From: Jason Gunthorpe <jgg@ziepe.ca>
To: Bernard Metzler <BMT@zurich.ibm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
Doug Ledford <dledford@redhat.com>,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Re: [PATCH] RDMA/siw: Fix compiler warnings on 32-bit due to u64/pointer abuse
Date: Mon, 19 Aug 2019 10:52:13 -0300 [thread overview]
Message-ID: <20190819135213.GF5058@ziepe.ca> (raw)
In-Reply-To: <OF7DB4AD51.C58B8A8B-ON0025845B.004A0CF6-0025845B.004AB95C@notes.na.collabserv.com>
On Mon, Aug 19, 2019 at 01:36:11PM +0000, Bernard Metzler wrote:
> >If the value is really a kernel pointer, then it ought to be printed
> >with %p. We have been getting demanding on this point lately in RDMA
> >to enforce the ability to keep kernel pointers secret.
> >
> >> - wqe->sqe.sge[0].laddr = (u64)&wqe->sqe.sge[1];
> >> + wqe->sqe.sge[0].laddr = (uintptr_t)&wqe->sqe.sge[1];
> >
> >[..]
> >
> >> rv = siw_rx_kva(srx,
> >> - (void *)(sge->laddr + frx->sge_off),
> >> + (void *)(uintptr_t)(sge->laddr + frx->sge_off),
> >> sge_bytes);
> >
> >Bernard, this is nonsense, what is going on here with sge->laddr that
> >it can't be a void *?
> >
> siw_sge is defined in siw-abi.h. We make the address u64 to keep the ABI
> arch independent.
Eh? How does the siw-abi.h store a kernel pointer? Sounds like kernel
and user types are being mixed.
Jason
next prev parent reply other threads:[~2019-08-19 13:52 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-19 10:05 [PATCH] RDMA/siw: Fix compiler warnings on 32-bit due to u64/pointer abuse Geert Uytterhoeven
2019-08-19 12:24 ` Jason Gunthorpe
2019-08-19 13:36 ` Bernard Metzler
2019-08-19 13:52 ` Jason Gunthorpe [this message]
2019-08-19 14:15 ` Bernard Metzler
2019-08-19 14:18 ` Jason Gunthorpe
2019-08-19 14:52 ` Bernard Metzler
2019-08-19 15:07 ` Jason Gunthorpe
2019-08-19 15:54 ` Bernard Metzler
2019-08-19 16:05 ` Jason Gunthorpe
2019-08-19 16:29 ` Bernard Metzler
2019-08-19 16:35 ` Jason Gunthorpe
2019-08-19 17:39 ` Bernard Metzler
2019-08-19 18:00 ` Jason Gunthorpe
2019-08-19 21:40 ` Bernard Metzler
2019-08-19 22:22 ` Jason Gunthorpe
2019-08-19 16:56 ` Joe Perches
2019-08-19 17:14 ` Geert Uytterhoeven
2019-08-27 14:17 ` David Laight
2019-08-27 17:29 ` Geert Uytterhoeven
2019-08-27 17:46 ` Al Viro
2019-08-27 17:59 ` Geert Uytterhoeven
2019-08-27 18:33 ` Joe Perches
2019-08-28 8:27 ` David Laight
2019-08-19 17:26 ` Bernard Metzler
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