From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 464A51F5423; Sun, 20 Jul 2025 11:24:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753010681; cv=none; b=IKWn0SeNk1XKEyF4tABjTcRCGpko6dSytxK3iN175RN/b4xLBNxrlt/k2Y1x+upWGV2dn42KWITAB+akvkTMTdfBFVKupJq6DJ6+cIZ50UhomFB2RjJ22e0POIbT2Mb5+wqhoLCMmRRrcg/ab9JCj3GUm6tv34TrDB35Z3SPczI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753010681; c=relaxed/simple; bh=NBQnh8MyNYWIoskdzLseSfov7zi9ofoZZPrWYPz0A9g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ugbgJb9xDEISA3XPhquqNgWNq5HPF689VfCuFEtR38qVmR0/wRV18HIwZ62rDorn1QBg7WkKMCkjn56Ns1ZfgN+5A2QKxA0ibcvDt+D/KcIbdDhO5/NuaV2HZZrfWMcorbMnaJOvrVwz/v3IOc/A3tAH7ue3oYvJVp3gacM6B9w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rZZmH+YF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rZZmH+YF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B13EC4CEE7; Sun, 20 Jul 2025 11:24:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753010681; bh=NBQnh8MyNYWIoskdzLseSfov7zi9ofoZZPrWYPz0A9g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rZZmH+YFl1ejyc/xQ0wAfEUgQqgSuIG96TnQWfoE3skG6IAw+IdL5OwPUUOy6oU1m C5cIQ41QZORpoZRy00tSWnrp+j7ijx/bGXAKrQ8Hhb89vE0Nkd9dKiaQ/Nb+ky6erN UIJozftKpeCbTUl0QRxJj8U6aFErmCd3tAnQRa49/FGG6JOvhk7o4DXN+o8W1OpTZ+ RxfQPMIoYNmzDKXZqEkAbpWuFXETPqI99xJ78IHZ3Tf/p10YOQ1Ae80oVp3HQ2CA68 TW6gN4spVeA1X7KxEwyTAPM2i8t9hQKP2ns7myijiN70iGs8f4761wyUvO+8fI4hIa UYydsp8XZ7yRw== From: Jiri Olsa To: Oleg Nesterov , Peter Zijlstra , Andrii Nakryiko Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, x86@kernel.org, Song Liu , Yonghong Song , John Fastabend , Hao Luo , Steven Rostedt , Masami Hiramatsu , Alan Maguire , David Laight , =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Ingo Molnar Subject: [PATCHv6 perf/core 16/22] selftests/bpf: Add uprobe syscall sigill signal test Date: Sun, 20 Jul 2025 13:21:26 +0200 Message-ID: <20250720112133.244369-17-jolsa@kernel.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250720112133.244369-1-jolsa@kernel.org> References: <20250720112133.244369-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Make sure that calling uprobe syscall from outside uprobe trampoline results in sigill signal. Acked-by: Andrii Nakryiko Signed-off-by: Jiri Olsa --- .../selftests/bpf/prog_tests/uprobe_syscall.c | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) 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 @@ static void test_uprobe_race(void) 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) -- 2.50.1