Re: Bug#970460: qemu-user: trashes argv[0] breaking multi-call binaries

Thorsten Glaser wrote, quoting Aurelien Jarno in 
https://bugs.debian.org/916276

> The patch is basically replacing the getdents64 syscall by the getdents 
> one. This means that applying this patch would make debian differ with 
> regards to other distributions in the syscalls that are used for the 
> same binaries. In turns it is likely going to affect binaries that are 
> using seccomp and only allow the getdents64 and not the getdents one.

So upgrading glibc (changing a getdents syscall to a getdents64 syscall) 
is fine but doing the reverse would "affect binaries that are using 
seccomp"? Sounds like security theater to me. Do the affected binaries and 
syscall filters actually exist?