From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 23 Feb 2012 18:08:47 +0000 (-0500)
Subject: fix (hopefully) PTRACE_TRACEME (command 0) argument handling
X-Git-Tag: v0.8.5~7
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=00b883a95561b7ed31b0907fcd7cb16267de6e4d;p=oweals%2Fmusl.git

fix (hopefully) PTRACE_TRACEME (command 0) argument handling
---

diff --git a/src/misc/ptrace.c b/src/misc/ptrace.c
index f8540698..83b8022b 100644
--- a/src/misc/ptrace.c
+++ b/src/misc/ptrace.c
@@ -17,9 +17,9 @@ long ptrace(int req, ...)
 	addr2 = va_arg(ap, void *);
 	va_end(ap);
 
-	if (req<4U) data = &result;
+	if (req-1U < 3) data = &result;
 	ret = syscall(SYS_ptrace, req, pid, addr, data, addr2);
 
-	if (ret<0 || req>=4U) return ret;
+	if (ret < 0 || req-1U >= 3) return ret;
 	return result;
 }