On 10/4/23 01:25, Kees Cook wrote:
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 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 nvmet_fc_tgt_queue.
Cc: James Smart <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Sagi Grimberg <[email protected]>
Cc: Chaitanya Kulkarni <[email protected]>
Cc: [email protected]
Link:
https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
[1]
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Gustavo A. R. Silva <[email protected]>
Thanks
--
Gustavo
---
drivers/nvme/target/fc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index 1ab6601fdd5c..0fa2d658cdeb 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -146,7 +146,7 @@ struct nvmet_fc_tgt_queue {
struct workqueue_struct *work_q;
struct kref ref;
struct rcu_head rcu;
- struct nvmet_fc_fcp_iod fod[]; /* array of fcp_iods */
+ struct nvmet_fc_fcp_iod fod[] __counted_by(sqsize); /* array of
fcp_iods */
} __aligned(sizeof(unsigned long long));
struct nvmet_fc_hostport {
