Messages in this thread Patch in this message |  | | Date | Sat, 3 Dec 2022 10:56:16 +0300 | From | Artem Chernyshev <> | Subject | Re: [PATCH] net: vmw_vsock: vmci: Check memcpy_from_msg() |
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Hi, On Sat, Dec 03, 2022 at 01:17:33AM +0000, Vishnu Dasa wrote: > > > > On Dec 2, 2022, at 2:58 PM, Artem Chernyshev <artem.chernyshev@red-soft.ru> wrote: > > > > We returns from vmci_transport_dgram_enqueue() with error > > if memcpy goes wrong > > Thanks for the patch. > > Nit: could you please update the description? Maybe something like - > vmci_transport_dgram_enqueue() does not check the return value > of memcpy_from_msg(). Return with an error if the memcpy 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> > > --- > > net/vmw_vsock/vmci_transport.c | 3 ++- > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c > > index 842c94286d31..7994090e0314 100644 > > --- a/net/vmw_vsock/vmci_transport.c > > +++ b/net/vmw_vsock/vmci_transport.c > > @@ -1711,7 +1711,8 @@ static int vmci_transport_dgram_enqueue( > > if (!dg) > > return -ENOMEM; > > > > - memcpy_from_msg(VMCI_DG_PAYLOAD(dg), msg, len); > > + if (memcpy_from_msg(VMCI_DG_PAYLOAD(dg), msg, len)) > > Need to free dg using kfree() before returning. > > > + return -EFAULT; > > > > dg->dst = vmci_make_handle(remote_addr->svm_cid, > > remote_addr->svm_port); > > -- > > 2.30.3 > > >
Thanks for review. I'll fix flaws in a patch ASAP
Artem
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