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Date: Sun, 27 Jul 2014 14:14:20 +0530 From: zubraz singha <zubrajsingha@...il.com> To: Richard Weinberger <richard.weinberger@...il.com> Cc: LKML <linux-kernel@...r.kernel.org> Subject: Re: "copy_to_user" function not working in stable build "2.6.36.4" I do understand that this is a very old build and its not being supported. As I wrote in my earlier mail, the function works fine with higher kernel versions. I will try to find out a work around for this. Appreciate your feedback. Zubraj On 7/27/14, Richard Weinberger <richard.weinberger@...il.com> wrote: > On Sun, Jul 27, 2014 at 10:22 AM, zubraz singha <zubrajsingha@...il.com> > wrote: >> Hey Guys, >> While writing a read proc entry for Linux kernel (version 2.6.36.4), I >> found that the kernel function "copy_to_user" is not working properly. >> The kernel function used internally by "copy_to_user" i.e. >> "__copy_to_user" works fine and also this same function "copy_to_user" >> works quite well on the higher kernel versions, I tried it on Linux >> kernel version 3.14. The kernel source code for "2.6.36.4" doesn't >> have a definition for a function i.e "_copy_to_user", which is being >> called internally by "copy_to_user". However the function >> "_copy_to_user" has a definition in higher version kernels like 3.14 >> etc. I cannot update my kernel, Is there any way I can fix this issue >> by manually patching the kernel. There are two possible ways in which >> I think it can be solved. >> >> - Write a definition for the _copy_to_user in "2.6.36.4", which will >> have the same "access_ok" check and corresponding "__copy_to_user" >> function call. >> - Modifying the function "copy_to_user" and adding the "access_ok" >> check and the "__copy_to_user" function. > > 2.6.36.x is not a supported release. The issue is maybe fixed in other > versions but as > your release is not a stable kernel you are on your own. Sorry. > > -- > Thanks, > //richard > -- -- Regards Zubraj Singha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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