On 09/24/2013 08:04 PM, Tejun Heo wrote: > On Tue, Sep 24, 2013 at 12:27:36PM +0800, Chen Gang wrote: >> For real world, /sbin/init will call setgroups, so user space 'help' >> kernel itself to protect this issue, but I think, we don't only depend >> on the user space help checking. >> >> The proof is below: >> >> [root@gchenlinux tmp]# grep setgroups /sbin/* >> Binary file /sbin/init matches >> Binary file /sbin/rpc.statd matches >> Binary file /sbin/rsyslogd matches >> Binary file /sbin/runuser matches >> >> From reading kernel source code, kernel itself does not intend to set >> 'group_info', it is triggered by user space or another kernel mode >> sub-systems. > > Can you please demonstrate such failure? You can tell kernel to > execute a given binary instead of init with "init=" param. >
OK, I will/should try, today (although I have to spend my additional time resource on it. :-( ). Hmm... in fact, in my opinion, interface (especially content system call) need make itself consistency, although at present, it can not cause issue. > Thanks. > Thanks. -- Chen Gang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
