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Message-Id: <20220504014440.3697851-25-keescook@chromium.org>
Date: Tue, 3 May 2022 18:44:33 -0700
From: Kees Cook <keescook@...omium.org>
To: "Gustavo A . R . Silva" <gustavoars@...nel.org>
Cc: Kees Cook <keescook@...omium.org>,
Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
Jason Gunthorpe <jgg@...pe.ca>,
Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org,
Alexei Starovoitov <ast@...nel.org>,
alsa-devel@...a-project.org, Al Viro <viro@...iv.linux.org.uk>,
Andrew Gabbasov <andrew_gabbasov@...tor.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Andy Gross <agross@...nel.org>,
Andy Lavr <andy.lavr@...il.com>,
Arend van Spriel <aspriel@...il.com>,
Baowen Zheng <baowen.zheng@...igine.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Bradley Grove <linuxdrivers@...otech.com>,
brcm80211-dev-list.pdl@...adcom.com,
Christian Brauner <brauner@...nel.org>,
Christian Göttsche <cgzones@...glemail.com>,
Christian Lamparter <chunkeey@...glemail.com>,
Chris Zankel <chris@...kel.net>,
Cong Wang <cong.wang@...edance.com>,
Daniel Axtens <dja@...ens.net>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Dan Williams <dan.j.williams@...el.com>,
David Gow <davidgow@...gle.com>,
David Howells <dhowells@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
devicetree@...r.kernel.org, Dexuan Cui <decui@...rosoft.com>,
Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
Eli Cohen <elic@...dia.com>,
Eric Dumazet <edumazet@...gle.com>,
Eric Paris <eparis@...isplace.org>,
Eugeniu Rosca <erosca@...adit-jv.com>,
Felipe Balbi <balbi@...nel.org>,
Francis Laniel <laniel_francis@...vacyrequired.com>,
Frank Rowand <frowand.list@...il.com>,
Franky Lin <franky.lin@...adcom.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Gregory Greenman <gregory.greenman@...el.com>,
Guenter Roeck <linux@...ck-us.net>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Hante Meuleman <hante.meuleman@...adcom.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
Hulk Robot <hulkci@...wei.com>,
Jakub Kicinski <kuba@...nel.org>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
James Morris <jmorris@...ei.org>,
Jarkko Sakkinen <jarkko@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>, Jens Axboe <axboe@...nel.dk>,
Johan Hedberg <johan.hedberg@...il.com>,
Johannes Berg <johannes.berg@...el.com>,
Johannes Berg <johannes@...solutions.net>,
John Keeping <john@...anate.com>,
Juergen Gross <jgross@...e.com>, Kalle Valo <kvalo@...nel.org>,
Keith Packard <keithp@...thp.com>, keyrings@...r.kernel.org,
kunit-dev@...glegroups.com,
Kuniyuki Iwashima <kuniyu@...zon.co.jp>,
"K. Y. Srinivasan" <kys@...rosoft.com>,
Lars-Peter Clausen <lars@...afoo.de>,
Lee Jones <lee.jones@...aro.org>,
Liam Girdwood <lgirdwood@...il.com>,
linux1394-devel@...ts.sourceforge.net,
linux-afs@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-arm-msm@...r.kernel.org, linux-bluetooth@...r.kernel.org,
linux-hardening@...r.kernel.org, linux-hyperv@...r.kernel.org,
linux-integrity@...r.kernel.org, linux-scsi@...r.kernel.org,
linux-security-module@...r.kernel.org, linux-usb@...r.kernel.org,
linux-wireless@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
llvm@...ts.linux.dev, Loic Poulain <loic.poulain@...aro.org>,
Louis Peens <louis.peens@...igine.com>,
Luca Coelho <luciano.coelho@...el.com>,
Luiz Augusto von Dentz <luiz.dentz@...il.com>,
Marc Dionne <marc.dionne@...istor.com>,
Marcel Holtmann <marcel@...tmann.org>,
Mark Brown <broonie@...nel.org>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Max Filippov <jcmvbkbc@...il.com>,
Mimi Zohar <zohar@...ux.ibm.com>,
Muchun Song <songmuchun@...edance.com>,
Nathan Chancellor <nathan@...nel.org>, netdev@...r.kernel.org,
Nick Desaulniers <ndesaulniers@...gle.com>,
Nuno Sá <nuno.sa@...log.com>,
Paolo Abeni <pabeni@...hat.com>,
Paul Moore <paul@...l-moore.com>,
Rich Felker <dalias@...ifal.cx>,
Rob Herring <robh+dt@...nel.org>,
Russell King <linux@...linux.org.uk>, selinux@...r.kernel.org,
"Serge E. Hallyn" <serge@...lyn.com>,
SHA-cyfmac-dev-list@...ineon.com,
Simon Horman <simon.horman@...igine.com>,
Stefano Stabellini <sstabellini@...nel.org>,
Stefan Richter <stefanr@...6.in-berlin.de>,
Steffen Klassert <steffen.klassert@...unet.com>,
Stephen Hemminger <sthemmin@...rosoft.com>,
Stephen Smalley <stephen.smalley.work@...il.com>,
Tadeusz Struk <tadeusz.struk@...aro.org>,
Takashi Iwai <tiwai@...e.com>, Tom Rix <trix@...hat.com>,
Udipto Goswami <quic_ugoswami@...cinc.com>,
Vincenzo Frascino <vincenzo.frascino@....com>,
wcn36xx@...ts.infradead.org, Wei Liu <wei.liu@...nel.org>,
xen-devel@...ts.xenproject.org,
Xiu Jianfeng <xiujianfeng@...wei.com>,
Yang Yingliang <yangyingliang@...wei.com>
Subject: [PATCH 24/32] IB/hfi1: Use mem_to_flex_dup() for struct tid_rb_node
As part of the work to perform bounds checking on all memcpy() uses,
replace the open-coded a deserialization of bytes out of memory into a
trailing flexible array by using a flex_array.h helper to perform the
allocation, bounds checking, and copying.
Cc: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Cc: Leon Romanovsky <leon@...nel.org>
Cc: linux-rdma@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
drivers/infiniband/hw/hfi1/user_exp_rcv.c | 7 ++-----
drivers/infiniband/hw/hfi1/user_exp_rcv.h | 4 ++--
2 files changed, 4 insertions(+), 7 deletions(-)
diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
index 186d30291260..f14846662ac9 100644
--- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c
+++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c
@@ -683,7 +683,7 @@ static int set_rcvarray_entry(struct hfi1_filedata *fd,
{
int ret;
struct hfi1_ctxtdata *uctxt = fd->uctxt;
- struct tid_rb_node *node;
+ struct tid_rb_node *node = NULL;
struct hfi1_devdata *dd = uctxt->dd;
dma_addr_t phys;
struct page **pages = tbuf->pages + pageidx;
@@ -692,8 +692,7 @@ static int set_rcvarray_entry(struct hfi1_filedata *fd,
* Allocate the node first so we can handle a potential
* failure before we've programmed anything.
*/
- node = kzalloc(struct_size(node, pages, npages), GFP_KERNEL);
- if (!node)
+ if (mem_to_flex_dup(&node, pages, npages, GFP_KERNEL))
return -ENOMEM;
phys = dma_map_single(&dd->pcidev->dev, __va(page_to_phys(pages[0])),
@@ -707,12 +706,10 @@ static int set_rcvarray_entry(struct hfi1_filedata *fd,
node->fdata = fd;
node->phys = page_to_phys(pages[0]);
- node->npages = npages;
node->rcventry = rcventry;
node->dma_addr = phys;
node->grp = grp;
node->freed = false;
- memcpy(node->pages, pages, flex_array_size(node, pages, npages));
if (fd->use_mn) {
ret = mmu_interval_notifier_insert(
diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.h b/drivers/infiniband/hw/hfi1/user_exp_rcv.h
index 8c53e416bf84..4be3446c4d25 100644
--- a/drivers/infiniband/hw/hfi1/user_exp_rcv.h
+++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.h
@@ -32,8 +32,8 @@ struct tid_rb_node {
u32 rcventry;
dma_addr_t dma_addr;
bool freed;
- unsigned int npages;
- struct page *pages[];
+ DECLARE_FLEX_ARRAY_ELEMENTS_COUNT(unsigned int, npages);
+ DECLARE_FLEX_ARRAY_ELEMENTS(struct page *, pages);
};
static inline int num_user_pages(unsigned long addr,
--
2.32.0
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