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    Subject[tip: x86/entry] x86/entry: Exclude low level entry code from sanitizing
    The following commit has been merged into the x86/entry branch of tip:

    Commit-ID: d13c070160256152bbc5d2072d39a339846fa5b7
    Gitweb: https://git.kernel.org/tip/d13c070160256152bbc5d2072d39a339846fa5b7
    Author: Peter Zijlstra <peterz@infradead.org>
    AuthorDate: Thu, 05 Mar 2020 14:01:25 +01:00
    Committer: Thomas Gleixner <tglx@linutronix.de>
    CommitterDate: Fri, 15 May 2020 20:03:05 +02:00

    x86/entry: Exclude low level entry code from sanitizing

    The sanitizers are not really applicable to the fragile low level entry
    code. Entry code needs to carefully setup a normal 'runtime' environment.

    Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
    Link: https://lkml.kernel.org/r/20200505134059.970057117@linutronix.de

    ---
    arch/x86/entry/Makefile | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile
    index 85eb381..cdf45ff 100644
    --- a/arch/x86/entry/Makefile
    +++ b/arch/x86/entry/Makefile
    @@ -3,6 +3,14 @@
    # Makefile for the x86 low level entry code
    #

    +KASAN_SANITIZE := n
    +UBSAN_SANITIZE := n
    +KCOV_INSTRUMENT := n
    +
    +CFLAGS_REMOVE_common.o = $(CC_FLAGS_FTRACE) -fstack-protector -fstack-protector-strong
    +CFLAGS_REMOVE_syscall_32.o = $(CC_FLAGS_FTRACE) -fstack-protector -fstack-protector-strong
    +CFLAGS_REMOVE_syscall_64.o = $(CC_FLAGS_FTRACE) -fstack-protector -fstack-protector-strong
    +
    OBJECT_FILES_NON_STANDARD_entry_64_compat.o := y

    CFLAGS_syscall_64.o += $(call cc-option,-Wno-override-init,)
    \
     
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