From: Masami Hiramatsu <mhiramat@kernel.org>
To: Steven Rostedt <rostedt@goodmis.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Shuah Khan <shuah@kernel.org>
Cc: mhiramat@kernel.org, linux-kernel@vger.kernel.org,
Andy Lutomirski <luto@amacapital.net>,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Changbin Du <changbin.du@gmail.com>, Jann Horn <jannh@google.com>,
Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@kernel.org>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Nadav Amit <namit@vmware.com>,
Peter Zijlstra <peterz@infradead.org>,
Joel Fernandes <joel@joelfernandes.org>,
yhs@fb.com
Subject: [PATCH v5 6/6] selftests/ftrace: Add user-memory access syntax testcase
Date: Fri, 1 Mar 2019 01:05:23 +0900 [thread overview]
Message-ID: <155136992362.2968.10825848432240513284.stgit@devbox> (raw)
In-Reply-To: <155136974478.2968.3105123100519786079.stgit@devbox>
Add a user-memory access syntax testcase which checks
new user-memory access syntax and ustring type.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
.../ftrace/test.d/kprobe/kprobe_args_user.tc | 31 ++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc
diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc
new file mode 100644
index 000000000000..996da9d1eec5
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc
@@ -0,0 +1,31 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# description: Kprobe event user-memory access
+
+[ -f kprobe_events ] || exit_unsupported # this is configurable
+
+grep -A10 "fetcharg:" README | grep -q 'ustring' || exit_unsupported
+grep -A10 "fetcharg:" README | grep -q '\[u\]<offset>' || exit_unsupported
+
+:;: "user-memory access syntax and ustring working on user memory";:
+echo 'p:myevent do_sys_open path=+0($arg2):ustring path2=+u0($arg2):string' \
+ > kprobe_events
+
+grep myevent kprobe_events | \
+ grep -q 'path=+0($arg2):ustring path2=+u0($arg2):string'
+echo 1 > events/kprobes/myevent/enable
+echo > /dev/null
+echo 0 > events/kprobes/myevent/enable
+
+grep myevent trace | grep -q 'path="/dev/null" path2="/dev/null"'
+
+:;: "user-memory access syntax and ustring not working with kernel memory";:
+echo 'p:myevent vfs_symlink path=+0($arg3):ustring path2=+u0($arg3):string' \
+ > kprobe_events
+echo 1 > events/kprobes/myevent/enable
+ln -s foo $TMPDIR/bar
+echo 0 > events/kprobes/myevent/enable
+
+grep myevent trace | grep -q 'path=(fault) path2=(fault)'
+
+exit 0
prev parent reply other threads:[~2019-02-28 16:05 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-28 16:02 [PATCH v5 0/6] tracing/probes: uaccess: Add support user-space access Masami Hiramatsu
2019-02-28 16:02 ` [PATCH v5 1/6] uaccess: Add user_access_ok() Masami Hiramatsu
2019-02-28 16:03 ` [PATCH v5 2/6] uaccess: Use user_access_ok() in user_access_begin() Masami Hiramatsu
2019-03-03 17:39 ` [uaccess] 780464aed0: WARNING:at_arch/x86/include/asm/uaccess.h:#strnlen_user/0x kernel test robot
2019-03-03 19:53 ` Linus Torvalds
2019-03-04 1:14 ` Masami Hiramatsu
2019-03-04 2:37 ` Linus Torvalds
2019-03-04 9:06 ` Masami Hiramatsu
2019-03-04 15:16 ` Masami Hiramatsu
2019-03-04 15:58 ` Jann Horn
2019-03-04 18:59 ` Linus Torvalds
2019-03-05 2:36 ` Masami Hiramatsu
2019-03-05 8:22 ` Masami Hiramatsu
2019-03-05 9:01 ` Masami Hiramatsu
2019-03-05 9:07 ` Peter Zijlstra
2019-03-05 13:58 ` Masami Hiramatsu
2019-03-05 14:53 ` Peter Zijlstra
2019-03-05 15:18 ` Masami Hiramatsu
2019-03-04 3:20 ` [LKP] " Rong Chen
2019-02-28 16:03 ` [PATCH v5 3/6] uaccess: Add non-pagefault user-space read functions Masami Hiramatsu
2019-02-28 22:49 ` Yonghong Song
2019-03-01 2:29 ` Masami Hiramatsu
2019-03-01 6:30 ` Yonghong Song
2019-02-28 16:04 ` [PATCH v5 4/6] tracing/probe: Add ustring type for user-space string Masami Hiramatsu
2019-02-28 16:04 ` [PATCH v5 5/6] tracing/probe: Support user-space dereference Masami Hiramatsu
2019-02-28 16:05 ` Masami Hiramatsu [this message]
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