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 DF3462264B7; Mon, 22 Sep 2025 06:35:17 +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=1758522919; cv=none; b=eAPCHqYtxnytEUmiQ+xlSvmdGfQEPynlRk5ZoYmjWQYK4OmfMlfV9xfevXB8kJ9V5+CykkvGYYmaGs++gQ7cFaWrbyqUulq5Yyu6AGOMc0eKIrPfbma9qz6poP/lN8CswWn8RlHbdYWJoNAEhRCHRwTGmyK9fquhTSkrAjz/2Mg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758522919; c=relaxed/simple; bh=kLRuYvf4H++1ndDWeY8hcNRVnCSzRSNMXeygM2UcP9g=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=dE62yp56FNkktC5CwlkEzVBu4Mcrs2xfxNTWdsnF8OURT/QwSe93mSXnaIjrT4nkHFECy4XU89zS40fegiZrjSyqT9M+7MHNBatLNouIjXK1Vjo6tahDzJcubbqYSGprfk1czcsb6ru8/gKuZxIizQuXkA9Uef6s1vPzfcASuCg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VA5J72ji; 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="VA5J72ji" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 163A5C4CEF0; Mon, 22 Sep 2025 06:35:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758522917; bh=kLRuYvf4H++1ndDWeY8hcNRVnCSzRSNMXeygM2UcP9g=; h=From:To:Cc:Subject:Date:From; b=VA5J72jiVNDK3o8FyxgH1xmtK6pW6LBUhfX22zqzGUOBVcTHa9+UIaO8Kf3gNUa7Z ywEJflBD/bzmjz9Gyd+k9kCRcni4p3tj78FKu51cJLixgsl7SjmCSI77JHJWSQW7SP qrUX6+47qJxEICValQdlkGDYDk1qaAnUgYHlTOmtHkEnX4fAWukL46F2Iqa/ncDYBs 6IV9N5lMH09V7kpLhXuG9ZG5EnWkJf3obqPwW9SlRE7yrUUJRR/mw6yIU52UehvG4W v3JbBmJ1P3hfwBrEnHwVSxxvCKFCfW3ukaQE8/LPUSLxZ+oYMW3zAYmC/nFaRIDuju xOhoxYkcczgUg== From: "Masami Hiramatsu (Google)" To: Peter Zijlstra , Steven Rostedt , Menglong Dong Cc: jolsa@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, kees@kernel.org, samitolvanen@google.com, rppt@kernel.org, luto@kernel.org, mhiramat@kernel.org, ast@kernel.org, andrii@kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH v2 0/2] tracing: fprobe: Protect return handler from recursion loop Date: Mon, 22 Sep 2025 15:35:11 +0900 Message-ID: <175852291163.307379.14414635977719513326.stgit@devnote2> X-Mailer: git-send-email 2.43.0 User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit The following series fixes a recursive loop issue on fprobe by adding ftrace_test_recursion_trylock() in __ftrace_return_to_handler(). The previous version is here; https://lore.kernel.org/all/175828305637.117978.4183947592750468265.stgit@devnote2/ This v2 removes WARN_ON from __ftrace_return_to_handler() and adds kunit test cases for recursive call [2/2]. --- Masami Hiramatsu (Google) (2): tracing: fgraph: Protect return handler from recursion loop lib/test_fprobe: Add recursion check test cases kernel/trace/fgraph.c | 12 ++++++ lib/tests/test_fprobe.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 102 insertions(+), 2 deletions(-) -- Masami Hiramatsu (Google)