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Re: [PATCH 20/32] ASoC: sigmadsp: Use mem_to_flex_dup() with struct sigmadsp_data
 
- To: Kees Cook <keescook@xxxxxxxxxxxx>
 
- From: Mark Brown <broonie@xxxxxxxxxx>
 
- Date: Wed, 4 May 2022 16:17:17 +0100
 
- Cc: "Gustavo A . R . Silva" <gustavoars@xxxxxxxxxx>,	Lars-Peter Clausen <lars@xxxxxxxxxx>,	Nuno Sá <nuno.sa@xxxxxxxxxx>,	Liam Girdwood <lgirdwood@xxxxxxxxx>,	Jaroslav Kysela <perex@xxxxxxxx>, Takashi Iwai <tiwai@xxxxxxxx>,	alsa-devel@xxxxxxxxxxxxxxxx, Alexei Starovoitov <ast@xxxxxxxxxx>,	Al Viro <viro@xxxxxxxxxxxxxxxxxx>,	Andrew Gabbasov <andrew_gabbasov@xxxxxxxxxx>,	Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>,	Andy Gross <agross@xxxxxxxxxx>, Andy Lavr <andy.lavr@xxxxxxxxx>,	Arend van Spriel <aspriel@xxxxxxxxx>,	Baowen Zheng <baowen.zheng@xxxxxxxxxxxx>,	Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>,	Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>,	Bradley Grove <linuxdrivers@xxxxxxxxxxxx>,	brcm80211-dev-list.pdl@xxxxxxxxxxxx,	Christian Brauner <brauner@xxxxxxxxxx>,	Christian Göttsche <cgzones@xxxxxxxxxxxxxx>,	Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>,	Chris Zankel <chris@xxxxxxxxxx>,	Cong Wang <cong.wang@xxxxxxxxxxxxx>, Daniel Axtens <dja@xxxxxxxxxx>,	Daniel Vetter <daniel.vetter@xxxxxxxx>,	Dan Williams <dan.j.williams@xxxxxxxxx>,	David Gow <davidgow@xxxxxxxxxx>,	David Howells <dhowells@xxxxxxxxxx>,	"David S. Miller" <davem@xxxxxxxxxxxxx>,	Dennis Dalessandro <dennis.dalessandro@xxxxxxxxxxxxxxxxxxxx>,	devicetree@xxxxxxxxxxxxxxx, Dexuan Cui <decui@xxxxxxxxxxxxx>,	Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>,	Eli Cohen <elic@xxxxxxxxxx>, Eric Dumazet <edumazet@xxxxxxxxxx>,	Eric Paris <eparis@xxxxxxxxxxxxxx>,	Eugeniu Rosca <erosca@xxxxxxxxxxxxxx>,	Felipe Balbi <balbi@xxxxxxxxxx>,	Francis Laniel <laniel_francis@xxxxxxxxxxxxxxxxxxx>,	Frank Rowand <frowand.list@xxxxxxxxx>,	Franky Lin <franky.lin@xxxxxxxxxxxx>,	Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>,	Gregory Greenman <gregory.greenman@xxxxxxxxx>,	Guenter Roeck <linux@xxxxxxxxxxxx>,	Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>,	Hante Meuleman <hante.meuleman@xxxxxxxxxxxx>,	Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>,	Hulk Robot <hulkci@xxxxxxxxxx>, Jakub Kicinski <kuba@xxxxxxxxxx>,	"James E.J. Bottomley" <jejb@xxxxxxxxxxxxx>,	James Morris <jmorris@xxxxxxxxx>,	Jarkko Sakkinen <jarkko@xxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>,	Jens Axboe <axboe@xxxxxxxxx>,	Johan Hedberg <johan.hedberg@xxxxxxxxx>,	Johannes Berg <johannes.berg@xxxxxxxxx>,	Johannes Berg <johannes@xxxxxxxxxxxxxxxx>,	John Keeping <john@xxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>,	Kalle Valo <kvalo@xxxxxxxxxx>, Keith Packard <keithp@xxxxxxxxxx>,	keyrings@xxxxxxxxxxxxxxx, kunit-dev@xxxxxxxxxxxxxxxx,	Kuniyuki Iwashima <kuniyu@xxxxxxxxxxxx>,	"K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>,	Lee Jones <lee.jones@xxxxxxxxxx>, Leon Romanovsky <leon@xxxxxxxxxx>,	linux1394-devel@xxxxxxxxxxxxxxxxxxxxx,	linux-afs@xxxxxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx,	linux-arm-msm@xxxxxxxxxxxxxxx, linux-bluetooth@xxxxxxxxxxxxxxx,	linux-hardening@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx,	linux-integrity@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx,	linux-scsi@xxxxxxxxxxxxxxx, linux-security-module@xxxxxxxxxxxxxxx,	linux-usb@xxxxxxxxxxxxxxx, linux-wireless@xxxxxxxxxxxxxxx,	linux-xtensa@xxxxxxxxxxxxxxxx, llvm@xxxxxxxxxxxxxxx,	Loic Poulain <loic.poulain@xxxxxxxxxx>,	Louis Peens <louis.peens@xxxxxxxxxxxx>,	Luca Coelho <luciano.coelho@xxxxxxxxx>,	Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx>,	Marc Dionne <marc.dionne@xxxxxxxxxxxx>,	Marcel Holtmann <marcel@xxxxxxxxxxxx>,	"Martin K. Petersen" <martin.petersen@xxxxxxxxxx>,	Max Filippov <jcmvbkbc@xxxxxxxxx>, Mimi Zohar <zohar@xxxxxxxxxxxxx>,	Muchun Song <songmuchun@xxxxxxxxxxxxx>,	Nathan Chancellor <nathan@xxxxxxxxxx>, netdev@xxxxxxxxxxxxxxx,	Nick Desaulniers <ndesaulniers@xxxxxxxxxx>,	Paolo Abeni <pabeni@xxxxxxxxxx>, Paul Moore <paul@xxxxxxxxxxxxxx>,	Rich Felker <dalias@xxxxxxxxxx>, Rob Herring <robh+dt@xxxxxxxxxx>,	Russell King <linux@xxxxxxxxxxxxxxx>, selinux@xxxxxxxxxxxxxxx,	"Serge E. Hallyn" <serge@xxxxxxxxxx>,	SHA-cyfmac-dev-list@xxxxxxxxxxxx,	Simon Horman <simon.horman@xxxxxxxxxxxx>,	Stefano Stabellini <sstabellini@xxxxxxxxxx>,	Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>,	Steffen Klassert <steffen.klassert@xxxxxxxxxxx>,	Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>,	Stephen Smalley <stephen.smalley.work@xxxxxxxxx>,	Tadeusz Struk <tadeusz.struk@xxxxxxxxxx>, Tom Rix <trix@xxxxxxxxxx>,	Udipto Goswami <quic_ugoswami@xxxxxxxxxxx>,	Vincenzo Frascino <vincenzo.frascino@xxxxxxx>,	wcn36xx@xxxxxxxxxxxxxxxxxxx, Wei Liu <wei.liu@xxxxxxxxxx>,	xen-devel@xxxxxxxxxxxxxxxxxxxx,	Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>,	Yang Yingliang <yangyingliang@xxxxxxxxxx>
 
- Delivery-date: Wed, 04 May 2022 15:34:09 +0000
 
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
 
- Mail-followup-to: Kees Cook <keescook@xxxxxxxxxxxx>,	"Gustavo A . R . Silva" <gustavoars@xxxxxxxxxx>,	Lars-Peter Clausen <lars@xxxxxxxxxx>,	Nuno Sá <nuno.sa@xxxxxxxxxx>,	Liam Girdwood <lgirdwood@xxxxxxxxx>,	Jaroslav Kysela <perex@xxxxxxxx>, Takashi Iwai <tiwai@xxxxxxxx>,	alsa-devel@xxxxxxxxxxxxxxxx, Alexei Starovoitov <ast@xxxxxxxxxx>,	Al Viro <viro@xxxxxxxxxxxxxxxxxx>,	Andrew Gabbasov <andrew_gabbasov@xxxxxxxxxx>,	Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>,	Andy Gross <agross@xxxxxxxxxx>, Andy Lavr <andy.lavr@xxxxxxxxx>,	Arend van Spriel <aspriel@xxxxxxxxx>,	Baowen Zheng <baowen.zheng@xxxxxxxxxxxx>,	Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>,	Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>,	Bradley Grove <linuxdrivers@xxxxxxxxxxxx>,	brcm80211-dev-list.pdl@xxxxxxxxxxxx,	Christian Brauner <brauner@xxxxxxxxxx>,	Christian Göttsche <cgzones@xxxxxxxxxxxxxx>,	Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>,	Chris Zankel <chris@xxxxxxxxxx>,	Cong Wang <cong.wang@xxxxxxxxxxxxx>, Daniel Axtens <dja@xxxxxxxxxx>,	Daniel Vetter <daniel.vetter@xxxxxxxx>,	Dan Williams <dan.j.williams@xxxxxxxxx>,	David Gow <davidgow@xxxxxxxxxx>,	David Howells <dhowells@xxxxxxxxxx>,	"David S. Miller" <davem@xxxxxxxxxxxxx>,	Dennis Dalessandro <dennis.dalessandro@xxxxxxxxxxxxxxxxxxxx>,	devicetree@xxxxxxxxxxxxxxx, Dexuan Cui <decui@xxxxxxxxxxxxx>,	Dmitry Kasatkin <dmitry.kasatkin@xxxxxxxxx>,	Eli Cohen <elic@xxxxxxxxxx>, Eric Dumazet <edumazet@xxxxxxxxxx>,	Eric Paris <eparis@xxxxxxxxxxxxxx>,	Eugeniu Rosca <erosca@xxxxxxxxxxxxxx>,	Felipe Balbi <balbi@xxxxxxxxxx>,	Francis Laniel <laniel_francis@xxxxxxxxxxxxxxxxxxx>,	Frank Rowand <frowand.list@xxxxxxxxx>,	Franky Lin <franky.lin@xxxxxxxxxxxx>,	Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>,	Gregory Greenman <gregory.greenman@xxxxxxxxx>,	Guenter Roeck <linux@xxxxxxxxxxxx>,	Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>,	Hante Meuleman <hante.meuleman@xxxxxxxxxxxx>,	Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>,	Hulk Robot <hulkci@xxxxxxxxxx>, Jakub Kicinski <kuba@xxxxxxxxxx>,	"James E.J. Bottomley" <jejb@xxxxxxxxxxxxx>,	James Morris <jmorris@xxxxxxxxx>,	Jarkko Sakkinen <jarkko@xxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>,	Jens Axboe <axboe@xxxxxxxxx>,	Johan Hedberg <johan.hedberg@xxxxxxxxx>,	Johannes Berg <johannes.berg@xxxxxxxxx>,	Johannes Berg <johannes@xxxxxxxxxxxxxxxx>,	John Keeping <john@xxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>,	Kalle Valo <kvalo@xxxxxxxxxx>, Keith Packard <keithp@xxxxxxxxxx>,	keyrings@xxxxxxxxxxxxxxx, kunit-dev@xxxxxxxxxxxxxxxx,	Kuniyuki Iwashima <kuniyu@xxxxxxxxxxxx>,	"K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>,	Lee Jones <lee.jones@xxxxxxxxxx>, Leon Romanovsky <leon@xxxxxxxxxx>,	linux1394-devel@xxxxxxxxxxxxxxxxxxxxx,	linux-afs@xxxxxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx,	linux-arm-msm@xxxxxxxxxxxxxxx, linux-bluetooth@xxxxxxxxxxxxxxx,	linux-hardening@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx,	linux-integrity@xxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx,	linux-scsi@xxxxxxxxxxxxxxx, linux-security-module@xxxxxxxxxxxxxxx,	linux-usb@xxxxxxxxxxxxxxx, linux-wireless@xxxxxxxxxxxxxxx,	linux-xtensa@xxxxxxxxxxxxxxxx, llvm@xxxxxxxxxxxxxxx,	Loic Poulain <loic.poulain@xxxxxxxxxx>,	Louis Peens <louis.peens@xxxxxxxxxxxx>,	Luca Coelho <luciano.coelho@xxxxxxxxx>,	Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx>,	Marc Dionne <marc.dionne@xxxxxxxxxxxx>,	Marcel Holtmann <marcel@xxxxxxxxxxxx>,	"Martin K. Petersen" <martin.petersen@xxxxxxxxxx>,	Max Filippov <jcmvbkbc@xxxxxxxxx>, Mimi Zohar <zohar@xxxxxxxxxxxxx>,	Muchun Song <songmuchun@xxxxxxxxxxxxx>,	Nathan Chancellor <nathan@xxxxxxxxxx>, netdev@xxxxxxxxxxxxxxx,	Nick Desaulniers <ndesaulniers@xxxxxxxxxx>,	Paolo Abeni <pabeni@xxxxxxxxxx>, Paul Moore <paul@xxxxxxxxxxxxxx>,	Rich Felker <dalias@xxxxxxxxxx>, Rob Herring <robh+dt@xxxxxxxxxx>,	Russell King <linux@xxxxxxxxxxxxxxx>, selinux@xxxxxxxxxxxxxxx,	"Serge E. Hallyn" <serge@xxxxxxxxxx>,	SHA-cyfmac-dev-list@xxxxxxxxxxxx,	Simon Horman <simon.horman@xxxxxxxxxxxx>,	Stefano Stabellini <sstabellini@xxxxxxxxxx>,	Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>,	Steffen Klassert <steffen.klassert@xxxxxxxxxxx>,	Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>,	Stephen Smalley <stephen.smalley.work@xxxxxxxxx>,	Tadeusz Struk <tadeusz.struk@xxxxxxxxxx>, Tom Rix <trix@xxxxxxxxxx>,	Udipto Goswami <quic_ugoswami@xxxxxxxxxxx>,	Vincenzo Frascino <vincenzo.frascino@xxxxxxx>,	wcn36xx@xxxxxxxxxxxxxxxxxxx, Wei Liu <wei.liu@xxxxxxxxxx>,	xen-devel@xxxxxxxxxxxxxxxxxxxx,	Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>,	Yang Yingliang <yangyingliang@xxxxxxxxxx>
 
 
 
On Tue, May 03, 2022 at 06:44:29PM -0700, Kees Cook wrote:
> 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.
Acked-by: Mark Brown <broonie@xxxxxxxxxx>
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