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authorPeter Zijlstra <peterz@infradead.org>2023-01-12 22:43:56 +0300
committerIngo Molnar <mingo@kernel.org>2023-01-13 13:48:17 +0300
commitf18b0d7ee815abb33eb1cc540fdde64fbb922d1a (patch)
tree17f9a9c11cfaddcf81309b1a903bf66e0cbf64b3 /tools/objtool
parentca502fc6d9d90c8384eb3e97e964177521d9df48 (diff)
downloadlinux-f18b0d7ee815abb33eb1cc540fdde64fbb922d1a.tar.xz
ubsan: Fix objtool UACCESS warns
clang-14 allyesconfig gives: vmlinux.o: warning: objtool: emulator_cmpxchg_emulated+0x705: call to __ubsan_handle_load_invalid_value() with UACCESS enabled vmlinux.o: warning: objtool: paging64_update_accessed_dirty_bits+0x39e: call to __ubsan_handle_load_invalid_value() with UACCESS enabled vmlinux.o: warning: objtool: paging32_update_accessed_dirty_bits+0x390: call to __ubsan_handle_load_invalid_value() with UACCESS enabled vmlinux.o: warning: objtool: ept_update_accessed_dirty_bits+0x43f: call to __ubsan_handle_load_invalid_value() with UACCESS enabled Add the required eflags save/restore and whitelist the thing. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/r/20230112195541.906007455@infradead.org
Diffstat (limited to 'tools/objtool')
-rw-r--r--tools/objtool/check.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 64954aa83522..9767babfd9ed 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1216,6 +1216,7 @@ static const char *uaccess_safe_builtin[] = {
"__ubsan_handle_type_mismatch",
"__ubsan_handle_type_mismatch_v1",
"__ubsan_handle_shift_out_of_bounds",
+ "__ubsan_handle_load_invalid_value",
/* misc */
"csum_partial_copy_generic",
"copy_mc_fragile",