linux-kernel - [tip: x86/urgent] objtool: Print data address for "!ENDBR" data warnings

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]

Date:   Tue, 19 Apr 2022 20:08:35 -0000
From:   "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/urgent] objtool: Print data address for "!ENDBR" data warnings

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     4baae989e638e9bf4b7d29bc5e36b581fddcca52
Gitweb:        https://git.kernel.org/tip/4baae989e638e9bf4b7d29bc5e36b581fddcca52
Author:        Josh Poimboeuf <jpoimboe@...hat.com>
AuthorDate:    Mon, 18 Apr 2022 09:50:29 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Tue, 19 Apr 2022 21:58:50 +02:00

objtool: Print data address for "!ENDBR" data warnings

When a "!ENDBR" warning is reported for a data section, objtool just
prints the text address of the relocation target twice, without giving
any clues about the location of the original data reference:

  vmlinux.o: warning: objtool: dcbnl_netdevice_event()+0x0: .text+0xb64680: data relocation to !ENDBR: dcbnl_netdevice_event+0x0

Instead, print the address of the data reference, in addition to the
address of the relocation target.

  vmlinux.o: warning: objtool: dcbnl_nb+0x0: .data..read_mostly+0xe260: data relocation to !ENDBR: dcbnl_netdevice_event+0x0

Fixes: 89bc853eae4a ("objtool: Find unused ENDBR instructions")
Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/762e88d51300e8eaf0f933a5b0feae20ac033bea.1650300597.git.jpoimboe@redhat.com
---
 tools/objtool/check.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index e3a675d..b822a6d 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -3817,11 +3817,8 @@ static int validate_ibt(struct objtool_file *file)
 			struct instruction *dest;
 
 			dest = validate_ibt_reloc(file, reloc);
-			if (is_data && dest && !dest->noendbr) {
-				warn_noendbr("data ", reloc->sym->sec,
-					     reloc->sym->offset + reloc->addend,
-					     dest);
-			}
+			if (is_data && dest && !dest->noendbr)
+				warn_noendbr("data ", sec, reloc->offset, dest);
 		}
 	}