linux-hardening - Re: [PATCH v3] net: macb: Add __nonstring annotations for unterminated strings

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Message-Id: 
 <174240963487.1149743.12928700103940851464.git-patchwork-notify@kernel.org>
Date: Wed, 19 Mar 2025 18:40:34 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Kees Cook <kees@...nel.org>
Cc: nicolas.ferre@...rochip.com, claudiu.beznea@...on.dev,
 andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3] net: macb: Add __nonstring annotations for unterminated
 strings

Hello:

This patch was applied to netdev/net-next.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Wed, 12 Mar 2025 13:07:01 -0700 you wrote:
> When a character array without a terminating NUL character has a static
> initializer, GCC 15's -Wunterminated-string-initialization will only
> warn if the array lacks the "nonstring" attribute[1]. Mark the arrays
> with __nonstring to correctly identify the char array as "not a C string"
> and thereby eliminate the warning:
> 
> In file included from ../drivers/net/ethernet/cadence/macb_main.c:42:
> ../drivers/net/ethernet/cadence/macb.h:1070:35: warning: initializer-string for array of 'char' truncates NUL terminator but destination lacks 'nonstring' attribute (33 chars into 32 available) [-Wunterminated-string-initialization]
>  1070 |         GEM_STAT_TITLE(TX1519CNT, "tx_greater_than_1518_byte_frames"),
>       |                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ../drivers/net/ethernet/cadence/macb.h:1050:24: note: in definition of macro 'GEM_STAT_TITLE_BITS'
>  1050 |         .stat_string = title,                           \
>       |                        ^~~~~
> ../drivers/net/ethernet/cadence/macb.h:1070:9: note: in expansion of macro 'GEM_STAT_TITLE'
>  1070 |         GEM_STAT_TITLE(TX1519CNT, "tx_greater_than_1518_byte_frames"),
>       |         ^~~~~~~~~~~~~~
> ../drivers/net/ethernet/cadence/macb.h:1097:35: warning: initializer-string for array of 'char' truncates NUL terminator but destination lacks 'nonstring' attribute (33 chars into 32 available) [-Wunterminated-string-initialization]
>  1097 |         GEM_STAT_TITLE(RX1519CNT, "rx_greater_than_1518_byte_frames"),
>       |                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ../drivers/net/ethernet/cadence/macb.h:1050:24: note: in definition of macro 'GEM_STAT_TITLE_BITS'
>  1050 |         .stat_string = title,                           \
>       |                        ^~~~~
> ../drivers/net/ethernet/cadence/macb.h:1097:9: note: in expansion of macro 'GEM_STAT_TITLE'
>  1097 |         GEM_STAT_TITLE(RX1519CNT, "rx_greater_than_1518_byte_frames"),
>       |         ^~~~~~~~~~~~~~
> 
> [...]

Here is the summary with links:
  - [v3] net: macb: Add __nonstring annotations for unterminated strings
    https://git.kernel.org/netdev/net-next/c/3d97da0ee625

You are awesome, thank you!
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