From patchwork Sun May 26 10:11:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 13674236 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 DF007C13B; Sun, 26 May 2024 10:11:09 +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=1716718270; cv=none; b=Ep81/eA5xAT7PQZGA0HQOYpn4+tXXGWq+C9wWETVh20oZ+PAN8q+cCKF1PJw5cOOH8HHQlPnEHnBSjMJdQpCPL3MmfZLl3ZqABDmh8Nl0pFz7TW/HYhn2vkIxr59ZC3kyOPejBhd4+Y2m6tnm36A4i9BTLJC3EUW/pcowpoKzVU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716718270; c=relaxed/simple; bh=ExNbeXVDysGxFSj45hMeUivmp45zzCzZyclBxRzG3wo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=s7xCieae7q2lzEGjn0pyIXyoNsaOfuY6SQBFZcynEHkWWmavJrA11wMwok1Y+uzzkRl1PGbbJ0Yf26t7ONVikDiiNTH3Oz6NOrTxI2vDCmUGhocl4nWaIZh30PflldFKoDVzAVsg4NKBfilJ1bSW/gUshl+5TqmF7sOAPbQ39Yw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tm21fefb; 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="tm21fefb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAD02C2BD10; Sun, 26 May 2024 10:11:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1716718269; bh=ExNbeXVDysGxFSj45hMeUivmp45zzCzZyclBxRzG3wo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tm21fefbu+FtBeH4IQaeihPW53mU7145bH9/ZTzgdioI3xeT4XSinXxlz9aRGGRhv ZTutQtSk04BFqIPp4IG/nFAk1iQAKgjRCVDZaOZXXFR6jXCqC9GB+o1GgITx6+wBr7 WnyUF35j2R4NDJuLy/buolxWAOu0ZettwIajJihXVyZp32zeq1NqvwARSnLhSlES1A 5NI1jPZHzcmnHNnrUksBtUcEvSEWlv3ZJ4j4yUWRrKLw0J0yvzI9LavPncc764eiyF D/62OyolckUQIuptM9SuCV2vW0cUZuPVHhDqZGnSH2lMez0Y41ywcsdIqkhxweZwfP ZRYJGy0zbGJew== From: "Masami Hiramatsu (Google)" To: Steven Rostedt Cc: LKML , Linux Trace Kernel , Masami Hiramatsu , Tom Zanussi Subject: [PATCH 1/3] tracing: Build event generation tests only as modules Date: Sun, 26 May 2024 19:11:06 +0900 Message-Id: <171671826593.39694.14023727434191502195.stgit@devnote2> X-Mailer: git-send-email 2.34.1 In-Reply-To: <171671825710.39694.6859036369216249956.stgit@devnote2> References: <171671825710.39694.6859036369216249956.stgit@devnote2> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Masami Hiramatsu (Google) Since the kprobes and synth event generation tests adds and enable generated events in init_module() and delete it in exit_module(), if we make it as built-in, those events are left in kernel and cause kprobe event self-test failure. [ 97.349708] ------------[ cut here ]------------ [ 97.353453] WARNING: CPU: 3 PID: 1 at kernel/trace/trace_kprobe.c:2133 kprobe_trace_self_tests_init+0x3f1/0x480 [ 97.357106] Modules linked in: [ 97.358488] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 6.9.0-g699646734ab5-dirty #14 [ 97.361556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 [ 97.363880] RIP: 0010:kprobe_trace_self_tests_init+0x3f1/0x480 [ 97.365538] Code: a8 24 08 82 e9 ae fd ff ff 90 0f 0b 90 48 c7 c7 e5 aa 0b 82 e9 ee fc ff ff 90 0f 0b 90 48 c7 c7 2d 61 06 82 e9 8e fd ff ff 90 <0f> 0b 90 48 c7 c7 33 0b 0c 82 89 c6 e8 6e 03 1f ff 41 ff c7 e9 90 [ 97.370429] RSP: 0000:ffffc90000013b50 EFLAGS: 00010286 [ 97.371852] RAX: 00000000fffffff0 RBX: ffff888005919c00 RCX: 0000000000000000 [ 97.373829] RDX: ffff888003f40000 RSI: ffffffff8236a598 RDI: ffff888003f40a68 [ 97.375715] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 97.377675] R10: ffffffff811c9ae5 R11: ffffffff8120c4e0 R12: 0000000000000000 [ 97.379591] R13: 0000000000000001 R14: 0000000000000015 R15: 0000000000000000 [ 97.381536] FS: 0000000000000000(0000) GS:ffff88807dcc0000(0000) knlGS:0000000000000000 [ 97.383813] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.385449] CR2: 0000000000000000 CR3: 0000000002244000 CR4: 00000000000006b0 [ 97.387347] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.389277] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.391196] Call Trace: [ 97.391967] [ 97.392647] ? __warn+0xcc/0x180 [ 97.393640] ? kprobe_trace_self_tests_init+0x3f1/0x480 [ 97.395181] ? report_bug+0xbd/0x150 [ 97.396234] ? handle_bug+0x3e/0x60 [ 97.397311] ? exc_invalid_op+0x1a/0x50 [ 97.398434] ? asm_exc_invalid_op+0x1a/0x20 [ 97.399652] ? trace_kprobe_is_busy+0x20/0x20 [ 97.400904] ? tracing_reset_all_online_cpus+0x15/0x90 [ 97.402304] ? kprobe_trace_self_tests_init+0x3f1/0x480 [ 97.403773] ? init_kprobe_trace+0x50/0x50 [ 97.404972] do_one_initcall+0x112/0x240 [ 97.406113] do_initcall_level+0x95/0xb0 [ 97.407286] ? kernel_init+0x1a/0x1a0 [ 97.408401] do_initcalls+0x3f/0x70 [ 97.409452] kernel_init_freeable+0x16f/0x1e0 [ 97.410662] ? rest_init+0x1f0/0x1f0 [ 97.411738] kernel_init+0x1a/0x1a0 [ 97.412788] ret_from_fork+0x39/0x50 [ 97.413817] ? rest_init+0x1f0/0x1f0 [ 97.414844] ret_from_fork_asm+0x11/0x20 [ 97.416285] [ 97.417134] irq event stamp: 13437323 [ 97.418376] hardirqs last enabled at (13437337): [] console_unlock+0x11c/0x150 [ 97.421285] hardirqs last disabled at (13437370): [] console_unlock+0x101/0x150 [ 97.423838] softirqs last enabled at (13437366): [] handle_softirqs+0x23f/0x2a0 [ 97.426450] softirqs last disabled at (13437393): [] __irq_exit_rcu+0x66/0xd0 [ 97.428850] ---[ end trace 0000000000000000 ]--- To avoid this issue, build these tests only as modules. Fixes: 9fe41efaca08 ("tracing: Add synth event generation test module") Fixes: 64836248dda2 ("tracing: Add kprobe event command generation test module") Signed-off-by: Masami Hiramatsu (Google) --- kernel/trace/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 166ad5444eea..721c3b221048 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -1136,7 +1136,7 @@ config PREEMPTIRQ_DELAY_TEST config SYNTH_EVENT_GEN_TEST tristate "Test module for in-kernel synthetic event generation" - depends on SYNTH_EVENTS + depends on SYNTH_EVENTS && m help This option creates a test module to check the base functionality of in-kernel synthetic event definition and @@ -1149,7 +1149,7 @@ config SYNTH_EVENT_GEN_TEST config KPROBE_EVENT_GEN_TEST tristate "Test module for in-kernel kprobe event generation" - depends on KPROBE_EVENTS + depends on KPROBE_EVENTS && m help This option creates a test module to check the base functionality of in-kernel kprobe event definition.