Commit 1508cb7e authored by Kees Cook's avatar Kees Cook Committed by Jakub Kicinski
Browse files

cxgb4: Annotate struct smt_data 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 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: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230929181149.3006432-5-keescook@chromium.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent ceba9725

drivers/net/ethernet/chelsio/cxgb4/smt.h

+1 −1
Original line number Diff line number Diff line
@@ -66,7 +66,7 @@ struct smt_entry { 
struct smt_data {

	unsigned int smt_size;

	rwlock_t lock;

	struct smt_entry smtab[];

	struct smt_entry smtab[] __counted_by(smt_size);

};



struct smt_data *t4_init_smt(void);