| Message ID | 20231003231843.work.811-kees@kernel.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 4514aa9f56fd7acf9e4f247bd38c0642e55109f7 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | nfp: Annotate struct nfp_reprs with __counted_by | expand |
On 10/4/23 01:18, Kees Cook wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for > array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct nfp_reprs. > > Cc: Simon Horman <simon.horman@corigine.com> > Cc: Jakub Kicinski <kuba@kernel.org> > Cc: "David S. Miller" <davem@davemloft.net> > Cc: Eric Dumazet <edumazet@google.com> > Cc: Paolo Abeni <pabeni@redhat.com> > Cc: oss-drivers@corigine.com > Cc: netdev@vger.kernel.org > Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] > Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Thanks -- Gustavo > --- > drivers/net/ethernet/netronome/nfp/nfp_net_repr.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h > index 48a74accbbd3..77bf4198dbde 100644 > --- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h > +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h > @@ -18,7 +18,7 @@ struct nfp_port; > */ > struct nfp_reprs { > unsigned int num_reprs; > - struct net_device __rcu *reprs[]; > + struct net_device __rcu *reprs[] __counted_by(num_reprs); > }; > > /**
On Tue, Oct 03, 2023 at 04:18:43PM -0700, Kees Cook wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for > array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct nfp_reprs. > > Cc: Simon Horman <simon.horman@corigine.com> > Cc: Jakub Kicinski <kuba@kernel.org> > Cc: "David S. Miller" <davem@davemloft.net> > Cc: Eric Dumazet <edumazet@google.com> > Cc: Paolo Abeni <pabeni@redhat.com> > Cc: oss-drivers@corigine.com > Cc: netdev@vger.kernel.org > Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] > Signed-off-by: Kees Cook <keescook@chromium.org> Thanks Kees Acked-by: Louis Peens <louis.peens@corigine.com> > --- > drivers/net/ethernet/netronome/nfp/nfp_net_repr.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h > index 48a74accbbd3..77bf4198dbde 100644 > --- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h > +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h > @@ -18,7 +18,7 @@ struct nfp_port; > */ > struct nfp_reprs { > unsigned int num_reprs; > - struct net_device __rcu *reprs[]; > + struct net_device __rcu *reprs[] __counted_by(num_reprs); > }; > > /** > -- > 2.34.1 >
Hello: This patch was applied to netdev/net-next.git (main) by Jakub Kicinski <kuba@kernel.org>: On Tue, 3 Oct 2023 16:18:43 -0700 you wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for > array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct nfp_reprs. > > [...] Here is the summary with links: - nfp: Annotate struct nfp_reprs with __counted_by https://git.kernel.org/netdev/net-next/c/4514aa9f56fd You are awesome, thank you!
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h index 48a74accbbd3..77bf4198dbde 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.h @@ -18,7 +18,7 @@ struct nfp_port; */ struct nfp_reprs { unsigned int num_reprs; - struct net_device __rcu *reprs[]; + struct net_device __rcu *reprs[] __counted_by(num_reprs); }; /**
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct nfp_reprs. Cc: Simon Horman <simon.horman@corigine.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: oss-drivers@corigine.com Cc: netdev@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/net/ethernet/netronome/nfp/nfp_net_repr.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)