diff options
| author | Kees Cook <keescook@chromium.org> | 2023-09-22 10:28:44 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-10-02 11:24:52 -0700 |
| commit | 210d4e9c732fa87b584af72faae96c037d9d7957 (patch) | |
| tree | d2d33373e95d4caf00bab0c517892ed2e6616209 | |
| parent | 5b98fd5dc1e3b8446f98bc8c6e71d2585f9dcdce (diff) | |
ipv4/igmp: Annotate struct ip_sf_socklist 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 ip_sf_socklist.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Martin KaFai Lau <martin.lau@kernel.org>
Cc: Alexei Starovoitov <ast@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/20230922172858.3822653-2-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/linux/igmp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/igmp.h b/include/linux/igmp.h index ebf4349a53af..5171231f70a8 100644 --- a/include/linux/igmp.h +++ b/include/linux/igmp.h @@ -39,7 +39,7 @@ struct ip_sf_socklist { unsigned int sl_max; unsigned int sl_count; struct rcu_head rcu; - __be32 sl_addr[]; + __be32 sl_addr[] __counted_by(sl_max); }; #define IP_SFBLOCK 10 /* allocate this many at once */ |