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Message-ID: <Y72TBSH/QnJhnYIx@nanopsycho> Date: Tue, 10 Jan 2023 17:32:05 +0100 From: Jiri Pirko <jiri@...nulli.us> To: Kees Cook <keescook@...omium.org> Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>, Tony Nguyen <anthony.l.nguyen@...el.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org Subject: Re: [PATCH] net/i40e: Replace 0-length array with flexible array Fri, Jan 06, 2023 at 12:46:01AM CET, keescook@...omium.org wrote: >Zero-length arrays are deprecated[1]. Replace struct i40e_lump_tracking's >"list" 0-length array with a flexible array. Detected with GCC 13, >using -fstrict-flex-arrays=3: > >In function 'i40e_put_lump', > inlined from 'i40e_clear_interrupt_scheme' at drivers/net/ethernet/intel/i40e/i40e_main.c:5145:2: >drivers/net/ethernet/intel/i40e/i40e_main.c:278:27: warning: array subscript <unknown> is outside array bounds of 'u16[0]' {aka 'short unsigned int[]'} [-Warray-bounds=] > 278 | pile->list[i] = 0; > | ~~~~~~~~~~^~~ >drivers/net/ethernet/intel/i40e/i40e.h: In function 'i40e_clear_interrupt_scheme': >drivers/net/ethernet/intel/i40e/i40e.h:179:13: note: while referencing 'list' > 179 | u16 list[0]; > | ^~~~ > >[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays > >Cc: Jesse Brandeburg <jesse.brandeburg@...el.com> >Cc: Tony Nguyen <anthony.l.nguyen@...el.com> >Cc: "David S. Miller" <davem@...emloft.net> >Cc: Eric Dumazet <edumazet@...gle.com> >Cc: Jakub Kicinski <kuba@...nel.org> >Cc: Paolo Abeni <pabeni@...hat.com> >Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org> >Cc: intel-wired-lan@...ts.osuosl.org >Cc: netdev@...r.kernel.org >Signed-off-by: Kees Cook <keescook@...omium.org> Reviewed-by: Jiri Pirko <jiri@...dia.com>
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