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cygcheck -svc segfaults on Windows 8.1 with cygwin64
- From: Gabriel Marcano <gabemarcano at yahoo dot com>
- To: "cygwin at cygwin dot com" <cygwin at cygwin dot com>
- Date: Mon, 18 Nov 2013 21:35:03 -0800 (PST)
- Subject: cygcheck -svc segfaults on Windows 8.1 with cygwin64
- Authentication-results: sourceware.org; auth=none
- Reply-to: Gabriel Marcano <gabemarcano at yahoo dot com>
cygcheck -svc causes a segfault on Windows 8.1 on line 1610 of cygcheck.cc, based on gdb output. I'm including some gdb output below that showcases this issue:
1610 strcat (osname, products[prod]);
(gdb) list
1605 if (prod == PRODUCT_UNLICENSED)
1606 strcat (osname, "Unlicensed");
1607 else if (prod > PRODUCT_PROFESSIONAL_WMC)
1608 strcat (osname, "");
1609 else
1610 strcat (osname, products[prod]);
1611 }
1612 else
1613 {
1614 }
(gdb) p prod
$1 = 101
(gdb) p sizeof(products)/sizeof(void*)
$2 = 101
'products[prod]' in this case is accessing memory outside of the 'products' array. The odd thing is that a few lines back, the declaration of products includes 104 elements. I do not know why this discrepancy exists-- anyone have a clue?
So far I've tried installing the experimental release of the cygwin base tools (where I think cygcheck is found), some older version of the base tools, and even just by copying cygcheck from the latest snapshot and replacing the one I had in my /cygwin64/bin folder. None of these alternative versions alleviated the issue (and since the snapshot is stripped of debugging symbols and the symbols I have do not match it, I couldn't debug it, other than the fact it crashed with a segfault with the same output as the other cases).
I have been trying to compile cygwin on my computer, but I have not had much success yet. I will continue to try in the mean time. Thanks in advance for any help!
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