tests: check decoding of a subset of prctl operations

Check decoding of prctl operations that take the second syscall argument
as a pointer to an integer.

* tests/prctl-arg2-intptr.c: New file.
* tests/prctl-arg2-intptr.test: New test.
* tests/.gitignore: Add prctl-arg2-intptr.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(DECODER_TESTS): Add prctl-arg2-intptr.test.

diff --git a/tests/.gitignore b/tests/.gitignore
index 2f2c5d9e9d3fb1b49cab1821bbdcc70a77c66d5d..abc26bea295a9cea9f23e750862371c70b652a2a 100644 (file)
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -210,6 +210,7 @@ pkey_free
 pkey_mprotect
 poll
 ppoll
+prctl-arg2-intptr
 prctl-dumpable
 prctl-name
 prctl-no-args

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 793a0dc920d5a376f147aa54f8989de10afd8587..d1c2670a4d93f0b388fee25c623b023f7d9dc47f 100644 (file)
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -270,6 +270,7 @@ check_PROGRAMS = \
        pkey_mprotect \
        poll \
        ppoll \
+       prctl-arg2-intptr \
        prctl-dumpable \
        prctl-name \
        prctl-no-args \
@@ -656,6 +657,7 @@ DECODER_TESTS = \
        pkey_mprotect.test \
        poll.test \
        ppoll.test \
+       prctl-arg2-intptr.test \
        prctl-dumpable.test \
        prctl-name.test \
        prctl-no-args.test \

diff --git a/tests/prctl-arg2-intptr.c b/tests/prctl-arg2-intptr.c
new file mode 100644 (file)
index 0000000..ee000eb
--- /dev/null
+++ b/tests/prctl-arg2-intptr.c
@@ -0,0 +1,120 @@
+/*
+ * Check decoding of prctl operations which use arg2 as pointer to an integer
+ * value: PR_GET_CHILD_SUBREAPER, PR_GET_ENDIAN, PR_GET_FPEMU, and PR_GET_FPEXC.
+ *
+ * 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>
+
+#if defined __NR_prctl
+
+# include <stdint.h>
+# include <stdio.h>
+# include <unistd.h>
+# include <linux/prctl.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_addr1 =
+               (kernel_ulong_t) 0x1e55c0de00000000ULL;
+       static const kernel_ulong_t bogus_addr2 =
+               (kernel_ulong_t) 0xfffffffffffffffdULL;
+       static const kernel_ulong_t bogus_op_bits =
+               (kernel_ulong_t) 0xbadc0ded00000000ULL;
+       static const struct {
+               kernel_ulong_t val;
+               const char *str;
+       } options[] = {
+               { 37, "PR_GET_CHILD_SUBREAPER" },
+               { 19, "PR_GET_ENDIAN" },
+               {  9, "PR_GET_FPEMU" },
+               { 11, "PR_GET_FPEXC" },
+       };
+
+       unsigned int *ptr = tail_alloc(sizeof(*ptr));
+       long rc;
+       unsigned int i;
+
+       for (i = 0; i < ARRAY_SIZE(options); ++i) {
+               prctl(options[i].val | bogus_op_bits, 0);
+               printf("prctl(%s, NULL) = %s\n", options[i].str, errstr);
+
+               if (bogus_addr1) {
+                       prctl(options[i].val | bogus_op_bits, bogus_addr1);
+                       printf("prctl(%s, %#llx) = %s\n", options[i].str,
+                              (unsigned long long) bogus_addr1, errstr);
+               }
+
+               prctl(options[i].val | bogus_op_bits, bogus_addr2);
+               printf("prctl(%s, %#llx) = %s\n", options[i].str,
+                      (unsigned long long) bogus_addr2, errstr);
+
+               prctl(options[i].val | bogus_op_bits, (uintptr_t) (ptr + 1));
+               printf("prctl(%s, %p) = %s\n", options[i].str,
+                      ptr + 1, errstr);
+
+               rc = prctl(options[i].val | bogus_op_bits, (uintptr_t) ptr);
+               if (!rc) {
+                       printf("prctl(%s, [%u]) = %s\n",
+                              options[i].str, *ptr, errstr);
+               } else {
+                       printf("prctl(%s, %p) = %s\n",
+                              options[i].str, ptr, errstr);
+               }
+
+               if (F8ILL_KULONG_SUPPORTED) {
+                       kernel_ulong_t bogus_addr3 = f8ill_ptr_to_kulong(ptr);
+                       prctl(options[i].val | bogus_op_bits, bogus_addr3);
+                       printf("prctl(%s, %#llx) = %s\n", options[i].str,
+                              (unsigned long long) bogus_addr3, errstr);
+               }
+       }
+
+       puts("+++ exited with 0 +++");
+       return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_prctl")
+
+#endif

diff --git a/tests/prctl-arg2-intptr.test b/tests/prctl-arg2-intptr.test
new file mode 100755 (executable)
index 0000000..500399a
--- /dev/null
+++ b/tests/prctl-arg2-intptr.test
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Check decoding of prctl PR_GET_CHILD_SUBREAPER, PR_GET_ENDIAN, PR_GET_FPEMU,
+# and PR_GET_FPEXC operations.
+. "${srcdir=.}/init.sh"
+
+check_prog grep
+run_prog > /dev/null
+run_strace -a25 -eprctl $args > "$EXP"
+grep -v '^prctl(PR_[GS]ET_[^CEF][^HNP][^DEI]' < "$LOG" > "$OUT"
+match_diff "$OUT" "$EXP"
+
+rm -f "$EXP" "$OUT"