Make sure that calling uprobe syscall from outside uprobe trampoline
results in sigill signal.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
.../selftests/bpf/prog_tests/uprobe_syscall.c | 41 +++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c b/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c
index eacd14db8f8d..12631abc7017 100644
--- a/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c
+++ b/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c
@@ -607,6 +607,40 @@ static void test_uprobe_race(void)
for (i = 0; i < nr; i++)
pthread_join(threads[i], NULL);
}
+
+#ifndef __NR_uprobe
+#define __NR_uprobe 336
+#endif
+
+static void test_uprobe_sigill(void)
+{
+ int status, err, pid;
+
+ pid = fork();
+ if (!ASSERT_GE(pid, 0, "fork"))
+ return;
+ /* child */
+ if (pid == 0) {
+ asm volatile (
+ "pushq %rax\n"
+ "pushq %rcx\n"
+ "pushq %r11\n"
+ "movq $" __stringify(__NR_uprobe) ", %rax\n"
+ "syscall\n"
+ "popq %r11\n"
+ "popq %rcx\n"
+ "retq\n"
+ );
+ exit(0);
+ }
+
+ err = waitpid(pid, &status, 0);
+ ASSERT_EQ(err, pid, "waitpid");
+
+ /* verify the child got killed with SIGILL */
+ ASSERT_EQ(WIFSIGNALED(status), 1, "WIFSIGNALED");
+ ASSERT_EQ(WTERMSIG(status), SIGILL, "WTERMSIG");
+}
#else
static void test_uretprobe_regs_equal(void)
{
@@ -647,6 +681,11 @@ static void test_uprobe_race(void)
{
test__skip();
}
+
+static void test_uprobe_sigill(void)
+{
+ test__skip();
+}
#endif
void test_uprobe_syscall(void)
@@ -667,4 +706,6 @@ void test_uprobe_syscall(void)
test_uprobe_usdt();
if (test__start_subtest("uprobe_race"))
test_uprobe_race();
+ if (test__start_subtest("uprobe_sigill"))
+ test_uprobe_sigill();
}
--
2.47.0
