Messages in this thread | | | Date | Sun, 17 Sep 2023 13:59:26 -0600 | Subject | Re: [PATCH v2][next] RDMA/core: Use size_{add,mul}() in calls to struct_size() | From | "Gustavo A. R. Silva" <> |
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On 9/18/23 04:49, Leon Romanovsky wrote: > On Fri, Sep 15, 2023 at 12:06:21PM -0600, Gustavo A. R. Silva wrote: >> >> >> On 9/14/23 21:29, Kees Cook wrote: >>> On Mon, Sep 11, 2023 at 05:27:59PM -0600, Gustavo A. R. Silva wrote: >>>> Harden calls to struct_size() with size_add() and size_mul(). >>> >>> Specifically, make sure that open-coded arithmetic cannot cause an >>> overflow/wraparound. (i.e. it will stay saturated at SIZE_MAX.) >> >> Yep; I have another patch where I explain this in similar terms. >> >> I'll send it, shortly. > > You missed other places with similar arithmetic. > drivers/infiniband/core/device.c: pdata_rcu = kzalloc(struct_size(pdata_rcu, pdata, > drivers/infiniband/core/device.c- rdma_end_port(device) + 1), > drivers/infiniband/core/device.c- GFP_KERNEL); > > drivers/infiniband/core/sa_query.c: sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL); > drivers/infiniband/core/user_mad.c: umad_dev = kzalloc(struct_size(umad_dev, ports, e - s + 1), GFP_KERNEL);
I haven't sent all my patches.
-- Gustavo
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