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create-diff-object: check mallor retval in kpatch_create_mcount_sections()

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newdata variable is allocated through malloc call and requires a NULL
check.

Found by covscan, see issue #984 for full log.

Signed-off-by: Artem Savkov <asavkov@redhat.com>
This commit is contained in:
Artem Savkov 2019-07-31 13:58:20 +02:00
parent deb7719280
commit dba95bae62
1 changed files with 3 additions and 0 deletions
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3
kpatch-build/create-diff-object.c
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@ -3156,6 +3156,9 @@ static void kpatch_create_mcount_sections(struct kpatch_elf *kelf)
* __fentry__" so that ftrace will be happy.
*/
newdata = malloc(sym->sec->data->d_size);
if (!newdata)
ERROR("malloc");
memcpy(newdata, sym->sec->data->d_buf, sym->sec->data->d_size);
sym->sec->data->d_buf = newdata;
insn = newdata;