Re: [PATCH 5.10] module: treat exit sections the same as init sections when !CONFIG_MODULE_UNLOAD

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On Mon, May 23, 2022 at 06:39:48AM +0200, Joerg Vehlow wrote:
> Hi,
> 
> this mainline patch 33121347fb1c359bd6e3e680b9f2c6ced5734a8 should be
> applied to 5.15 as well.

You mean 5.10, right?  It's already in 5.13 and newer releases

> Without loading of some modules fails, if
>  1. MODULE_UNLOAD=n
>  2. Architecture is aarch64 (maybe others as well)
>  3. KASLR is active
> 
> Without this patch the symbol .exit.text is not relocated and when the
> linker generated a relative 32 bit relocation(PREL32) and the module is
> loaded far enough away from the default loading address, it will trigger
> a relocation overflow like this:
> 
> module algif_hash: overflow in relocation type 261 val ffff800010051c20
> 
> This happens to all modules, that use BUG in the exit section or if the
> compiler generates a jump table in the exit section.

Now queued up for 5.10.y, thanks.

greg k-h



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