Extract syscall_enter_audit() helper and use syscall_get_arguments() to get syscall arguments, matching the generic entry implementation.
The new code: - Checks audit_context() first to avoid unnecessary memcpy when audit is not active. - Uses syscall_get_arguments() helper instead of directly accessing regs fields. - Is now exactly equivalent to generic entry's syscall_enter_audit(). No functional changes. Cc: Will Deacon <[email protected]> Cc: Catalin Marinas <[email protected]> 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 d68f872339c7..3cb497b2bd22 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -2408,6 +2408,16 @@ 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, unsigned long flags) { long syscall; @@ -2439,8 +2449,7 @@ int syscall_trace_enter(struct pt_regs *regs, 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
