Re: [PATCH v10 0/6] arm64: add seccomp support

On Fri, Nov 28, 2014 at 05:26:33AM +0000, AKASHI Takahiro wrote:

This patch series enables secure computing (system call filtering) on arm64, and contains related enhancements and bug fixes.

NOTE: This versions contain a workaround against possible BUG_ON() failure at audit_syscall_exit(), but doesn't contain an extra optimization, as I submitted for arm, of excluding syscall enter/exit tracing against invalid system calls due to an issue that I reported in: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/292170.ht...

The code was tested on ARMv8 fast model with 64-bit/32-bit userspace using:

• libseccomp v2.1.1 with modifications for arm64, especially its "live" tests: No.20, 21 and 24.
• modified version of Kees' seccomp test for 'changing/skipping a syscall' and seccomp() system call
• in-house tests for 'changing/skipping a system call' by tracing with ptrace(SETREGSET, NT_SYSTEM_CALL) (that is, not via seccomp filter)'

with and without audit tracing.

Changes v9 -> v10:

• modified system_call_get() for big-endian build [1/6]
• modified the way to check for syscall(-1) on syscall entry [2/6]

Applied, thanks.

Will