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Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.0.0-5
- From: Denis Excoffier <cygwin at Denis-Excoffier dot org>
- To: cygwin at cygwin dot com
- Date: Thu, 16 Apr 2015 21:49:45 +0200
- Subject: Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.0.0-5
- Authentication-results: sourceware.org; auth=none
- References: <announce dot 20150415160254 dot GF7343 at calimero dot vinschen dot de> <CAK-n8j6MpTscHoOCmzkrrTHAxtzL4XuV5TY-x5f-S6mJ8WQk5A at mail dot gmail dot com> <20150416162146 dot GD3657 at calimero dot vinschen dot de> <20150416164346 dot GG3657 at calimero dot vinschen dot de>
On 2015-04-16 Ã 18:43, Corinna Vinschen wrote:
> On Apr 16 18:21, Corinna Vinschen wrote:
>> On Apr 16 08:17, Jim Reisert AD1C wrote:
>>> I am unable to start Cywin/X X-server 1.17.1 with this version.
>>> Previous releases of 2.0.0.x were OK. I had to revert to 1.7.35-1 for
>>> the time being.
>>>
>>> Other than updating to 2.0.0.5, I also installed the April 2015 "Patch
>>> Tuesday" updates from Microsoft. I don't know if the two are related.
>>> Windows 7 Home Premium, 64-bit
>>>
>>> Exception: STATUS_ACCESS_VIOLATION at eip=77C50F8A
>>> eax=00000000 ebx=612D67B0 ecx=00001000 edx=612D2648 esi=00000000 edi=0028C790
>>> ebp=0028C608 esp=0028C604 program=C:\Cygwin\bin\XWin.exe, pid 1660, thread main
>>> cs=0023 ds=002B es=002B fs=0053 gs=002B ss=002B
>>> Stack trace:
>>> Frame Function Args
>>> 0028C608 77C50F8A (00000000, 612D2648, 00000000, 612D67B0)
>>> 0028C738 610CDA1F (000043FF, 00000000, 00000000, 80012428)
>
> On second thought, if I can trust the args output, that would be an
> fchmod(0,0). If there's no uid or gid 0, which there isn't unless you
> explicitely created them in the passwd/group files, the uid and gid have
> no SID connected to. This may be the culprit here.
>
>> I could add an extra check which refuses to change permissions if
>> the account's SID can't be found, but since this occurs very deep
>> in the call stack, the error message might be pretty vapid.
>>
>> Alternatively I just let this slip through and you might wonder
>> why the group hasn't changed in this case.
>
> I added a change to this effect, but it occuurs to me that this may
> be really just a missing test if the uid and gid values are backed by
> a real Windows account. It seems better to return EPERM here.
>
I applied the patch indicated (see in
https://cygwin.com/ml/cygwin-cvs/2015-q2/msg00033.html) and X11 now works
back again.
Thank you 1000 times.
Regards,
Denis Excoffier.
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