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objtool: Check for missing annotation entries in read_annotate()

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Add a sanity check to make sure none of the relocations for the
.discard.annotate_insn section have gone missing.

Acked-by: Petr Mladek <pmladek@suse.com>
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
This commit is contained in:
Josh Poimboeuf
2025-09-17 09:03:31 -07:00
parent 4cdee7888f
commit 3e4b5f66cf
1 changed files with 5 additions and 0 deletions
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5
tools/objtool/check.c
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@@ -2293,6 +2293,11 @@ static int read_annotate(struct objtool_file *file,
sec->sh.sh_entsize = 8;
}
if (sec_num_entries(sec) != sec_num_entries(sec->rsec)) {
ERROR("bad .discard.annotate_insn section: missing relocs");
return -1;
}
for_each_reloc(sec->rsec, reloc) {
type = *(u32 *)(sec->data->d_buf + (reloc_idx(reloc) * sec->sh.sh_entsize) + 4);
type = bswap_if_needed(file->elf, type);