linux-kernel - Re: [PATCH] seccomp, s390: fix build for syscall type change

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Date:   Thu, 13 Dec 2018 16:50:06 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Tycho Andersen <tycho@...ho.ws>
Cc:     Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        prudo@...ux.vnet.ibm.com, linux-s390 <linux-s390@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] seccomp, s390: fix build for syscall type change

On Thu, Dec 13, 2018 at 12:10 PM Tycho Andersen <tycho@...ho.ws> wrote:
>
> A recent patch landed in the security tree [1] that changed the type of the
> seccomp syscall. Unfortunately, I didn't quite get every instance of the
> forward declarations, and thus there is a build failure. Here's the last
> one that I could find, for s390. It should go through the security tree,
> although hopefully some s390 people can check and make sure it looks
> reasonable?
>
> The only oddity is the trailing semicolon; some lines around this patch
> have it, and some lines don't. I've left this one as-is.
>
> [1]: https://lore.kernel.org/lkml/20181212231630.GA31584@beast/T/#u
>
> Signed-off-by: Tycho Andersen <tycho@...ho.ws>

Thanks! Added to my -next tree.

-Kees

> ---
>  arch/s390/kernel/compat_wrapper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c
> index 2ce28bf0c5ec..48c4ce668244 100644
> --- a/arch/s390/kernel/compat_wrapper.c
> +++ b/arch/s390/kernel/compat_wrapper.c
> @@ -164,7 +164,7 @@ COMPAT_SYSCALL_WRAP3(finit_module, int, fd, const char __user *, uargs, int, fla
>  COMPAT_SYSCALL_WRAP3(sched_setattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, flags);
>  COMPAT_SYSCALL_WRAP4(sched_getattr, pid_t, pid, struct sched_attr __user *, attr, unsigned int, size, unsigned int, flags);
>  COMPAT_SYSCALL_WRAP5(renameat2, int, olddfd, const char __user *, oldname, int, newdfd, const char __user *, newname, unsigned int, flags);
> -COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, const char __user *, uargs)
> +COMPAT_SYSCALL_WRAP3(seccomp, unsigned int, op, unsigned int, flags, void __user *, uargs)
>  COMPAT_SYSCALL_WRAP3(getrandom, char __user *, buf, size_t, count, unsigned int, flags)
>  COMPAT_SYSCALL_WRAP2(memfd_create, const char __user *, uname, unsigned int, flags)
>  COMPAT_SYSCALL_WRAP3(bpf, int, cmd, union bpf_attr *, attr, unsigned int, size);
> --
> 2.19.1
>


-- 
Kees Cook