The generic entry check audit context first and use syscall_get_arguments() helper.
In order to switch to the generic entry for arm64, - Also use syscall_get_arguments() to get audit_syscall_entry()'s last four parameters. - Extract the syscall_enter_audit() helper to make it clear. - Check audit context first, which saves an unnecessary memcpy when current process's audit_context is NULL. Overall these changes make syscall_enter_audit() exactly equivalent to the generic one. No functional changes. Reviewed-by: Kevin Brodsky <[email protected]> Signed-off-by: Jinjie Ruan <[email protected]> --- arch/arm64/kernel/ptrace.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index c6dee8a355e5..36e7ba3f38a5 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -2381,6 +2381,16 @@ static void report_syscall_exit(struct pt_regs *regs) } } +static inline void syscall_enter_audit(struct pt_regs *regs, long syscall) +{ + if (unlikely(audit_context())) { + unsigned long args[6]; + + syscall_get_arguments(current, regs, args); + audit_syscall_entry(syscall, args[0], args[1], args[2], args[3]); + } +} + int syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long flags) { int ret; @@ -2411,8 +2421,7 @@ int syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long flags) syscall = syscall_get_nr(current, regs); } - audit_syscall_entry(syscall, regs->orig_x0, regs->regs[1], - regs->regs[2], regs->regs[3]); + syscall_enter_audit(regs, syscall); return ret ? : syscall; } -- 2.34.1
