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Subject[PATCH] objtool: Add stackleak instrumentation to uaccess safe list
Date
If a function has a large stack frame, the stackleak plugin adds a call
to stackleak_track_stack() after the prologue.

This function may be called in uaccess-enabled code. Add it to the
uaccess safe list.

Fixes the following warning:

vmlinux.o: warning: objtool: kasan_report+0x12: call to stackleak_track_stack() with UACCESS enabled

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
tools/objtool/check.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index f937be1afe65..34bd6a11bddd 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1278,6 +1278,8 @@ static const char *uaccess_safe_builtin[] = {
"__ubsan_handle_type_mismatch_v1",
"__ubsan_handle_shift_out_of_bounds",
"__ubsan_handle_load_invalid_value",
+ /* STACKLEAK */
+ "stackleak_track_stack",
/* misc */
"csum_partial_copy_generic",
"copy_mc_fragile",
--
2.39.2
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