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| author | Kees Cook <keescook@chromium.org> | 2023-10-04 02:21:47 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-06 12:48:46 +0300 |
| commit | cf9ecad9772554a5b78c4f31b098ed680bc5251e (patch) | |
| tree | 81a5484f27db353bbeae0f59fa8490216c2dc81f | |
| parent | eaede99c3aeb38613c40a150f676f772faf2b42b (diff) | |
| download | linux-cf9ecad9772554a5b78c4f31b098ed680bc5251e.tar.xz | |
nexthop: Annotate struct nh_notifier_grp_info with __counted_by
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 nh_notifier_grp_info.
Cc: David Ahern <dsahern@kernel.org>
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: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Tom Rix <trix@redhat.com>
Cc: netdev@vger.kernel.org
Cc: llvm@lists.linux.dev
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: David Ahern <dsahern@kernel.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/nexthop.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/nexthop.h b/include/net/nexthop.h index dbd90e8fe9d6..8f5a2ab45920 100644 --- a/include/net/nexthop.h +++ b/include/net/nexthop.h @@ -187,7 +187,7 @@ struct nh_notifier_grp_entry_info { struct nh_notifier_grp_info { u16 num_nh; bool is_fdb; - struct nh_notifier_grp_entry_info nh_entries[]; + struct nh_notifier_grp_entry_info nh_entries[] __counted_by(num_nh); }; struct nh_notifier_res_bucket_info { |