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create-diff-object: section size check in rela_insn()

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Without this check we are risking returning uninitialized insn var.

Signed-off-by: Artem Savkov <asavkov@redhat.com>
This commit is contained in:
Artem Savkov 2019-08-01 11:43:33 +02:00
parent 7129bb48c9
commit f1263a4292
1 changed files with 4 additions and 0 deletions
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4
kpatch-build/create-diff-object.c
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@ -1238,6 +1238,10 @@ static void rela_insn(struct section *sec, struct rela *rela, struct insn *insn)
start = (unsigned long)sec->base->data->d_buf;
end = start + sec->base->sh.sh_size;
if (end <= start)
ERROR("bad section size");
rela_addr = start + rela->offset;
for (insn_addr = start; insn_addr < end; insn_addr += insn->length) {
insn_init(insn, (void *)insn_addr, 1);