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cxgb4: Annotate struct smt_data 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 smt_data.

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

Cc: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230929181149.3006432-5-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kees Cook 2023-09-29 11:11:49 -07:00 committed by Jakub Kicinski
parent ceba9725fb
commit 1508cb7e07
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/chelsio/cxgb4/smt.h
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@ -66,7 +66,7 @@ struct smt_entry {
struct smt_data { struct smt_data {
unsigned int smt_size; unsigned int smt_size;
rwlock_t lock; rwlock_t lock;
struct smt_entry smtab[]; struct smt_entry smtab[] __counted_by(smt_size);
}; };
struct smt_data *t4_init_smt(void); struct smt_data *t4_init_smt(void);