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net: hns: Annotate struct ppe_common_cb with __counted_by

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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 ppe_common_cb.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922172858.3822653-4-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kees Cook 2023-09-22 10:28:46 -07:00 committed by Jakub Kicinski
parent 5d22b65280
commit 5b829c8460
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.h
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@ -92,7 +92,7 @@ struct ppe_common_cb {
u8 comm_index; /*ppe_common index*/
u32 ppe_num;
struct hns_ppe_cb ppe_cb[];
struct hns_ppe_cb ppe_cb[] __counted_by(ppe_num);
};