[Mono-bugs] [Bug 49499][Cri] Changed - mono:: segfaults under Fedora Linux

bugzilla-daemon@bugzilla.ximian.com bugzilla-daemon@bugzilla.ximian.com
Fri, 17 Oct 2003 20:26:16 -0400 (EDT)

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Changed by tds00mahi@thn.htu.se.


--- shadow/49499	2003-10-17 16:12:44.000000000 -0400
+++ shadow/49499.tmp.8718	2003-10-17 20:26:16.000000000 -0400
@@ -209,6 +209,17 @@
 [torkar@~]$ mcs
 error CS2008: No files to compile were specified
 Compilation failed: 1 error(s), 0 warnings
 That's it... But if it's enabled as default in upcoming releases we
 will have a lot of people complaining about mcs giving a segfault...
+------- Additional Comments From tds00mahi@thn.htu.se  2003-10-17 20:26 -------
+Concurring with what was already suggested - that this is because of
+the Exec-Shield implementation in Fedora (
+http://lists.insecure.org/lists/linux-kernel/2003/May/0371.html ), I
+am attaching a patch suggestion below with what I believe could be one
+solution. The call to mmap() will not set execution rights even if
+passed as argument (Exec-Shield prevents implicit executable rights
+commonly assumed from the (at least on x86) merged 'read or execute'
+flag (details in link above)), so by adding a call to mprotect() we
+can set PROT_EXEC to allow execution rights on the mapped area.