On Tue, Apr 28, 2020 at 11:10:44AM -0500, Josh Poimboeuf wrote: > > ==> build/x86/0x2EA4CE4F_defconfig/log <== > > kernel/kcov.o: warning: objtool: write_comp_data()+0x1b: call to > > check_kcov_mode() with UACCESS enabled > > kernel/kcov.o: warning: objtool: __sanitizer_cov_trace_pc()+0x15: call to > > check_kcov_mode() with UACCESS enabled
From: Josh Poimboeuf <[email protected]> Subject: [PATCH] objtool: Add check_kcov_mode() to the uaccess safelist check_kcov_mode() is called by write_comp_data() and __sanitizer_cov_trace_pc(), which are already on the uaccess safe list. Might as well add check_kcov_mode() to the party. This fixes the following warnings: kernel/kcov.o: warning: objtool: __sanitizer_cov_trace_pc()+0x15: call to check_kcov_mode() with UACCESS enabled kernel/kcov.o: warning: objtool: write_comp_data()+0x1b: call to check_kcov_mode() with UACCESS enabled Reported-by: Arnd Bergmann <[email protected]> Signed-off-by: Josh Poimboeuf <[email protected]> --- tools/objtool/check.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 0c732d586924..fec890547e04 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -516,6 +516,7 @@ static const char *uaccess_safe_builtin[] = { "__tsan_write16", /* KCOV */ "write_comp_data", + "check_kcov_mode", "__sanitizer_cov_trace_pc", "__sanitizer_cov_trace_const_cmp1", "__sanitizer_cov_trace_const_cmp2", -- 2.21.1
