| Message ID | 20230105232224.never.150-kees@kernel.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 2ab6478d1266b522a0a6ce3697914d63529f9e7a |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | mlxsw: spectrum_router: Replace 0-length array with flexible array | expand |
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.
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
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 >
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>
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!
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 };
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(-)