Message ID | 20231003231843.work.811-kees@kernel.org |
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State | New |
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[198.0.35.241]) by smtp.gmail.com with ESMTPSA id g2-20020a170902868200b001bde65894c8sm2155966plo.268.2023.10.03.16.18.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Oct 2023 16:18:46 -0700 (PDT) From: Kees Cook <keescook@chromium.org> To: Simon Horman <horms@kernel.org> Cc: Kees Cook <keescook@chromium.org>, Simon Horman <simon.horman@corigine.com>, Jakub Kicinski <kuba@kernel.org>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>, oss-drivers@corigine.com, netdev@vger.kernel.org, Louis Peens <louis.peens@corigine.com>, "Gustavo A. R. Silva" <gustavoars@kernel.org>, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, Tom Rix <trix@redhat.com>, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH] nfp: Annotate struct nfp_reprs with __counted_by Date: Tue, 3 Oct 2023 16:18:43 -0700 Message-Id: <20231003231843.work.811-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1385; i=keescook@chromium.org; h=from:subject:message-id; bh=GBdZ/bN+5XfvUCtrP1SCYpOVG1FCyQF4BGZ+0KiNObU=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlHKFT3XcaVjq8M5JxizadLIhdl5wOFCRk4jHmt IqwNVjEepmJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZRyhUwAKCRCJcvTf3G3A JjtdD/9D9R+8v9dgd3XY2WHug3rJjyK4+8aPw1mMYmILmQAYJrviLmccxjiM3F8I8PdZetcj6SX RbH4C+nQWdw5ItnpPFkHGDihNWS9JWqOKv+oGkwUa3Whsf7iRHBvZf7uB/OgbdEO293mVpH28xd KbDCTzrjImpUo55jjiQpypeXtqmMx9ETglaTTFwQcsy0AFJijWbvSS8agYnozYrZRQ/PImZqVtX SFpz7g3JLBAoGdtYE9fQ7jjJ03qrd+ZQrvXLw9SIaO9HFyflrYGihTFC1VCzd7kPAwollvn4m97 HH7yUiaKoVQDlXMiCxjF1SJJJ5QIFF+rmU+yQNBLg/yzGofvOSNIHLJHsBoI1WCt1cuuf0mnJaC +99noNzwMdxYbz2ty0nd3nkKAgq9GWcgxUmxwAnh6DyTzhCdCyXTQFbQdFIwQPWMkk3XZzW/MBM oi4Nl8a1A7APm4f2ShQWBNUF+X5+K4WiwWDDm02GDNhGbhd8g4SqOBl0/u8VfysAI6ItMlF6Bmr hypptMkfiJr5Kgaw9lCUFKeoF4buVYEhf6KaQp/5D+vPYIEYbR/LYJZQC4OIlgi8AOgnMELTjFx ToEkiMcod9orNCiC8N2Sp0fIEREqeIVvOYH/MV1ScmN7S/nb6gSwPSSvo5KhnEOicTn5xHj2QxY Xabvqd3 WXqLy3lg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (howler.vger.email [0.0.0.0]); Tue, 03 Oct 2023 16:19:07 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778778267305296786 X-GMAIL-MSGID: 1778778267305296786 |
Series |
nfp: Annotate struct nfp_reprs with __counted_by
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Commit Message
Kees Cook
Oct. 3, 2023, 11:18 p.m. UTC
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(-)
Comments
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); }; /**