From patchwork Thu Mar 20 11:41:52 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 14023789 X-Patchwork-Delegate: bpf@iogearbox.net 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 12AE21CCEE2; Thu, 20 Mar 2025 11:45:16 +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=1742471119; cv=none; b=kNbRLIem+1eB+C82sYlBPg7VDdu5/F66QBT8+ZbtNX9JjYkyHtGgfAMdILNNunnIQonuE4Safx2k7Bl9CVW1rPNufJeD6z9fRweZZfB8wKa4ao0bAR5k1XYrEOZLBGkmv8BxuTP16ihWIoxAixPJmYrYoQvrnT9DJf3VYAjs6tM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742471119; c=relaxed/simple; bh=CmhOUNOyf8C5VZqhe+kYbT/wErrIykPEDyBCg4k/eMo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oFk1wJDkwyCC11nL6fc15hBFC1FJAtqkzhRsSEZySsN6NHvPCUYjbjsd5G7z0KRsO9X0bXicydcsG9olxdFmDtHnxZdmCo2NqwuCr3UyrOp0H87a0pzvi8M9sKM8XDKy0DE7IDqfp5r0x46Vi7cMHWiJXRb6zb2AdvJZKhP1lJA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WXj9ASwC; 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="WXj9ASwC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C999C4CEDD; Thu, 20 Mar 2025 11:45:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742471116; bh=CmhOUNOyf8C5VZqhe+kYbT/wErrIykPEDyBCg4k/eMo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WXj9ASwCqzSMdqU23qfJikG0DnpPw91K8hDBxXCue/rynXyq5wrIRs2DQNLtUrHWW cptTn/D7VNCtO0jp0I8hqWgD0X/TD1oTjAkkTGWL4VQTH/LzAQfdAQ3+vBN5276WvE NFeRjvGkj97+bTIdBR30D1tByOA0O+axTVQHAtXSJKtb5kJPvGJ188LGFdJJ2Zg/+3 83IwF5DsB0aLQRV+AI8xMtLsyjYFplcZhNcRbtkxHQTaE/jteFWKJt/Q9J1rs1rRUb bMyQ03rKdo2fBTaJGCcaUN5yXL/93PFDki3nOHr/zPdnGStF74sHT6HXhMR90V91Wb 9gQzJ2ZhsC4ng== 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_Wei=C3=9Fschuh?= Subject: [PATCH RFCv3 17/23] selftests/bpf: Add uprobe syscall sigill signal test Date: Thu, 20 Mar 2025 12:41:52 +0100 Message-ID: <20250320114200.14377-18-jolsa@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250320114200.14377-1-jolsa@kernel.org> References: <20250320114200.14377-1-jolsa@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC Make sure that calling uprobe syscall from outside uprobe trampoline results in sigill signal. 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 5c10cf173e6d..b3518f48329c 100644 --- a/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c +++ b/tools/testing/selftests/bpf/prog_tests/uprobe_syscall.c @@ -672,6 +672,40 @@ static void test_uprobe_race(void) 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"); +} + static void __test_uprobe_syscall(void) { if (test__start_subtest("uretprobe_regs_equal")) @@ -692,6 +726,8 @@ 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)