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 0d7ec86403f49a7cbb342829c724b8f256d21d71..e2d07bb835b72d66a8b8b2404ad54f49f059f368 100644 (file)
--- 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 90851a46ace1bbc43a098360abb1a45ec741cda6..df7c882abbfca6df51e7685952250a1c8191c984 100644 (file)
--- 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 (file)
index 0000000..1049bce
--- /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 (executable)
index 0000000..08acb8b
--- /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"