linux-stable/net/netlink
Kees Cook eaede99c3a netlink: Annotate struct netlink_policy_dump_state 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 netlink_policy_dump_state.

Additionally update the size of the usage array length before accessing
it. This requires remembering the old size for the memset() and later
assignments.

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: Johannes Berg <johannes.berg@intel.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>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-10-06 10:48:46 +01:00
..
af_netlink.c netlink: annotate data-races around sk->sk_err 2023-10-04 17:32:54 -07:00
af_netlink.h netlink: convert nlk->flags to atomic flags 2023-08-13 12:23:19 +01:00
diag.c netlink: convert nlk->flags to atomic flags 2023-08-13 12:23:19 +01:00
genetlink.c genetlink: add a family pointer to struct genl_info 2023-08-15 15:01:03 -07:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile netlink: add infrastructure to expose policies to userspace 2020-04-30 17:51:42 -07:00
policy.c netlink: Annotate struct netlink_policy_dump_state with __counted_by 2023-10-06 10:48:46 +01:00