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| author | Nikolay Kuratov <kniv@yandex-team.ru> | 2023-12-11 19:23:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-20 17:32:34 +0300 |
| commit | ad2ecbdc29909424cc34b7383faf8a7c7585cf52 (patch) | |
| tree | 8dff425e0d2df87107287849edec49f0f8cfe9df | |
| parent | 1a455a1ddb0b77a6118f001f1d397bd2edc87e06 (diff) | |
| download | linux-ad2ecbdc29909424cc34b7383faf8a7c7585cf52.tar.xz | |
vsock/virtio: Fix unsigned integer wrap around in virtio_transport_has_space()
[ Upstream commit 60316d7f10b17a7ebb1ead0642fee8710e1560e0 ]
We need to do signed arithmetic if we expect condition
`if (bytes < 0)` to be possible
Found by Linux Verification Center (linuxtesting.org) with SVACE
Fixes: 06a8fc78367d ("VSOCK: Introduce virtio_vsock_common.ko")
Signed-off-by: Nikolay Kuratov <kniv@yandex-team.ru>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20231211162317.4116625-1-kniv@yandex-team.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/vmw_vsock/virtio_transport_common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c index 9b8f592897ec..df09ac4e3505 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -348,7 +348,7 @@ static s64 virtio_transport_has_space(struct vsock_sock *vsk) struct virtio_vsock_sock *vvs = vsk->trans; s64 bytes; - bytes = vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt); + bytes = (s64)vvs->peer_buf_alloc - (vvs->tx_cnt - vvs->peer_fwd_cnt); if (bytes < 0) bytes = 0; |