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Message-Id: <20230929180431.3005464-7-keescook@chromium.org> Date: Fri, 29 Sep 2023 11:04:30 -0700 From: Kees Cook <keescook@...omium.org> To: Jason Gunthorpe <jgg@...pe.ca> Cc: Kees Cook <keescook@...omium.org>, Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>, Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org, HÃ¥kon Bugge <haakon.bugge@...cle.com>, Avihai Horon <avihaih@...dia.com>, Anand Khoje <anand.a.khoje@...cle.com>, Mark Bloch <mbloch@...dia.com>, Christian Benvenuti <benve@...co.com>, Nelson Escobar <neescoba@...co.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 7/7] IB/hfi1: Annotate struct tid_rb_node 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 tid_rb_node. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci 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.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.h b/drivers/infiniband/hw/hfi1/user_exp_rcv.h index b85de9070aee..055726f7c139 100644 --- a/drivers/infiniband/hw/hfi1/user_exp_rcv.h +++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.h @@ -36,7 +36,7 @@ struct tid_rb_node { dma_addr_t dma_addr; bool freed; unsigned int npages; - struct page *pages[]; + struct page *pages[] __counted_by(npages); }; static inline int num_user_pages(unsigned long addr, -- 2.34.1
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