Messages in this thread Patch in this message | | | From | Gaosheng Cui <> | Subject | [PATCH] apparmor: fix a memleak in multi_transaction_new() | Date | Tue, 23 Aug 2022 09:15:03 +0800 |
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In multi_transaction_new(), the variable t is not freed or passed out on the failure of copy_from_user(t->data, buf, size), which could lead to a memleak.
Fix this bug by adding a put_multi_transaction(t) in the error path.
Fixes: 1dea3b41e84c5 ("apparmor: speed up transactional queries") Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com> --- security/apparmor/apparmorfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c index d066ccc219e2..7160e7aa58b9 100644 --- a/security/apparmor/apparmorfs.c +++ b/security/apparmor/apparmorfs.c @@ -868,8 +868,10 @@ static struct multi_transaction *multi_transaction_new(struct file *file, if (!t) return ERR_PTR(-ENOMEM); kref_init(&t->count); - if (copy_from_user(t->data, buf, size)) + if (copy_from_user(t->data, buf, size)) { + put_multi_transaction(t); return ERR_PTR(-EFAULT); + } return t; } -- 2.25.1
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