From: Eugene Syromyatnikov <evgsyr@gmail.com>
Date: Sat, 10 Dec 2016 04:04:31 +0000 (+0300)
Subject: tests: check decoding of prctl PR_[GS]ET_DUMPABLE operations
X-Git-Tag: v4.16~352
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=73e9623acfb07dc249c5df16d700ffdfc42b3887;p=strace

tests: check decoding of prctl PR_[GS]ET_DUMPABLE operations

* tests/prctl-dumpable.c: New file.
* tests/prctl-dumpable.test: New test.
* tests/.gitignore: Add prctl-dumpable.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add prctl-dumpable.test.
---

diff --git a/tests/.gitignore b/tests/.gitignore
index 0d7ec864..e2d07bb8 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -209,6 +209,7 @@ pkey_free
 pkey_mprotect
 poll
 ppoll
+prctl-dumpable
 prctl-name
 prctl-pdeathsig
 prctl-seccomp-filter-v
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 90851a46..df7c882a 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -269,6 +269,7 @@ check_PROGRAMS = \
 	pkey_mprotect \
 	poll \
 	ppoll \
+	prctl-dumpable \
 	prctl-name \
 	prctl-pdeathsig \
 	prctl-seccomp-filter-v \
@@ -650,6 +651,7 @@ DECODER_TESTS = \
 	pkey_mprotect.test \
 	poll.test \
 	ppoll.test \
+	prctl-dumpable.test \
 	prctl-name.test \
 	prctl-pdeathsig.test \
 	prctl-seccomp-filter-v.test \
diff --git a/tests/prctl-dumpable.c b/tests/prctl-dumpable.c
new file mode 100644
index 00000000..1049bcee
--- /dev/null
+++ b/tests/prctl-dumpable.c
@@ -0,0 +1,106 @@
+/*
+ * Check decoding of prctl PR_GET_DUMPABLE/PR_SET_DUMPABLE operations.
+ *
+ * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
+ * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "tests.h"
+#include <asm/unistd.h>
+#include <linux/prctl.h>
+
+#if defined __NR_prctl && defined PR_GET_DUMPABLE && defined PR_SET_DUMPABLE
+
+# include <stdio.h>
+# include <unistd.h>
+
+static const char *errstr;
+
+static long
+prctl(kernel_ulong_t arg1, kernel_ulong_t arg2)
+{
+	static const kernel_ulong_t bogus_arg =
+		(kernel_ulong_t) 0xdeadbeefbadc0dedULL;
+	long rc = syscall(__NR_prctl, arg1, arg2, bogus_arg);
+	errstr = sprintrc(rc);
+	return rc;
+}
+
+int
+main(void)
+{
+	static const kernel_ulong_t bogus_dumpable1 =
+		(kernel_ulong_t) 0xdeadc0de00000001ULL;
+	static const kernel_ulong_t bogus_dumpable2 =
+		(kernel_ulong_t) 0xdeadc0defacebeefULL;
+
+	static const char * const args[] = {
+		"SUID_DUMP_DISABLE",
+		"SUID_DUMP_USER",
+		"SUID_DUMP_ROOT",
+	};
+
+	unsigned int i;
+
+	prctl(PR_SET_DUMPABLE, 3);
+	printf("prctl(PR_SET_DUMPABLE, 0x3 /* SUID_DUMP_??? */) = %s\n",
+	       errstr);
+
+	prctl(PR_SET_DUMPABLE, bogus_dumpable1);
+	if (bogus_dumpable1 == 1) {
+		printf("prctl(PR_SET_DUMPABLE, SUID_DUMP_USER) = %s\n", errstr);
+	} else {
+		printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */)"
+		       " = %s\n",
+		       (unsigned long long) bogus_dumpable1, errstr);
+	}
+
+	prctl(PR_SET_DUMPABLE, bogus_dumpable2);
+	printf("prctl(PR_SET_DUMPABLE, %#llx /* SUID_DUMP_??? */) = %s\n",
+	       (unsigned long long) bogus_dumpable2, errstr);
+
+	for (i = 0; i < ARRAY_SIZE(args); ++i) {
+		prctl(PR_SET_DUMPABLE, i);
+		printf("prctl(PR_SET_DUMPABLE, %s) = %s\n", args[i], errstr);
+
+		long rc = prctl(PR_GET_DUMPABLE, bogus_dumpable2);
+		if (rc >= 0 && rc < (long) ARRAY_SIZE(args)) {
+			printf("prctl(PR_GET_DUMPABLE) = %s (%s)\n",
+			       errstr, args[rc]);
+		} else {
+			printf("prctl(PR_GET_DUMPABLE) = %s\n", errstr);
+		}
+	}
+
+	puts("+++ exited with 0 +++");
+	return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_DUMPABLE && PR_SET_DUMPABLE")
+
+#endif
diff --git a/tests/prctl-dumpable.test b/tests/prctl-dumpable.test
new file mode 100755
index 00000000..08acb8b9
--- /dev/null
+++ b/tests/prctl-dumpable.test
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+# Check decoding of prctl PR_GET_DUMPABLE and PR_SET_DUMPABLE operations.
+. "${srcdir=.}/init.sh"
+
+check_prog grep
+run_prog > /dev/null
+run_strace -a23 -eprctl $args > "$EXP"
+grep -v '^prctl(PR_[GS]ET_[^D][^U]' < "$LOG" > "$OUT"
+match_diff "$OUT" "$EXP"
+
+rm -f "$EXP" "$OUT"