Continue the switch table detection whack-a-mole. Add a check to
distinguish KASAN data reads from switch data reads. The switch jump
tables in .rodata have relocations associated with them.
This fixes the following warning:
crypto/asymmetric_keys/x509_cert_parser.o: warning: objtool:
x509_note_pkey_algo()+0xa4: sibling call from callable instruction with
modified stack frame
Reported-and-tested-by: Arnd Bergmann <a...@arndb.de>
Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com>
---
tools/objtool/check.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 472e64e95891..46c1d239cc1b 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -925,7 +925,11 @@ static struct rela *find_switch_table(struct objtool_file
*file,
if (find_symbol_containing(file->rodata, text_rela->addend))
continue;
- return find_rela_by_dest(file->rodata, text_rela->addend);
+ rodata_rela = find_rela_by_dest(file->rodata,
text_rela->addend);
+ if (!rodata_rela)
+ continue;
+
+ return rodata_rela;
}
return NULL;
--
2.14.3
