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modpost: fix off by one in is_executable_section()

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[ Upstream commit 3a3f1e573a ]

The > comparison should be >= to prevent an out of bounds array
access.

Fixes: 52dc0595d5 ("modpost: handle relocations mismatch in __ex_table.")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter
2023-06-08 11:23:40 +03:00
committed by Greg Kroah-Hartman
parent f0350516b9
commit cb0cdca5c9
1 changed files with 1 additions and 1 deletions
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scripts/mod/modpost.c
+1 -1
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@@ -1621,7 +1621,7 @@ static void default_mismatch_handler(const char *modname, struct elf_info *elf,
static int is_executable_section(struct elf_info* elf, unsigned int section_index) static int is_executable_section(struct elf_info* elf, unsigned int section_index)
{ {
if (section_index > elf->num_sections) if (section_index >= elf->num_sections)
fatal("section_index is outside elf->num_sections!\n"); fatal("section_index is outside elf->num_sections!\n");
return ((elf->sechdrs[section_index].sh_flags & SHF_EXECINSTR) == SHF_EXECINSTR); return ((elf->sechdrs[section_index].sh_flags & SHF_EXECINSTR) == SHF_EXECINSTR);