Re: [PATCH] audit: do a quick exit when syscall number is invalid
On Mon, Mar 28, 2022 at 11:06:12PM -0400, Paul Moore wrote:
On Mon, Mar 28, 2022 at 9:48 PM CGEL <cgel.zte(a)gmail.com>
wrote:
> Sorry could anybody give a hand to solve this? It works well on x86_64 and arm64.
> I have no alpha environment and not familiar to this arch, much thanks!
Regardless of if this is fixed, I'm not convinced this is something we
want to merge. After all, a process executed a syscall and we should
process it like any other; just because it happens to be an
unrecognized syscall on a particular kernel build doesn't mean it
isn't security relevant (probing for specific syscall numbers may be a
useful attack fingerprint).
Thanks for your reply.
But syscall number less than 0 is even invalid for auditctl. So we
will never hit this kind of audit rule. And invalid syscall number
will always cause failure early in syscall handle.
sh-4.2# auditctl -a always,exit -F arch=b64 -S -1
Syscall name unknown: -1