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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id a4-20020aa780c4000000b0050dc76281d9sm7179167pfn.179.2022.05.03.18.57.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 May 2022 18:57:44 -0700 (PDT) From: Kees Cook To: "Gustavo A . R . Silva" Cc: Kees Cook , Dennis Dalessandro , Jason Gunthorpe , Leon Romanovsky , linux-rdma@vger.kernel.org, Alexei Starovoitov , alsa-devel@alsa-project.org, Al Viro , Andrew Gabbasov , Andrew Morton , Andy Gross , Andy Lavr , Arend van Spriel , Baowen Zheng , Bjorn Andersson , Boris Ostrovsky , Bradley Grove , brcm80211-dev-list.pdl@broadcom.com, Christian Brauner , =?utf-8?q?Christian_G=C3=B6ttsche?= , Christian Lamparter , Chris Zankel , Cong Wang , Daniel Axtens , Daniel Vetter , Dan Williams , David Gow , David Howells , "David S. Miller" , devicetree@vger.kernel.org, Dexuan Cui , Dmitry Kasatkin , Eli Cohen , Eric Dumazet , Eric Paris , Eugeniu Rosca , Felipe Balbi , Francis Laniel , Frank Rowand , Franky Lin , Greg Kroah-Hartman , Gregory Greenman , Guenter Roeck , Haiyang Zhang , Hante Meuleman , Herbert Xu , Hulk Robot , Jakub Kicinski , "James E.J. Bottomley" , James Morris , Jarkko Sakkinen , Jaroslav Kysela , Jens Axboe , Johan Hedberg , Johannes Berg , Johannes Berg , John Keeping , Juergen Gross , Kalle Valo , Keith Packard , keyrings@vger.kernel.org, kunit-dev@googlegroups.com, Kuniyuki Iwashima , "K. Y. Srinivasan" , Lars-Peter Clausen , Lee Jones , Liam Girdwood , linux1394-devel@lists.sourceforge.net, linux-afs@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-hardening@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-integrity@vger.kernel.org, linux-scsi@vger.kernel.org, linux-security-module@vger.kernel.org, linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, linux-xtensa@linux-xtensa.org, llvm@lists.linux.dev, Loic Poulain , Louis Peens , Luca Coelho , Luiz Augusto von Dentz , Marc Dionne , Marcel Holtmann , Mark Brown , "Martin K. Petersen" , Max Filippov , Mimi Zohar , Muchun Song , Nathan Chancellor , netdev@vger.kernel.org, Nick Desaulniers , =?utf-8?q?Nuno_S=C3=A1?= , Paolo Abeni , Paul Moore , Rich Felker , Rob Herring , Russell King , selinux@vger.kernel.org, "Serge E. Hallyn" , SHA-cyfmac-dev-list@infineon.com, Simon Horman , Stefano Stabellini , Stefan Richter , Steffen Klassert , Stephen Hemminger , Stephen Smalley , Tadeusz Struk , Takashi Iwai , Tom Rix , Udipto Goswami , Vincenzo Frascino , wcn36xx@lists.infradead.org, Wei Liu , xen-devel@lists.xenproject.org, Xiu Jianfeng , Yang Yingliang Subject: [PATCH 24/32] IB/hfi1: Use mem_to_flex_dup() for struct tid_rb_node Date: Tue, 3 May 2022 18:44:33 -0700 Message-Id: <20220504014440.3697851-25-keescook@chromium.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220504014440.3697851-1-keescook@chromium.org> References: <20220504014440.3697851-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2597; h=from:subject; bh=j5qqa5iL1lvOORaDlLtm9UR9x0OLEu0XOUmPN1O3Ohg=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBicdqGK+oIIr5PEnTJbsZIIE6wDFvul9czcGBuCOb4 OJUbtUyJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYnHahgAKCRCJcvTf3G3AJlPpD/ 0VwfEZeptxhwXvC03S8kaKbVzD8jf4H7HBP2WwjQ4ovXcZoeEPoHk43gm5ko9ZHxsEuhVYfSsNabEv KwzfkX+Be0SZ1mudTtAQCrxBnFPmMKxMszwt9mMNZtm6E/XnP2w7B2+1rA358f0MYJXzvFe7/kn3VU 5iBgnGpNGOZgXOG+jBcjTyiKQiMSXDSUp0cIXvVQpsePyQMfJGh/eu5bFCRNrwstStCte4Ow73c4Va IaWYSGyLDy4kuX78W5f19yAQR3uD4X1ryr/AVwZV0/P/jnJmz5EmCKU1qFe2YNVe7kF2+3nxmDxawo cvJJ0SuVsX0ZNg8KDkjZEG/9wBeWjiXSyoD0G6pP/WshlZoegMuvye4fFyhyKmatyVqt3t8c7FD223 F60swFGSkgfSg6J4GMTvGe3/d8QAl3MTq2ZH18n8DlcYgMk+3J2vMunZUU58h8auD6hXcni1nXgoMb GZApmHHYK5s4Fqge2j1uqJVBjHZOX3fK3YaZhKtoTqm6FUuJw+H1P3nVYfkcXshsd8t27NuIM2hLa9 jZnMgeaYhLQAUUWWjOKVskE6/+GP5gz4+qjVUI/Alev5kHFOWsbWXBC5JGCSrGBZtpMfJqMcYVqTxZ tS3tgiujwVPsRJdYvH3X2NotOyhjEtEFR8egS3/g8M+hET9UITd8x/6NqLnw== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: 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 Cc: Jason Gunthorpe Cc: Leon Romanovsky Cc: linux-rdma@vger.kernel.org Signed-off-by: Kees Cook --- 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,