linux-kernel - [PATCH v5 04/21] modpost: squash report_extable_warnings() into extable_mismatch

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: <20230514152739.962109-5-masahiroy@kernel.org>
Date:   Mon, 15 May 2023 00:27:22 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Pitre <npitre@...libre.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: [PATCH v5 04/21] modpost: squash report_extable_warnings() into extable_mismatch_handler()

Collect relevant code into one place to clarify all the cases are
covered by 'if () ... else if ... else ...'.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 scripts/mod/modpost.c | 40 ++++++++++++++--------------------------
 1 file changed, 14 insertions(+), 26 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 371891d67175..7a9a3ef8ca0d 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1275,40 +1275,19 @@ static int is_executable_section(struct elf_info* elf, unsigned int section_inde
 	return ((elf->sechdrs[section_index].sh_flags & SHF_EXECINSTR) == SHF_EXECINSTR);
 }
 
-static void report_extable_warnings(const char* modname, struct elf_info* elf,
-				    const struct sectioncheck* const mismatch,
-				    Elf_Rela* r, Elf_Sym* sym,
-				    const char* fromsec, const char* tosec)
-{
-	Elf_Sym* tosym = find_elf_symbol(elf, r->r_addend, sym);
-	const char* tosym_name = sym_name(elf, tosym);
-
-	warn("%s(%s+0x%lx): Section mismatch in reference to the %s:%s\n",
-	     modname, fromsec, (long)r->r_offset, tosec, tosym_name);
-
-	if (!match(tosec, mismatch->bad_tosec) &&
-	    is_executable_section(elf, get_secindex(elf, sym)))
-		fprintf(stderr,
-			"The relocation at %s+0x%lx references\n"
-			"section \"%s\" which is not in the list of\n"
-			"authorized sections.  If you're adding a new section\n"
-			"and/or if this reference is valid, add \"%s\" to the\n"
-			"list of authorized sections to jump to on fault.\n"
-			"This can be achieved by adding \"%s\" to \n"
-			"OTHER_TEXT_SECTIONS in scripts/mod/modpost.c.\n",
-			fromsec, (long)r->r_offset, tosec, tosec, tosec);
-}
-
 static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
 				     const struct sectioncheck* const mismatch,
 				     Elf_Rela* r, Elf_Sym* sym,
 				     const char *fromsec)
 {
 	const char* tosec = sec_name(elf, get_secindex(elf, sym));
+	Elf_Sym *tosym = find_elf_symbol(elf, r->r_addend, sym);
+	const char *tosym_name = sym_name(elf, tosym);
 
 	sec_mismatch_count++;
 
-	report_extable_warnings(modname, elf, mismatch, r, sym, fromsec, tosec);
+	warn("%s(%s+0x%lx): Section mismatch in reference to the %s:%s\n",
+	     modname, fromsec, (long)r->r_offset, tosec, tosym_name);
 
 	if (match(tosec, mismatch->bad_tosec))
 		fatal("The relocation at %s+0x%lx references\n"
@@ -1317,7 +1296,16 @@ static void extable_mismatch_handler(const char* modname, struct elf_info *elf,
 		      "You might get more information about where this is\n"
 		      "coming from by using scripts/check_extable.sh %s\n",
 		      fromsec, (long)r->r_offset, tosec, modname);
-	else if (!is_executable_section(elf, get_secindex(elf, sym)))
+	else if (is_executable_section(elf, get_secindex(elf, sym)))
+		warn("The relocation at %s+0x%lx references\n"
+		     "section \"%s\" which is not in the list of\n"
+		     "authorized sections.  If you're adding a new section\n"
+		     "and/or if this reference is valid, add \"%s\" to the\n"
+		     "list of authorized sections to jump to on fault.\n"
+		     "This can be achieved by adding \"%s\" to\n"
+		     "OTHER_TEXT_SECTIONS in scripts/mod/modpost.c.\n",
+		     fromsec, (long)r->r_offset, tosec, tosec, tosec);
+	else
 		error("%s+0x%lx references non-executable section '%s'\n",
 		      fromsec, (long)r->r_offset, tosec);
 }
-- 
2.39.2