Acked-by: Jon Maloy <jma...@redhat.com>
On 11/15/21 11:01, Tadeusz Struk wrote:
kmemdup can return a null pointer so need to check for it, otherwise
the null key will be dereferenced later in tipc_crypto_key_xmit as
can be seen in the trace [1].
Cc: Jon Maloy <jma...@redhat.com>
Cc: Ying Xue <ying....@windriver.com>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Jakub Kicinski <k...@kernel.org>
Cc: net...@vger.kernel.org
Cc: tipc-discussion@lists.sourceforge.net
Cc: linux-ker...@vger.kernel.org
Cc: sta...@vger.kernel.org # 5.15, 5.14, 5.10
[1]
https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58
Reported-by: Dmitry Vyukov <dvyu...@google.com>
Signed-off-by: Tadeusz Struk <tadeusz.st...@linaro.org>
---
Changed in v2:
- use tipc_aead_free() to free all crytpo tfm instances
that might have been allocated before the fail.
---
net/tipc/crypto.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
index dc60c32bb70d..d293614d5fc6 100644
--- a/net/tipc/crypto.c
+++ b/net/tipc/crypto.c
@@ -597,6 +597,10 @@ static int tipc_aead_init(struct tipc_aead **aead, struct
tipc_aead_key *ukey,
tmp->cloned = NULL;
tmp->authsize = TIPC_AES_GCM_TAG_SIZE;
tmp->key = kmemdup(ukey, tipc_aead_key_size(ukey), GFP_KERNEL);
+ if (!tmp->key) {
+ tipc_aead_free(&tmp->rcu);
+ return -ENOMEM;
+ }
memcpy(&tmp->salt, ukey->key + keylen, TIPC_AES_GCM_SALT_SIZE);
atomic_set(&tmp->users, 0);
atomic64_set(&tmp->seqno, 0);
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