diff options
| author | Kees Cook <keescook@chromium.org> | 2023-10-03 18:44:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-06 10:50:34 +0100 |
| commit | 2a92fccdaca837f65990139207981014970f996c (patch) | |
| tree | 544ecd74fa94395b86b05dca0f81d7d80a30cf85 /include/net | |
| parent | cf9ecad9772554a5b78c4f31b098ed680bc5251e (diff) | |
nexthop: Annotate struct nh_group 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_group.
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: 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: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/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 8f5a2ab45920..d92046a4a078 100644 --- a/include/net/nexthop.h +++ b/include/net/nexthop.h @@ -126,7 +126,7 @@ struct nh_group { bool has_v4; struct nh_res_table __rcu *res_table; - struct nh_grp_entry nh_entries[]; + struct nh_grp_entry nh_entries[] __counted_by(num_nh); }; struct nexthop { |