linux-kernel - [Bugme-new] [Bug 8957] New: Exported functions and variables

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Message-ID: <910709.35108.qm@web52002.mail.re2.yahoo.com>
Date:	Thu, 30 Aug 2007 09:41:41 -0700 (PDT)
From:	Matti Linnanvuori <mattilinnanvuori@...oo.com>
To:	linux-kernel@...r.kernel.org
Cc:	bugme-daemon@...nel-bugs.osdl.org
Subject: [Bugme-new] [Bug 8957] New: Exported functions and variables

I thought that the bug might happen when two kernel modules are being loaded. If module A is loaded and its code includes references to functions exported by module B, I thought module A could call those functions before the module_init function of module B has finished. I was not thinking about buggy calls to registering interface functions. I just thought that the kernel should not allow symbols exported by   EXPORT_SYMBOLto be visible to other modules before the module_init function is finished. One could code the exported functions so that they could be safely called by anyone while the module_init function is being called but that would be an unnecessary burden for coders. I think that a module should expose its functions and variables only by calling registering interface  functions before the module_init function is finished. So I think the design of the kernel modules is flawed if it allows anyone to call exported functions before the module_init
 function is finished.

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