Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH 08/14] net: ipa: Annotate struct ipa_power with __counted_by | Date | Fri, 22 Sep 2023 10:28:50 -0700 |
| |
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
Cc: Alex Elder <elder@kernel.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/net/ipa/ipa_power.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ipa/ipa_power.c b/drivers/net/ipa/ipa_power.c index 0eaa7a7f3343..e223886123ce 100644 --- a/drivers/net/ipa/ipa_power.c +++ b/drivers/net/ipa/ipa_power.c @@ -67,7 +67,7 @@ struct ipa_power { spinlock_t spinlock; /* used with STOPPED/STARTED power flags */ DECLARE_BITMAP(flags, IPA_POWER_FLAG_COUNT); u32 interconnect_count; - struct icc_bulk_data interconnect[]; + struct icc_bulk_data interconnect[] __counted_by(interconnect_count); }; /* Initialize interconnects required for IPA operation */ -- 2.34.1
| |