| Message ID | 20210203113602.558916-1-parri.andrea@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [net] hv_netvsc: Reset the RSC count if NVSP_STAT_FAIL in netvsc_receive() | expand |
Hello: This patch was applied to netdev/net.git (refs/heads/master): On Wed, 3 Feb 2021 12:36:02 +0100 you wrote: > Commit 44144185951a0f ("hv_netvsc: Add validation for untrusted Hyper-V > values") added validation to rndis_filter_receive_data() (and > rndis_filter_receive()) which introduced NVSP_STAT_FAIL-scenarios where > the count is not updated/reset. Fix this omission, and prevent similar > scenarios from occurring in the future. > > Reported-by: Juan Vazquez <juvazq@microsoft.com> > Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> > Cc: "David S. Miller" <davem@davemloft.net> > Cc: Jakub Kicinski <kuba@kernel.org> > Cc: netdev@vger.kernel.org > Fixes: 44144185951a0f ("hv_netvsc: Add validation for untrusted Hyper-V values") > > [...] Here is the summary with links: - [net] hv_netvsc: Reset the RSC count if NVSP_STAT_FAIL in netvsc_receive() https://git.kernel.org/netdev/net/c/12bc8dfb83b5 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 2350342b961ff..13bd48a75db76 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -1262,8 +1262,11 @@ static int netvsc_receive(struct net_device *ndev, ret = rndis_filter_receive(ndev, net_device, nvchan, data, buflen); - if (unlikely(ret != NVSP_STAT_SUCCESS)) + if (unlikely(ret != NVSP_STAT_SUCCESS)) { + /* Drop incomplete packet */ + nvchan->rsc.cnt = 0; status = NVSP_STAT_FAIL; + } } enq_receive_complete(ndev, net_device, q_idx, diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 598713c0d5a87..3aab2b867fc0d 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -509,8 +509,6 @@ static int rndis_filter_receive_data(struct net_device *ndev, return ret; drop: - /* Drop incomplete packet */ - nvchan->rsc.cnt = 0; return NVSP_STAT_FAIL; }
Commit 44144185951a0f ("hv_netvsc: Add validation for untrusted Hyper-V values") added validation to rndis_filter_receive_data() (and rndis_filter_receive()) which introduced NVSP_STAT_FAIL-scenarios where the count is not updated/reset. Fix this omission, and prevent similar scenarios from occurring in the future. Reported-by: Juan Vazquez <juvazq@microsoft.com> Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: netdev@vger.kernel.org Fixes: 44144185951a0f ("hv_netvsc: Add validation for untrusted Hyper-V values") --- drivers/net/hyperv/netvsc.c | 5 ++++- drivers/net/hyperv/rndis_filter.c | 2 -- 2 files changed, 4 insertions(+), 3 deletions(-)