| Message ID | 20230817211531.4193219-2-keescook@chromium.org |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: cfg80211: Annotate with __counted_by | expand |
On 8/17/23 15:15, 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 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 cfg80211_cqm_config. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Johannes Berg <johannes@sipsolutions.net> > 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: linux-wireless@vger.kernel.org > Cc: netdev@vger.kernel.org > Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Thanks -- Gustavo > --- > net/wireless/core.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/wireless/core.h b/net/wireless/core.h > index 8a807b609ef7..507d184b8b40 100644 > --- a/net/wireless/core.h > +++ b/net/wireless/core.h > @@ -298,7 +298,7 @@ struct cfg80211_cqm_config { > u32 rssi_hyst; > s32 last_rssi_event_value; > int n_rssi_thresholds; > - s32 rssi_thresholds[]; > + s32 rssi_thresholds[] __counted_by(n_rssi_thresholds); > }; > > void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
diff --git a/net/wireless/core.h b/net/wireless/core.h index 8a807b609ef7..507d184b8b40 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -298,7 +298,7 @@ struct cfg80211_cqm_config { u32 rssi_hyst; s32 last_rssi_event_value; int n_rssi_thresholds; - s32 rssi_thresholds[]; + s32 rssi_thresholds[] __counted_by(n_rssi_thresholds); }; void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev);
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 cfg80211_cqm_config. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Johannes Berg <johannes@sipsolutions.net> 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: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- net/wireless/core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)