Re: [PATCH v38 20/24] x86/traps: Attempt to fixup exceptions in vDSO before signaling

[Borislav Petkov]

On Tue, Sep 15, 2020 at 02:28:38PM +0300, Jarkko Sakkinen wrote:
> diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
> index 9e5ec861aba0..ebe290a68c36 100644
> --- a/arch/x86/mm/fault.c
> +++ b/arch/x86/mm/fault.c
> @@ -30,6 +30,7 @@
>  #include <asm/cpu_entry_area.h>		/* exception stack		*/
>  #include <asm/pgtable_areas.h>		/* VMALLOC_START, ...		*/
>  #include <asm/kvm_para.h>		/* kvm_handle_async_pf		*/
> +#include <asm/vdso.h>			/* fixup_vdso_exception()	*/
>  
>  #define CREATE_TRACE_POINTS
>  #include <asm/trace/exceptions.h>
> @@ -775,6 +776,10 @@ __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code,
>  
>  		sanitize_error_code(address, &error_code);
>  
> +		if (fixup_vdso_exception(regs, X86_TRAP_PF, error_code,
> +		    address))

No need to break that line.

-- 
Regards/Gruss,
    Boris.

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