From: Dmitry V. Levin <ldv@altlinux.org>
Date: Thu, 12 May 2016 15:03:58 +0000 (+0000)
Subject: ptrace: do not print arguments of PTRACE_TRACEME request
X-Git-Tag: v4.12~182
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=89ca4aa1403daf93284325596e2e4a8fc3bc07ff;p=strace

ptrace: do not print arguments of PTRACE_TRACEME request

As kernel ignores arguments of PTRACE_TRACEME request,
we do not print them either.

* process.c (SYS_FUNC(ptrace)): If request is PTRACE_TRACEME,
return early with RVAL_DECODED.
---

diff --git a/process.c b/process.c
index b2dfac19..f53c12e0 100644
--- a/process.c
+++ b/process.c
@@ -91,6 +91,11 @@ SYS_FUNC(ptrace)
 		/* request */
 		printxval64(ptrace_cmds, request, "PTRACE_???");
 
+		if (request == PTRACE_TRACEME) {
+			/* pid, addr, and data are ignored. */
+			return RVAL_DECODED;
+		}
+
 		/* pid */
 		tprintf(", %d, ", pid);