linux-kernel - [PATCH 02/10] objtool: check: Remove redundant checks on operand type

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200325084203.17005-3-jthierry@redhat.com>
Date:   Wed, 25 Mar 2020 08:41:55 +0000
From:   Julien Thierry <jthierry@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     jpoimboe@...hat.com, peterz@...radead.org, raphael.gault@....com,
        Julien Thierry <jthierry@...hat.com>
Subject: [PATCH 02/10] objtool: check: Remove redundant checks on operand type

POP operations are already in code path where destination operand
is OP_DEST_REG. There is no need to check the operand type again.

Signed-off-by: Julien Thierry <jthierry@...hat.com>
---
 tools/objtool/check.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index a2c62bc82907..44a3abbb0b0b 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1730,15 +1730,13 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state)
 
 		case OP_SRC_POP:
 		case OP_SRC_POPF:
-			if (!state->drap && op->dest.type == OP_DEST_REG &&
-			    op->dest.reg == cfa->base) {
+			if (!state->drap && op->dest.reg == cfa->base) {
 
 				/* pop %rbp */
 				cfa->base = CFI_SP;
 			}
 
 			if (state->drap && cfa->base == CFI_BP_INDIRECT &&
-			    op->dest.type == OP_DEST_REG &&
 			    op->dest.reg == state->drap_reg &&
 			    state->drap_offset == -state->stack_size) {
 
-- 
2.21.1