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Message-Id: <20230929180431.3005464-3-keescook@chromium.org> Date: Fri, 29 Sep 2023 11:04:26 -0700 From: Kees Cook <keescook@...omium.org> To: Jason Gunthorpe <jgg@...pe.ca> Cc: Kees Cook <keescook@...omium.org>, Christian Benvenuti <benve@...co.com>, Nelson Escobar <neescoba@...co.com>, Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org, Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>, HÃ¥kon Bugge <haakon.bugge@...cle.com>, Avihai Horon <avihaih@...dia.com>, Anand Khoje <anand.a.khoje@...cle.com>, Mark Bloch <mbloch@...dia.com>, Bernard Metzler <bmt@...ich.ibm.com>, Bart Van Assche <bvanassche@....org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Tom Rix <trix@...hat.com>, Patrisious Haddad <phaddad@...dia.com>, Chuck Lever <chuck.lever@...cle.com>, Tom Talpey <tom@...pey.com>, wangjianli <wangjianli@...rlc.com>, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org, llvm@...ts.linux.dev Subject: [PATCH 3/7] RDMA/usnic: Annotate struct usnic_uiom_chunk with __counted_by Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct usnic_uiom_chunk. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Christian Benvenuti <benve@...co.com> Cc: Nelson Escobar <neescoba@...co.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/usnic/usnic_uiom.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.h b/drivers/infiniband/hw/usnic/usnic_uiom.h index 5a9acf941510..70d51d919d12 100644 --- a/drivers/infiniband/hw/usnic/usnic_uiom.h +++ b/drivers/infiniband/hw/usnic/usnic_uiom.h @@ -77,7 +77,7 @@ struct usnic_uiom_reg { struct usnic_uiom_chunk { struct list_head list; int nents; - struct scatterlist page_list[]; + struct scatterlist page_list[] __counted_by(nents); }; struct usnic_uiom_pd *usnic_uiom_alloc_pd(struct device *dev); -- 2.34.1
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