The following commit has been merged into the core/entry branch of tip:
Commit-ID: 8c8fa605f7b8b6df3e6fb280a74cff8d7374a7b7
Gitweb: https://git.kernel.org/tip/8c8fa605f7b8b6df3e6fb280a74cff8d7374a7b7
Author: Gregory Price <gourry.memverge@xxxxxxxxx>
AuthorDate: Fri, 07 Apr 2023 13:18:34 -04:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Sun, 16 Apr 2023 14:23:08 +02:00
selftest, ptrace: Add selftest for syscall user dispatch config api
Validate that the following new ptrace requests work as expected
* PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG
returns the contents of task->syscall_dispatch
* PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG
sets the contents of task->syscall_dispatch
Signed-off-by: Gregory Price <gregory.price@xxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230407171834.3558-5-gregory.price@xxxxxxxxxxxx
---
tools/testing/selftests/ptrace/.gitignore | 1 +-
tools/testing/selftests/ptrace/Makefile | 2 +-
tools/testing/selftests/ptrace/get_set_sud.c | 72 +++++++++++++++++++-
3 files changed, 74 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/ptrace/get_set_sud.c
diff --git a/tools/testing/selftests/ptrace/.gitignore b/tools/testing/selftests/ptrace/.gitignore
index 792318a..b7dde15 100644
--- a/tools/testing/selftests/ptrace/.gitignore
+++ b/tools/testing/selftests/ptrace/.gitignore
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
get_syscall_info
+get_set_sud
peeksiginfo
vmaccess
diff --git a/tools/testing/selftests/ptrace/Makefile b/tools/testing/selftests/ptrace/Makefile
index 96ffa94..1c63174 100644
--- a/tools/testing/selftests/ptrace/Makefile
+++ b/tools/testing/selftests/ptrace/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
CFLAGS += -std=c99 -pthread -Wall $(KHDR_INCLUDES)
-TEST_GEN_PROGS := get_syscall_info peeksiginfo vmaccess
+TEST_GEN_PROGS := get_syscall_info peeksiginfo vmaccess get_set_sud
include ../lib.mk
diff --git a/tools/testing/selftests/ptrace/get_set_sud.c b/tools/testing/selftests/ptrace/get_set_sud.c
new file mode 100644
index 0000000..5297b10
--- /dev/null
+++ b/tools/testing/selftests/ptrace/get_set_sud.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include "../kselftest_harness.h"
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/wait.h>
+#include <sys/syscall.h>
+#include <sys/prctl.h>
+
+#include "linux/ptrace.h"
+
+static int sys_ptrace(int request, pid_t pid, void *addr, void *data)
+{
+ return syscall(SYS_ptrace, request, pid, addr, data);
+}
+
+TEST(get_set_sud)
+{
+ struct ptrace_sud_config config;
+ pid_t child;
+ int ret = 0;
+ int status;
+
+ child = fork();
+ ASSERT_GE(child, 0);
+ if (child == 0) {
+ ASSERT_EQ(0, sys_ptrace(PTRACE_TRACEME, 0, 0, 0)) {
+ TH_LOG("PTRACE_TRACEME: %m");
+ }
+ kill(getpid(), SIGSTOP);
+ _exit(1);
+ }
+
+ waitpid(child, &status, 0);
+
+ memset(&config, 0xff, sizeof(config));
+ config.mode = PR_SYS_DISPATCH_ON;
+
+ ret = sys_ptrace(PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG, child,
+ (void *)sizeof(config), &config);
+
+ ASSERT_EQ(ret, 0);
+ ASSERT_EQ(config.mode, PR_SYS_DISPATCH_OFF);
+ ASSERT_EQ(config.selector, 0);
+ ASSERT_EQ(config.offset, 0);
+ ASSERT_EQ(config.len, 0);
+
+ config.mode = PR_SYS_DISPATCH_ON;
+ config.selector = 0;
+ config.offset = 0x400000;
+ config.len = 0x1000;
+
+ ret = sys_ptrace(PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG, child,
+ (void *)sizeof(config), &config);
+
+ ASSERT_EQ(ret, 0);
+
+ memset(&config, 1, sizeof(config));
+ ret = sys_ptrace(PTRACE_GET_SYSCALL_USER_DISPATCH_CONFIG, child,
+ (void *)sizeof(config), &config);
+
+ ASSERT_EQ(ret, 0);
+ ASSERT_EQ(config.mode, PR_SYS_DISPATCH_ON);
+ ASSERT_EQ(config.selector, 0);
+ ASSERT_EQ(config.offset, 0x400000);
+ ASSERT_EQ(config.len, 0x1000);
+
+ kill(child, SIGKILL);
+}
+
+TEST_HARNESS_MAIN
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