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| author | Andres Beltran <lkmlabelt@gmail.com> | 2020-11-09 11:04:02 +0100 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2020-11-17 10:54:18 +0000 |
| commit | 4d18fcc95f50950a99bd940d4e61a983f91d267a (patch) | |
| tree | 1833ae5107119605a1fba4f6580e35653a1e6a82 /include/linux/hyperv.h | |
| parent | 453de21c2b8281228173a7b689120b92929743d6 (diff) | |
| download | lwn-4d18fcc95f50950a99bd940d4e61a983f91d267a.tar.gz lwn-4d18fcc95f50950a99bd940d4e61a983f91d267a.zip | |
hv_netvsc: Use vmbus_requestor to generate transaction IDs for VMBus hardening
Currently, pointers to guest memory are passed to Hyper-V as
transaction IDs in netvsc. In the face of errors or malicious
behavior in Hyper-V, netvsc should not expose or trust the transaction
IDs returned by Hyper-V to be valid guest memory addresses. Instead,
use small integers generated by vmbus_requestor as requests
(transaction) IDs.
Signed-off-by: Andres Beltran <lkmlabelt@gmail.com>
Co-developed-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Link: https://lore.kernel.org/r/20201109100402.8946-4-parri.andrea@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'include/linux/hyperv.h')
| -rw-r--r-- | include/linux/hyperv.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index 5b6d5c4e3711..5ddb479c4d4c 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -779,6 +779,7 @@ struct vmbus_requestor { #define VMBUS_NO_RQSTOR U64_MAX #define VMBUS_RQST_ERROR (U64_MAX - 1) +#define VMBUS_RQST_ID_NO_RESPONSE (U64_MAX - 2) struct vmbus_device { u16 dev_type; |