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- From 2c9eb7028c0714c3379b58a59c60f7b5b7a5adb0 Mon Sep 17 00:00:00 2001
- From: Josh Poimboeuf <[email protected]>
- Date: Tue, 3 Oct 2017 20:10:36 -0500
- Subject: [PATCH 037/232] objtool: Upgrade libelf-devel warning to error for
- CONFIG_ORC_UNWINDER
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
- CVE-2017-5754
- With CONFIG_ORC_UNWINDER, if the user doesn't have libelf-devel
- installed, and they don't see the make warning, their ORC unwinder will
- be silently broken. Upgrade the warning to an error.
- Reported-and-tested-by: Borislav Petkov <[email protected]>
- Signed-off-by: Josh Poimboeuf <[email protected]>
- Cc: Linus Torvalds <[email protected]>
- Cc: Peter Zijlstra <[email protected]>
- Cc: Thomas Gleixner <[email protected]>
- Link: http://lkml.kernel.org/r/d9dfc39fb8240998820f9efb233d283a1ee96084.1507079417.git.jpoimboe@redhat.com
- Signed-off-by: Ingo Molnar <[email protected]>
- (cherry picked from commit 3dd40cb320fee7c23b574ab821ce140ccd1281c9)
- Signed-off-by: Andy Whitcroft <[email protected]>
- Signed-off-by: Kleber Sacilotto de Souza <[email protected]>
- (cherry picked from commit c413466a72ca533ec126ebc0c5bb579ae0c96b1d)
- Signed-off-by: Fabian Grünbichler <[email protected]>
- ---
- Makefile | 6 +++++-
- 1 file changed, 5 insertions(+), 1 deletion(-)
- diff --git a/Makefile b/Makefile
- index 8e14a926fc94..490ce18685ea 100644
- --- a/Makefile
- +++ b/Makefile
- @@ -965,7 +965,11 @@ ifdef CONFIG_STACK_VALIDATION
- ifeq ($(has_libelf),1)
- objtool_target := tools/objtool FORCE
- else
- - $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
- + ifdef CONFIG_ORC_UNWINDER
- + $(error "Cannot generate ORC metadata for CONFIG_ORC_UNWINDER=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
- + else
- + $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
- + endif
- SKIP_STACK_VALIDATION := 1
- export SKIP_STACK_VALIDATION
- endif
- --
- 2.14.2
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