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| author |   Artem Chernyshev <artem.chernyshev@red-soft.ru> | 2022-12-06 09:58:34 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-12-09 08:45:44 +0000 |
| commit | 44aa5a6dba8283bfda28b1517af4de711c5652a4 (patch) | |
| tree | f0dfa6298f4a1376ff2444aec263a138c6c4d71a | |
| parent | Merge tag 'net-6.1-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net (diff) | |
| download | wireguard-linux-44aa5a6dba8283bfda28b1517af4de711c5652a4.tar.xz wireguard-linux-44aa5a6dba8283bfda28b1517af4de711c5652a4.zip | |
net: vmw_vsock: vmci: Check memcpy_from_msg()
vmci_transport_dgram_enqueue() does not check the return value
of memcpy_from_msg(). If memcpy_from_msg() fails, it is possible that
uninitialized memory contents are sent unintentionally instead of user's
message in the datagram to the destination. Return with an error if
memcpy_from_msg() fails.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 0f7db23a07af ("vmci_transport: switch ->enqeue_dgram, ->enqueue_stream and ->dequeue_stream to msghdr")
Signed-off-by: Artem Chernyshev <artem.chernyshev@red-soft.ru>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/vmw_vsock/vmci_transport.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c index 842c94286d31..36eb16a40745 100644 --- a/net/vmw_vsock/vmci_transport.c +++ b/net/vmw_vsock/vmci_transport.c @@ -1711,7 +1711,11 @@ static int vmci_transport_dgram_enqueue( if (!dg) return -ENOMEM; - memcpy_from_msg(VMCI_DG_PAYLOAD(dg), msg, len); + err = memcpy_from_msg(VMCI_DG_PAYLOAD(dg), msg, len); + if (err) { + kfree(dg); + return err; + } dg->dst = vmci_make_handle(remote_addr->svm_cid, remote_addr->svm_port); |