| Message ID | 20230915200602.never.582-kees@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: ipw2x00: Annotate struct libipw_txb with __counted_by | expand |
Kees Cook <keescook@chromium.org> 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 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 libipw_txb. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Stanislav Yakovlev <stas.yakovlev@gmail.com> > Cc: Kalle Valo <kvalo@kernel.org> > Cc: linux-wireless@vger.kernel.org > Signed-off-by: Kees Cook <keescook@chromium.org> > Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Patch applied to wireless-next.git, thanks. 357be7ebba38 wifi: ipw2x00: Annotate struct libipw_txb with __counted_by
diff --git a/drivers/net/wireless/intel/ipw2x00/libipw.h b/drivers/net/wireless/intel/ipw2x00/libipw.h index bec7bc273748..9065ca5b0208 100644 --- a/drivers/net/wireless/intel/ipw2x00/libipw.h +++ b/drivers/net/wireless/intel/ipw2x00/libipw.h @@ -488,7 +488,7 @@ struct libipw_txb { u8 reserved; u16 frag_size; u16 payload_size; - struct sk_buff *fragments[]; + struct sk_buff *fragments[] __counted_by(nr_frags); }; /* SWEEP TABLE ENTRIES NUMBER */
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 libipw_txb. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Stanislav Yakovlev <stas.yakovlev@gmail.com> Cc: Kalle Valo <kvalo@kernel.org> Cc: linux-wireless@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/net/wireless/intel/ipw2x00/libipw.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)