diff options
| author | Kees Cook <keescook@chromium.org> | 2023-09-22 10:28:43 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-10-02 11:24:51 -0700 |
| commit | 5b98fd5dc1e3b8446f98bc8c6e71d2585f9dcdce (patch) | |
| tree | 1d79f97b43220f7cf094f7e09681d22ae78ca667 | |
| parent | 436e5f758d6fbc2c5903d59f2cf9bb753ec77d9e (diff) | |
ipv4: Annotate struct fib_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 checking 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 fib_info.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: David Ahern <dsahern@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922172858.3822653-1-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/net/ip_fib.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h index f0c13864180e..84b0a82c9df4 100644 --- a/include/net/ip_fib.h +++ b/include/net/ip_fib.h @@ -156,7 +156,7 @@ struct fib_info { bool nh_updated; struct nexthop *nh; struct rcu_head rcu; - struct fib_nh fib_nh[]; + struct fib_nh fib_nh[] __counted_by(fib_nhs); }; |