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| author | Gaosheng Cui <cuigaosheng1@huawei.com> | 2022-08-23 09:15:03 +0800 |
|---|---|---|
| committer | John Johansen <john.johansen@canonical.com> | 2022-10-03 14:48:54 -0700 |
| commit | c73275cf6834787ca090317f1d20dbfa3b7f05aa (patch) | |
| tree | f4f9f85efcdd62d31e8f6789da75b99b538a86e9 | |
| parent | 3cc40a443a04d52b0c95255dce264068b01e9bfe (diff) | |
| download | linux-stable-c73275cf6834787ca090317f1d20dbfa3b7f05aa.tar.gz linux-stable-c73275cf6834787ca090317f1d20dbfa3b7f05aa.tar.bz2 linux-stable-c73275cf6834787ca090317f1d20dbfa3b7f05aa.zip | |
apparmor: fix a memleak in multi_transaction_new()
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>
Signed-off-by: John Johansen <john.johansen@canonical.com>
| -rw-r--r-- | security/apparmor/apparmorfs.c | 4 |
1 files changed, 3 insertions, 1 deletions
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; } |