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apparmor: Fix memleak in aa_simple_write_to_buffer()

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commit 417ea9fe97 upstream.

When copy_from_user failed, the memory is freed by kvfree. however the
management struct and data blob are allocated independently, so only
kvfree(data) cause a memleak issue here. Use aa_put_loaddata(data) to
fix this issue.

Fixes: a6a52579e5 ("apparmor: split load data into management struct and data blob")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xiu Jianfeng 2022-06-14 17:00:01 +08:00 • committed by Justin Hammond
parent e70778fa09
commit d552cdde73
1 changed files with 1 additions and 1 deletions

2
security/apparmor/apparmorfs.c
View file

@ -401,7 +401,7 @@ static struct aa_loaddata *aa_simple_write_to_buffer(const char __user *userbuf,
data->size = copy_size;
if (copy_from_user(data->data, userbuf, copy_size)) {
kvfree(data);
aa_put_loaddata(data);
return ERR_PTR(-EFAULT);
}