diff options
| author | Tadeusz Struk <tadeusz.struk@linaro.org> | 2021-11-15 19:01:43 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-11-18 07:04:52 +0300 |
| commit | 3e6db079751afd527bf3db32314ae938dc571916 (patch) | |
| tree | 0836439dc111faab4307a8c53471575773cd7215 /net | |
| parent | c366ce28750e9633f8d4b07829a9cde0e59034eb (diff) | |
| download | linux-3e6db079751afd527bf3db32314ae938dc571916.tar.xz | |
tipc: check for null after calling kmemdup
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: tipc-discussion@lists.sourceforge.net
Cc: stable@vger.kernel.org # 5.15, 5.14, 5.10
[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Acked-by: Ying Xue <ying.xue@windriver.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Link: https://lore.kernel.org/r/20211115160143.5099-1-tadeusz.struk@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/tipc/crypto.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c index e701651f6533..b4d9419a015b 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); |