[DragonFlyBSD - Bug #2615] panic while running gdb test suite

[Nicolas Thery via Redmine]

Issue #2615 has been updated by nthery.


Hello,

Should be fixed on master (763ff625ac).

Cheers,
Nicolas

On 18 December 2013 09:08, Nicolas Thery via Redmine
<bugtracker-admin at leaf.dragonflybsd.org> wrote:
> Issue #2615 has been updated by nthery.
>
>
> Hello,
>
> It tries to ptrace(PT_ATTACH) to process 0 (the swapper) and crashes
> during the reparenting because process 0 has no parent.  There is
> definitely a bug in the kernel which should return an error.  This is
> maybe also symptomatic of a bug in gdb which shouldn't try to debug
> process 0 (or is it a negative test checking how gdb reacts when
> failing to attach to a process?)
>
> I'm tempted to make ptrace(PT_ATTACH) return EINVAL for all system
> processes to prevent this as a reckon ptrace(2) is intended to debug
> userlang only and attaching to kernel processes, besides security
> issues, is deadlock-prone.  I'm checking the literature and other
> implementations to confirm this is the way to go.
>
> Cheers,
> Nicolas
>
> On 17 December 2013 23:25,  <bugtracker-admin at leaf.dragonflybsd.org> wrote:
>>
>> Issue #2615 has been reported by phma.
>>
>> ----------------------------------------
>> Bug #2615: panic while running gdb test suite
>> http://bugs.dragonflybsd.org/issues/2615
>>
>> * Author: phma
>> * Status: New
>> * Priority: High
>> * Assignee:
>> * Category:
>> * Target version:
>> ----------------------------------------
>> see https://github.com/DragonFlyBSD/DPorts/wiki/Run-GDB-testsuite
>>
>> I ran the testsuite on gdb 7.6.1 and it crashed partway through. This is as far as it got:
>>
>> Running ./gdb.base/fileio.exp ...
>> FAIL: gdb.base/fileio.exp: Open for write but no write permission returns
>> EACCES
>> FAIL: gdb.base/fileio.exp: Unlinking a file in a directory w/o write access
>> returns EACCES
>> Running ./gdb.base/gcore-relro.exp ...
>> Running ./gdb.base/huge.exp ...
>> Running ./gdb.base/find.exp ...
>> Running ./gdb.base/ctxobj.exp ...
>> Running ./gdb.base/cond-eval-mode.exp ...
>> Running ./gdb.base/arrayidx.exp ...
>> Running ./gdb.base/eval-skip.exp ...
>> Running ./gdb.base/attach.exp ...
>>
>> It crashed in the same place both times. The kernel dumps are numbers 2 and 3 in leaf:/home/phma/crash/zyxomma/. I need this fixed so that I can fix the thread bug in gdb.
>>
>>
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>
> ----------------------------------------
> Bug #2615: panic while running gdb test suite
> http://bugs.dragonflybsd.org/issues/2615#change-11680
>
> * Author: phma
> * Status: New
> * Priority: High
> * Assignee:
> * Category:
> * Target version:
> ----------------------------------------
> see https://github.com/DragonFlyBSD/DPorts/wiki/Run-GDB-testsuite
>
> I ran the testsuite on gdb 7.6.1 and it crashed partway through. This is as far as it got:
>
> Running ./gdb.base/fileio.exp ...
> FAIL: gdb.base/fileio.exp: Open for write but no write permission returns
> EACCES
> FAIL: gdb.base/fileio.exp: Unlinking a file in a directory w/o write access
> returns EACCES
> Running ./gdb.base/gcore-relro.exp ...
> Running ./gdb.base/huge.exp ...
> Running ./gdb.base/find.exp ...
> Running ./gdb.base/ctxobj.exp ...
> Running ./gdb.base/cond-eval-mode.exp ...
> Running ./gdb.base/arrayidx.exp ...
> Running ./gdb.base/eval-skip.exp ...
> Running ./gdb.base/attach.exp ...
>
> It crashed in the same place both times. The kernel dumps are numbers 2 and 3 in leaf:/home/phma/crash/zyxomma/. I need this fixed so that I can fix the thread bug in gdb.
>
>
>
> --
> You have received this notification because you have either subscribed to it, or are involved in it.
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----------------------------------------
Bug #2615: panic while running gdb test suite
http://bugs.dragonflybsd.org/issues/2615#change-11681

* Author: phma
* Status: New
* Priority: High
* Assignee: 
* Category: 
* Target version: 
----------------------------------------
see https://github.com/DragonFlyBSD/DPorts/wiki/Run-GDB-testsuite

I ran the testsuite on gdb 7.6.1 and it crashed partway through. This is as far as it got:

Running ./gdb.base/fileio.exp ...
FAIL: gdb.base/fileio.exp: Open for write but no write permission returns 
EACCES
FAIL: gdb.base/fileio.exp: Unlinking a file in a directory w/o write access 
returns EACCES
Running ./gdb.base/gcore-relro.exp ...
Running ./gdb.base/huge.exp ...
Running ./gdb.base/find.exp ...
Running ./gdb.base/ctxobj.exp ...
Running ./gdb.base/cond-eval-mode.exp ...
Running ./gdb.base/arrayidx.exp ...
Running ./gdb.base/eval-skip.exp ...
Running ./gdb.base/attach.exp ...

It crashed in the same place both times. The kernel dumps are numbers 2 and 3 in leaf:/home/phma/crash/zyxomma/. I need this fixed so that I can fix the thread bug in gdb.



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