x86/uaccess, kcov: Disable stack protector
New tooling noticed this mishap: kernel/kcov.o: warning: objtool: write_comp_data()+0x138: call to __stack_chk_fail() with UACCESS enabled kernel/kcov.o: warning: objtool: __sanitizer_cov_trace_pc()+0xd9: call to __stack_chk_fail() with UACCESS enabled All the other instrumentation (KASAN,UBSAN) also have stack protector disabled. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -30,6 +30,7 @@ KCOV_INSTRUMENT_extable.o := n
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# Don't self-instrument.
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KCOV_INSTRUMENT_kcov.o := n
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KASAN_SANITIZE_kcov.o := n
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CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
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# cond_syscall is currently not LTO compatible
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CFLAGS_sys_ni.o = $(DISABLE_LTO)
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