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net: ipa: Annotate struct ipa_power 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 ipa_power.

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

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20230922172858.3822653-8-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kees Cook 2023-09-22 10:28:50 -07:00 committed by Jakub Kicinski
parent a3d7a1209b
commit 20551ee45d
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ipa/ipa_power.c
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@ -67,7 +67,7 @@ struct ipa_power {
spinlock_t spinlock; /* used with STOPPED/STARTED power flags */ spinlock_t spinlock; /* used with STOPPED/STARTED power flags */
DECLARE_BITMAP(flags, IPA_POWER_FLAG_COUNT); DECLARE_BITMAP(flags, IPA_POWER_FLAG_COUNT);
u32 interconnect_count; u32 interconnect_count;
struct icc_bulk_data interconnect[]; struct icc_bulk_data interconnect[] __counted_by(interconnect_count);
}; };
/* Initialize interconnects required for IPA operation */ /* Initialize interconnects required for IPA operation */