* [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array
@ 2023-01-05 23:22 Kees Cook
2023-01-06 10:02 ` Petr Machata
` (3 more replies)
0 siblings, 4 replies; 6+ messages in thread
From: Kees Cook @ 2023-01-05 23:22 UTC (permalink / raw)
To: Ido Schimmel
Cc: Kees Cook, Petr Machata, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Gustavo A. R. Silva, netdev,
linux-kernel, linux-hardening
Zero-length arrays are deprecated[1]. Replace struct
mlxsw_sp_nexthop_group_info's "nexthops" 0-length array with a flexible
array. Detected with GCC 13, using -fstrict-flex-arrays=3:
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c: In function 'mlxsw_sp_nexthop_group_hash_obj':
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:3278:38: warning: array subscript i is outside array bounds of 'struct mlxsw_sp_nexthop[0]' [-Warray-bounds=]
3278 | val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
| ^~~~~~~~~~~~
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:2954:33: note: while referencing 'nexthops'
2954 | struct mlxsw_sp_nexthop nexthops[0];
| ^~~~~~~~
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays
Cc: Ido Schimmel <idosch@nvidia.com>
Cc: Petr Machata <petrm@nvidia.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: netdev@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index c22c3ac4e2a1..09e32778b012 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -2951,7 +2951,7 @@ struct mlxsw_sp_nexthop_group_info {
gateway:1, /* routes using the group use a gateway */
is_resilient:1;
struct list_head list; /* member in nh_res_grp_list */
- struct mlxsw_sp_nexthop nexthops[0];
+ struct mlxsw_sp_nexthop nexthops[];
#define nh_rif nexthops[0].rif
};
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array
2023-01-05 23:22 [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array Kees Cook
@ 2023-01-06 10:02 ` Petr Machata
2023-01-07 22:44 ` Petr Machata
2023-01-06 10:10 ` Ido Schimmel
` (2 subsequent siblings)
3 siblings, 1 reply; 6+ messages in thread
From: Petr Machata @ 2023-01-06 10:02 UTC (permalink / raw)
To: Kees Cook
Cc: Ido Schimmel, Petr Machata, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Gustavo A. R. Silva, netdev,
linux-kernel, linux-hardening
Kees Cook <keescook@chromium.org> writes:
> Zero-length arrays are deprecated[1]. Replace struct
> mlxsw_sp_nexthop_group_info's "nexthops" 0-length array with a flexible
> array. Detected with GCC 13, using -fstrict-flex-arrays=3:
>
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c: In function 'mlxsw_sp_nexthop_group_hash_obj':
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:3278:38: warning: array subscript i is outside array bounds of 'struct mlxsw_sp_nexthop[0]' [-Warray-bounds=]
> 3278 | val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
> | ^~~~~~~~~~~~
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:2954:33: note: while referencing 'nexthops'
> 2954 | struct mlxsw_sp_nexthop nexthops[0];
> | ^~~~~~~~
>
> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays
>
> Cc: Ido Schimmel <idosch@nvidia.com>
> Cc: Petr Machata <petrm@nvidia.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: netdev@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> index c22c3ac4e2a1..09e32778b012 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> @@ -2951,7 +2951,7 @@ struct mlxsw_sp_nexthop_group_info {
> gateway:1, /* routes using the group use a gateway */
> is_resilient:1;
> struct list_head list; /* member in nh_res_grp_list */
> - struct mlxsw_sp_nexthop nexthops[0];
> + struct mlxsw_sp_nexthop nexthops[];
> #define nh_rif nexthops[0].rif
> };
Thanks. I'll pass this through our nightly and report back.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array
2023-01-05 23:22 [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array Kees Cook
2023-01-06 10:02 ` Petr Machata
@ 2023-01-06 10:10 ` Ido Schimmel
2023-01-06 16:12 ` Gustavo A. R. Silva
2023-01-09 7:40 ` patchwork-bot+netdevbpf
3 siblings, 0 replies; 6+ messages in thread
From: Ido Schimmel @ 2023-01-06 10:10 UTC (permalink / raw)
To: Kees Cook
Cc: Petr Machata, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Gustavo A. R. Silva, netdev, linux-kernel,
linux-hardening
On Thu, Jan 05, 2023 at 03:22:29PM -0800, Kees Cook wrote:
> Zero-length arrays are deprecated[1]. Replace struct
> mlxsw_sp_nexthop_group_info's "nexthops" 0-length array with a flexible
> array. Detected with GCC 13, using -fstrict-flex-arrays=3:
>
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c: In function 'mlxsw_sp_nexthop_group_hash_obj':
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:3278:38: warning: array subscript i is outside array bounds of 'struct mlxsw_sp_nexthop[0]' [-Warray-bounds=]
> 3278 | val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
> | ^~~~~~~~~~~~
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:2954:33: note: while referencing 'nexthops'
> 2954 | struct mlxsw_sp_nexthop nexthops[0];
> | ^~~~~~~~
>
> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays
>
> Cc: Ido Schimmel <idosch@nvidia.com>
> Cc: Petr Machata <petrm@nvidia.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: netdev@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Thanks
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array
2023-01-05 23:22 [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array Kees Cook
2023-01-06 10:02 ` Petr Machata
2023-01-06 10:10 ` Ido Schimmel
@ 2023-01-06 16:12 ` Gustavo A. R. Silva
2023-01-09 7:40 ` patchwork-bot+netdevbpf
3 siblings, 0 replies; 6+ messages in thread
From: Gustavo A. R. Silva @ 2023-01-06 16:12 UTC (permalink / raw)
To: Kees Cook
Cc: Ido Schimmel, Petr Machata, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, netdev, linux-kernel,
linux-hardening
On Thu, Jan 05, 2023 at 03:22:29PM -0800, Kees Cook wrote:
> Zero-length arrays are deprecated[1]. Replace struct
> mlxsw_sp_nexthop_group_info's "nexthops" 0-length array with a flexible
> array. Detected with GCC 13, using -fstrict-flex-arrays=3:
>
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c: In function 'mlxsw_sp_nexthop_group_hash_obj':
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:3278:38: warning: array subscript i is outside array bounds of 'struct mlxsw_sp_nexthop[0]' [-Warray-bounds=]
> 3278 | val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
> | ^~~~~~~~~~~~
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:2954:33: note: while referencing 'nexthops'
> 2954 | struct mlxsw_sp_nexthop nexthops[0];
> | ^~~~~~~~
>
> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays
>
> Cc: Ido Schimmel <idosch@nvidia.com>
> Cc: Petr Machata <petrm@nvidia.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: 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/mellanox/mlxsw/spectrum_router.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> index c22c3ac4e2a1..09e32778b012 100644
> --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
> @@ -2951,7 +2951,7 @@ struct mlxsw_sp_nexthop_group_info {
> gateway:1, /* routes using the group use a gateway */
> is_resilient:1;
> struct list_head list; /* member in nh_res_grp_list */
> - struct mlxsw_sp_nexthop nexthops[0];
> + struct mlxsw_sp_nexthop nexthops[];
> #define nh_rif nexthops[0].rif
> };
>
> --
> 2.34.1
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array
2023-01-06 10:02 ` Petr Machata
@ 2023-01-07 22:44 ` Petr Machata
0 siblings, 0 replies; 6+ messages in thread
From: Petr Machata @ 2023-01-07 22:44 UTC (permalink / raw)
To: Petr Machata
Cc: Kees Cook, Ido Schimmel, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Gustavo A. R. Silva, netdev,
linux-kernel, linux-hardening
Petr Machata <petrm@nvidia.com> writes:
> Kees Cook <keescook@chromium.org> writes:
>
>> Zero-length arrays are deprecated[1]. Replace struct
>> mlxsw_sp_nexthop_group_info's "nexthops" 0-length array with a flexible
>> array.
[...]
> Thanks. I'll pass this through our nightly and report back.
Looking good.
Tested-by: Petr Machata <petrm@nvidia.com>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array
2023-01-05 23:22 [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array Kees Cook
` (2 preceding siblings ...)
2023-01-06 16:12 ` Gustavo A. R. Silva
@ 2023-01-09 7:40 ` patchwork-bot+netdevbpf
3 siblings, 0 replies; 6+ messages in thread
From: patchwork-bot+netdevbpf @ 2023-01-09 7:40 UTC (permalink / raw)
To: Kees Cook
Cc: idosch, petrm, davem, edumazet, kuba, pabeni, gustavoars, netdev,
linux-kernel, linux-hardening
Hello:
This patch was applied to netdev/net.git (master)
by David S. Miller <davem@davemloft.net>:
On Thu, 5 Jan 2023 15:22:29 -0800 you wrote:
> Zero-length arrays are deprecated[1]. Replace struct
> mlxsw_sp_nexthop_group_info's "nexthops" 0-length array with a flexible
> array. Detected with GCC 13, using -fstrict-flex-arrays=3:
>
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c: In function 'mlxsw_sp_nexthop_group_hash_obj':
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:3278:38: warning: array subscript i is outside array bounds of 'struct mlxsw_sp_nexthop[0]' [-Warray-bounds=]
> 3278 | val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed);
> | ^~~~~~~~~~~~
> drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:2954:33: note: while referencing 'nexthops'
> 2954 | struct mlxsw_sp_nexthop nexthops[0];
> | ^~~~~~~~
>
> [...]
Here is the summary with links:
- mlxsw: spectrum_router: Replace 0-length array with flexible array
https://git.kernel.org/netdev/net/c/2ab6478d1266
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 6+ messages in thread
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2023-01-05 23:22 [PATCH] mlxsw: spectrum_router: Replace 0-length array with flexible array Kees Cook
2023-01-06 10:02 ` Petr Machata
2023-01-07 22:44 ` Petr Machata
2023-01-06 10:10 ` Ido Schimmel
2023-01-06 16:12 ` Gustavo A. R. Silva
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