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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=xX5gUTsoboVAmCrU5x0kxTyEAN1I1znyOrkoj+71V3E=; b=qZBWz+91wC8CcbaSvv24JQZHzym3GtHvUPHuII+tqVdx7vNJFGxeTyXQbf6+pd3sNR 1i+SpIOvd06zwj0K2yOcFD+cgH5cLXAOm5K44mz+7s3Y+wOVoHJoRXdDhf/Ujq1CamPg NtXDSnrnaV3pYuPi2Ts9LNKfaZk14fvpv6WhuP+YHZrqkQogGzct+5KGTr6RLqVSTNXP M6ljp6qp6ZKbgFN1j4gsp/Y1a9LTJxw1O6jjm7+vEPXWH9PNMVIN9xLp2tHnuyuIgiXG NT35JQIoxnmvy9Pn7XBFXrsXHxNr6D1JNchDGmuG2RRVcLzGU9QTzzQMJrTjC76zBrnB 32Ng== X-Gm-Message-State: APjAAAXKwPf4y62UwhDRQE+VHGuH30IZsnqdrG+AcpMVnc51WItnpeKJ +8zMWnsh9DkJaecgED04y+sQXL96cQ3xhR96v0w= X-Google-Smtp-Source: APXvYqxwiguloHdhaLpo4FBp0WjObBKG43Zxu/Qf9Jmum2rfBGkEmvxrlieIAShHEtrTW/4mJFtXISqp4bSzlzbpPKY= X-Received: by 2002:a63:e148:: with SMTP id h8mr10684150pgk.297.1571415072880; Fri, 18 Oct 2019 09:11:12 -0700 (PDT) Date: Fri, 18 Oct 2019 09:10:24 -0700 In-Reply-To: <20191018161033.261971-1-samitolvanen@google.com> Message-Id: <20191018161033.261971-10-samitolvanen@google.com> Mime-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> X-Mailer: git-send-email 2.23.0.866.gb869b98d4c-goog Subject: [PATCH 09/18] trace: disable function graph tracing with SCS From: Sami Tolvanen To: Will Deacon , Catalin Marinas , Steven Rostedt , Ard Biesheuvel X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191018_091115_156712_DD0232F6 X-CRM114-Status: UNSURE ( 9.38 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Kees Cook , kernel-hardening@lists.openwall.com, Nick Desaulniers , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen , Laura Abbott , Dave Martin , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org With CONFIG_FUNCTION_GRAPH_TRACER, function return addresses are modified in ftrace_graph_caller and prepare_ftrace_return to redirect control flow to ftrace_return_to_handler. This is incompatible with return address protection. Signed-off-by: Sami Tolvanen --- kernel/trace/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index e08527f50d2a..b7e5e3bfa0f4 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -161,6 +161,7 @@ config FUNCTION_GRAPH_TRACER depends on HAVE_FUNCTION_GRAPH_TRACER depends on FUNCTION_TRACER depends on !X86_32 || !CC_OPTIMIZE_FOR_SIZE + depends on ROP_PROTECTION_NONE default y help Enable the kernel to trace a function at both its return -- 2.23.0.866.gb869b98d4c-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel