From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Fri, 18 Nov 2016 17:36:21 +0000 (+0300)
Subject: prctl: cast arg2 to int in PR_SET_PTRACER handler
X-Git-Tag: v4.15~101
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6b7ad9947bb9766b07594a6cd1e46e01980f78b6;p=strace

prctl: cast arg2 to int in PR_SET_PTRACER handler

Kernel code does this when compares it with -1 (apart from comparing it with
PR_SET_PTRACER_ANY, which is also -1) in security/yama/yama_lsm.c.

* prctl.c (SYS_FUNC(prctl)) <PR_SET_PTRACER>: Cast arg2 to int before
comparing it with -1.
---

diff --git a/prctl.c b/prctl.c
index e8dd4e81..fb244563 100644
--- a/prctl.c
+++ b/prctl.c
@@ -255,7 +255,7 @@ SYS_FUNC(prctl)
 
 	case PR_SET_PTRACER:
 		tprints(", ");
-		if (arg2 == -1)
+		if ((int) arg2 == -1)
 			tprints("PR_SET_PTRACER_ANY");
 		else
 			tprintf("%llu", arg2);