From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Kees Cook <keescook@chromium.org>
Cc: netdev@vger.kernel.org,
Jesse Brandeburg <jesse.brandeburg@intel.com>,
linux-kernel@vger.kernel.org, Eric Dumazet <edumazet@google.com>,
Tony Nguyen <anthony.l.nguyen@intel.com>,
linux-hardening@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,
intel-wired-lan@lists.osuosl.org, Paolo Abeni <pabeni@redhat.com>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [Intel-wired-lan] [PATCH] net/i40e: Replace 0-length array with flexible array
Date: Fri, 6 Jan 2023 10:27:44 -0600 [thread overview]
Message-ID: <Y7hMALdQP7MC+mD7@work> (raw)
In-Reply-To: <20230105234557.never.799-kees@kernel.org>
On Thu, Jan 05, 2023 at 03:46:01PM -0800, Kees Cook 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@intel.com>
> Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
> Cc: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks!
--
Gustavo
> ---
> drivers/net/ethernet/intel/i40e/i40e.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
> index 60e351665c70..3a1c28ca5bb4 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e.h
> +++ b/drivers/net/ethernet/intel/i40e/i40e.h
> @@ -176,7 +176,7 @@ enum i40e_interrupt_policy {
>
> struct i40e_lump_tracking {
> u16 num_entries;
> - u16 list[0];
> + u16 list[];
> #define I40E_PILE_VALID_BIT 0x8000
> #define I40E_IWARP_IRQ_PILE_ID (I40E_PILE_VALID_BIT - 2)
> };
> --
> 2.34.1
>
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan@osuosl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
_______________________________________________
Intel-wired-lan mailing list
Intel-wired-lan@osuosl.org
https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
WARNING: multiple messages have this Message-ID (diff)
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Kees Cook <keescook@chromium.org>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>,
intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org,
Eric Dumazet <edumazet@google.com>,
Tony Nguyen <anthony.l.nguyen@intel.com>,
linux-hardening@vger.kernel.org, netdev@vger.kernel.org,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [Intel-wired-lan] [PATCH] net/i40e: Replace 0-length array with flexible array
Date: Fri, 6 Jan 2023 10:27:44 -0600 [thread overview]
Message-ID: <Y7hMALdQP7MC+mD7@work> (raw)
In-Reply-To: <20230105234557.never.799-kees@kernel.org>
On Thu, Jan 05, 2023 at 03:46:01PM -0800, Kees Cook 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@intel.com>
> Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
> Cc: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks!
--
Gustavo
> ---
> drivers/net/ethernet/intel/i40e/i40e.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
> index 60e351665c70..3a1c28ca5bb4 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e.h
> +++ b/drivers/net/ethernet/intel/i40e/i40e.h
> @@ -176,7 +176,7 @@ enum i40e_interrupt_policy {
>
> struct i40e_lump_tracking {
> u16 num_entries;
> - u16 list[0];
> + u16 list[];
> #define I40E_PILE_VALID_BIT 0x8000
> #define I40E_IWARP_IRQ_PILE_ID (I40E_PILE_VALID_BIT - 2)
> };
> --
> 2.34.1
>
> _______________________________________________
> Intel-wired-lan mailing list
> Intel-wired-lan@osuosl.org
> https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
next prev parent reply other threads:[~2023-01-06 16:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-05 23:46 [Intel-wired-lan] [PATCH] net/i40e: Replace 0-length array with flexible array Kees Cook
2023-01-05 23:46 ` Kees Cook
2023-01-06 16:27 ` Gustavo A. R. Silva [this message]
2023-01-06 16:27 ` [Intel-wired-lan] " Gustavo A. R. Silva
2023-01-10 16:32 ` Jiri Pirko
2023-01-10 16:32 ` Jiri Pirko
2023-01-19 9:46 ` [Intel-wired-lan] " G, GurucharanX
2023-01-19 9:46 ` G, GurucharanX
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Y7hMALdQP7MC+mD7@work \
--to=gustavoars@kernel.org \
--cc=anthony.l.nguyen@intel.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=intel-wired-lan@lists.osuosl.org \
--cc=jesse.brandeburg@intel.com \
--cc=keescook@chromium.org \
--cc=kuba@kernel.org \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.