From 3a3f1e573a105328a2cca45a7cfbebabbf5e3192 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@linaro.org>
Date: Thu, 8 Jun 2023 11:23:40 +0300
Subject: [PATCH] modpost: fix off by one in is_executable_section()
The > comparison should be >= to prevent an out of bounds array
access.
Fixes: 52dc0595d540 ("modpost: handle relocations mismatch in __ex_table.")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
scripts/mod/modpost.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 3ea5eb2b1029b..8decf04633bc0 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1141,7 +1141,7 @@ static Elf_Sym *find_tosym(struct elf_info *elf, Elf_Addr addr, Elf_Sym *sym)
static bool is_executable_section(struct elf_info *elf, unsigned int secndx)
{
- if (secndx > elf->num_sections)
+ if (secndx >= elf->num_sections)
return false;
return (elf->sechdrs[secndx].sh_flags & SHF_EXECINSTR) != 0;
--
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