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| author | Jiri Olsa <jolsa@kernel.org> | 2025-07-20 13:21:26 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-08-21 20:09:24 +0200 |
| commit | c11661bd9adf6831a75bb79299de793039dd8b9b (patch) | |
| tree | f3f0d3f0995d9cc801104ba183ac2e5d7d294b2f /tools/testing/selftests/bpf/prog_tests | |
| parent | selftests/bpf: Add hit/attach/detach race optimized uprobe test (diff) | |
| download | linux-c11661bd9adf6831a75bb79299de793039dd8b9b.tar.gz linux-c11661bd9adf6831a75bb79299de793039dd8b9b.zip | |
selftests/bpf: Add uprobe syscall sigill signal test
Make sure that calling uprobe syscall from outside uprobe trampoline
results in sigill signal.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20250720112133.244369-17-jolsa@kernel.org
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c b/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c index 3d27c8bc019e..02e98cba5cc6 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c @@ -735,6 +735,40 @@ cleanup: ASSERT_FALSE(USDT_SEMA_IS_ACTIVE(race), "race_semaphore"); } +#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"); +} + static void __test_uprobe_syscall(void) { if (test__start_subtest("uretprobe_regs_equal")) @@ -755,6 +789,8 @@ static 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(); } #else static void __test_uprobe_syscall(void) |