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RDMA: Annotate struct rdma_hw_stats 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 rdma_hw_stats.

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

Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: linux-rdma@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230929180431.3005464-1-keescook@chromium.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Kees Cook 2023-09-29 11:04:24 -07:00 committed by Leon Romanovsky
parent c9813b0b99
commit 4755dc6f29
1 changed files with 1 additions and 1 deletions
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2
include/rdma/ib_verbs.h
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@ -608,7 +608,7 @@ struct rdma_hw_stats {
const struct rdma_stat_desc *descs;
unsigned long *is_disabled;
int num_counters;
u64 value[];
u64 value[] __counted_by(num_counters);
};
#define RDMA_HW_STATS_DEFAULT_LIFESPAN 10