2018-01-06 17:13:39 +03:00
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From 2c9eb7028c0714c3379b58a59c60f7b5b7a5adb0 Mon Sep 17 00:00:00 2001
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From: Josh Poimboeuf <jpoimboe@redhat.com>
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Date: Tue, 3 Oct 2017 20:10:36 -0500
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2018-01-08 13:50:09 +03:00
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Subject: [PATCH 037/242] objtool: Upgrade libelf-devel warning to error for
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2018-01-06 17:13:39 +03:00
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CONFIG_ORC_UNWINDER
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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CVE-2017-5754
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With CONFIG_ORC_UNWINDER, if the user doesn't have libelf-devel
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installed, and they don't see the make warning, their ORC unwinder will
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be silently broken. Upgrade the warning to an error.
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Reported-and-tested-by: Borislav Petkov <bp@alien8.de>
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Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
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Cc: Linus Torvalds <torvalds@linux-foundation.org>
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Cc: Peter Zijlstra <peterz@infradead.org>
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Cc: Thomas Gleixner <tglx@linutronix.de>
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Link: http://lkml.kernel.org/r/d9dfc39fb8240998820f9efb233d283a1ee96084.1507079417.git.jpoimboe@redhat.com
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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(cherry picked from commit 3dd40cb320fee7c23b574ab821ce140ccd1281c9)
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Signed-off-by: Andy Whitcroft <apw@canonical.com>
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Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
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(cherry picked from commit c413466a72ca533ec126ebc0c5bb579ae0c96b1d)
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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Makefile | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/Makefile b/Makefile
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index 8e14a926fc94..490ce18685ea 100644
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--- a/Makefile
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+++ b/Makefile
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@@ -965,7 +965,11 @@ ifdef CONFIG_STACK_VALIDATION
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ifeq ($(has_libelf),1)
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objtool_target := tools/objtool FORCE
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else
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- $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
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+ ifdef CONFIG_ORC_UNWINDER
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+ $(error "Cannot generate ORC metadata for CONFIG_ORC_UNWINDER=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
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+ else
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+ $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
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+ endif
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SKIP_STACK_VALIDATION := 1
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export SKIP_STACK_VALIDATION
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endif
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--
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2.14.2
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