[PATCH] powerpc: Fix writable sections being moved into the rodata region

[Christophe Leroy]

Le 16/11/2022 à 05:39, Nicholas Piggin a écrit :
> .data.rel.ro*  catches .data.rel.root_cpuacct, and the kernel crashes on
> a store in css_clear_dir. At least we know read-only data protection is
> working...
> 
> Fixes: b6adc6d6d3272 ("powerpc/build: move .data.rel.ro, .sdata2 to read-only")
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Reviewed-by: Christophe Leroy <christophe.leroy at csgroup.eu>

> ---
>   arch/powerpc/kernel/vmlinux.lds.S | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
> index 7786e3ac7611..8c3862b4c259 100644
> --- a/arch/powerpc/kernel/vmlinux.lds.S
> +++ b/arch/powerpc/kernel/vmlinux.lds.S
> @@ -142,7 +142,7 @@ SECTIONS
>   #endif
>   
>   	.data.rel.ro : AT(ADDR(.data.rel.ro) - LOAD_OFFSET) {
> -		*(.data.rel.ro*)
> +		*(.data.rel.ro .data.rel.ro.*)
>   	}
>   
>   	.branch_lt : AT(ADDR(.branch_lt) - LOAD_OFFSET) {