Re: [Qemu-devel] [PATCHv2] linux-user: Fix sched_getaffinity mask size

[Laurent Vivier]

Le 11/02/2018 à 18:47, Samuel Thibault a écrit :
> We properly computed the capped mask size to be put to the application
> buffer, but didn't actually used it. Also, we need to return the capped mask
> size instead of 0 on success.
> 
> Signed-off-by: Samuel Thibault <address@hidden>
> 
> ---
> Difference from v1:
> - simplify fix
> ---
>  linux-user/syscall.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 82b35a6bdf..bcda3362fc 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -10493,7 +10493,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long 
> arg1,
>                      ret = arg2;
>                  }
>  
> -                ret = host_to_target_cpu_mask(mask, mask_size, arg3, arg2);
> +                if (host_to_target_cpu_mask(mask, mask_size, arg3, ret)) {
> +                    goto efault;
> +                }
>              }
>          }
>          break;
> 

Applied to my 'linux-user-for-2.12' branch.

Thanks,
Laurent