[PATCH 42/43] objtool: kmsan: list KMSAN API functions as uaccess-safe
From: Alexander Potapenko <glider@google.com>
Date: 2021-12-14 16:25:26
Also in:
linux-mm, lkml
Subsystem:
objtool, the rest · Maintainers:
Josh Poimboeuf, Peter Zijlstra, Linus Torvalds
KMSAN inserts API function calls in a lot of places (function entries and exits, local variables, memory accesses), so they may get called from the uaccess regions as well. Signed-off-by: Alexander Potapenko <glider@google.com> --- Link: https://linux-review.googlesource.com/id/I242bc9816273fecad4ea3d977393784396bb3c35 --- tools/objtool/check.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 21735829b860c..9620b5224754e 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c@@ -937,6 +937,25 @@ static const char *uaccess_safe_builtin[] = { "__sanitizer_cov_trace_cmp4", "__sanitizer_cov_trace_cmp8", "__sanitizer_cov_trace_switch", + /* KMSAN */ + "kmsan_copy_to_user", + "kmsan_report", + "kmsan_unpoison_memory", + "__msan_chain_origin", + "__msan_get_context_state", + "__msan_instrument_asm_store", + "__msan_metadata_ptr_for_load_1", + "__msan_metadata_ptr_for_load_2", + "__msan_metadata_ptr_for_load_4", + "__msan_metadata_ptr_for_load_8", + "__msan_metadata_ptr_for_load_n", + "__msan_metadata_ptr_for_store_1", + "__msan_metadata_ptr_for_store_2", + "__msan_metadata_ptr_for_store_4", + "__msan_metadata_ptr_for_store_8", + "__msan_metadata_ptr_for_store_n", + "__msan_poison_alloca", + "__msan_warning", /* UBSAN */ "ubsan_type_mismatch_common", "__ubsan_handle_type_mismatch",
--
2.34.1.173.g76aa8bc2d0-goog