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btf: fix return value check in btf_vmlinux_init() 

In case of error, the function kobject_create_and_add() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

Fixes: 341dfcf8d7 ("btf: expose BTF info through sysfs")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Wei Yongjun 2019-08-16 02:40:44 +00:00 committed by Alexei Starovoitov
parent 82c4c3b7c7
commit e03250061b
1 changed files with 2 additions and 7 deletions
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9
kernel/bpf/sysfs_btf.c
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@ -30,17 +30,12 @@ static struct kobject *btf_kobj;
static int __init btf_vmlinux_init(void)
{
int err;
if (!_binary__btf_vmlinux_bin_start)
return 0;
btf_kobj = kobject_create_and_add("btf", kernel_kobj);
if (IS_ERR(btf_kobj)) {
err = PTR_ERR(btf_kobj);
btf_kobj = NULL;
return err;
}
if (!btf_kobj)
return -ENOMEM;
bin_attr_btf_vmlinux.size = _binary__btf_vmlinux_bin_end -
_binary__btf_vmlinux_bin_start;