x7fff95c12000 - 0x7fff95d1efff libcrypto.0.9.8.dylib (44.0.0 - compatibility 0.9.8) <3A8E1F89-5E26-3C8B-B538-81F5D61DBF8A> /usr/lib/libcrypto.0.9.8.dylib
0x7fff95e42000 - 0x7fff95e43fff libdnsinfo.dylib (395.6.0 - compatibility 1.0.0) <718A135F-6349-354A-85D5-430B128EFD57> /usr/lib/system/libdnsinfo.dylib
0x7fff9653c000 - 0x7fff96543fff libcopyfile.dylib (85.1.0 - compatibility 1.0.0) <172B1985-F24A-34E9-8D8B-A2403C9A0399> /usr/lib/system/libcopyfile.dylib
0x7fff96544000 - 0x7fff96546fff com.apple.TrustEvaluationAgent (2.0 - 1) <1F31CAFF-C1C6-33D3-94E9-11B721761DDF> /System/Library/PrivateFrameworks/TrustEvaluationAgent.framework/Versions/A/Tru stEvaluationAgent
0x7fff96547000 - 0x7fff9654dfff libmacho.dylib (800.0.0 - compatibility 1.0.0) <D86F63EC-D2BD-32E0-8955-08B5EAFAD2CC> /usr/lib/system/libmacho.dylib
0x7fff96845000 - 0x7fff96948fff libsqlite3.dylib (9.6.0 - compatibility 9.0.0) <7F60B0FF-4946-3639-89AB-B540D318B249> /usr/lib/libsqlite3.dylib
0x7fff96949000 - 0x7fff96976fe7 libSystem.B.dylib (159.1.0 - compatibility 1.0.0) <095FDD3C-3961-3865-A59B-A5B0A4B8B923> /usr/lib/libSystem.B.dylib
0x7fff977b9000 - 0x7fff977bafff libDiagnosticMessagesClient.dylib (??? - ???) <3DCF577B-F126-302B-BCE2-4DB9A95B8598> /usr/lib/libDiagnosticMessagesClient.dylib
0x7fff977bb000 - 0x7fff97898fef libsystem_c.dylib (763.12.0 - compatibility 1.0.0) <FF69F06E-0904-3C08-A5EF-536FAFFFDC22> /usr/lib/system/libsystem_c.dylib
0x7fff978b6000 - 0x7fff978c0ff7 liblaunch.dylib (392.18.0 - compatibility 1.0.0) <39EF04F2-7F0C-3435-B785-BF283727FFBD> /usr/lib/system/liblaunch.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: 2200
thread_create: 0
thread_set_state: 0
VM Region Summary:
ReadOnly portion of Libraries: Total=60.9M resident=29.0M(48%) swapped_out_or_unallocated=31.9M(52%)
Writable regions: Total=49.5M written=2296K(5%) resident=19.6M(40%) swapped_out=0K(0%) unallocated=29.9M(60%)
REGION TYPE VIRTUAL
=========== =======
MALLOC 34.4M
MALLOC guard page 48K
SQLite page cache 96K
STACK GUARD 4K
Stack 70.6M
VM_ALLOCATE 8K
__DATA 1780K
__LINKEDIT 48.0M
__TEXT 12.9M
__UNICODE 544K
shared memory 12K
=========== =======
TOTAL 168.4M
Model: Macmini3,1, BootROM MM31.0081.B06, 2 processors, Intel Core 2 Duo, 2 GHz, 4 GB, SMC 1.35f0
Graphics: NVIDIA GeForce 9400, NVIDIA GeForce 9400, PCI, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x90), Broadcom BCM43xx 1.0 (5.10.131.36.11)
Bluetooth: Version 4.0.1f4, 2 service, 18 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: Hitachi HTS543212L9SA02, 120.03 GB
Serial ATA Device: PIONEER DVD-RW DVRTS08
USB Device: Mac OS X Install Disk, apple_vendor_id, 0x1502, 0x26200000 / 2
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8216, 0x06110000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 2
FireWire Device: Rev2, Drobo, 400mbit_speed
brettcannon commentedon Jan 20, 2012
Can you isolate the cause? There is way too much in that core dump to try to debug the problem. Without knowing what code in this Moviegrabber app caused the bug we can't do anything to debug the issue.
Dankamp commentedon Jan 20, 2012
On Jan 20, 2012, at 4:20 PM, Brett Cannon wrote:
All I know is that this happens with Moviegrabber and no other app that I am running (5 of them). Attached is the code I am using. This is WAY above what I know how to do but I can tell you that I am running it on a mac with 2.7.1 installed and OSX lion. Attached is the source. Thanks
brettcannon commentedon Jan 21, 2012
Then I'm going to assume the bug lies with Moviegrabber doing something wrong and it isn't Python's direct fault.
Dankamp commentedon Jan 22, 2012
I have received this from the macpython listserv it that helps. Would really like to find this issue.
From the traceback, it appears that there is a problem with Python's
_scproxy module; that's an internal helper C module that provides an
interface to the OS X System Configuration framework to access Internet
proxy configurations for the urllib module. You should open an issue
for this at bugs.python.org. Please include the original crash report
traceback.
On Jan 21, 2012, at 12:03 PM, Brett Cannon wrote:
ned-deily commentedon Jan 23, 2012
The problem was originally discussed in these threads:
http://mail.python.org/pipermail/pythonmac-sig/2011-December/023428.html
http://mail.python.org/pipermail/pythonmac-sig/2011-December/023430.html
Because _scproxy is used to get information about Internet proxies, a test case should be constructed on OS X 10.7.x with a proxy configured.
[-]exception error[/-][+]exception error in _scproxy.so[/+]ronaldoussoren commentedon Feb 5, 2013
I've once again reviewed the _scproxy code and that code seems correct (although that doesn't say too much for subtle bugs because I wrote the initial version of the module).
Dan: is it possible to tell moviegrabber to use another python installation (in particular /Library/Frameworks/Python.framework)? If so, is the problem reproducable with the latest binaries on www.python.org?
The crash report says that the actual crash occurs inside a function called by SCDynamicStoreCopyProxies and I wouldn't know how Python's use of that function is wrong.
The crash could still be caused by the way the moviegrabber application uses python, but I'd consider that a bug in moviegrabber unless there is a clear indication of a bug in python itself.
BTW. Is Moviegrabber this software? : http://sourceforge.net/projects/moviegrabber/
17 remaining items
warsaw commentedon Apr 14, 2022
I'll bet it's a symptom of fork-without-exec that I wrote about 3 years ago. If so, it is not fixable in Python.
ronaldoussoren commentedon Apr 15, 2022
It is.
Fix macOS SIGSEGV in task execution by using fork+exec
Fix macOS SIGSEGV in task execution by using fork+exec
Fix macOS SIGSEGV in task execution by using fork+exec
Fix macOS SIGSEGV in task execution by using fork+exec
Fix macOS SIGSEGV in task execution by using fork+exec
Fix macOS `SIGSEGV` in task execution by using `fork`+`exec` (#64874)
Fix macOS `SIGSEGV` in task execution by using `fork`+`exec` (#64874) (…
Fix macOS `SIGSEGV` in task execution by using `fork`+`exec` (#64874) (…
Fix macOS `SIGSEGV` in task execution by using `fork`+`exec` (#64874) (…
Fix macOS `SIGSEGV` in task execution by using `fork`+`exec` (#64874) (…
Fix macOS `SIGSEGV` in task execution by using `fork`+`exec` (#64874)…
Fix macOS `SIGSEGV` in task execution by using `fork`+`exec` (#64874)