Replace one-element array with flexible-array member in struct
wmi_disconnect_event.
It's also worth noting that due to the flexible array transformation,
the size of struct wmi_disconnect_event changed (now the size is 1 byte
smaller), and in order to preserve the logic of before the transformation,
the following change is needed:
- if (len < sizeof(struct wmi_disconnect_event))
+ if (len <= sizeof(struct wmi_disconnect_event))
This issue was found with the help of Coccinelle and audited and fixed,
manually.
Link: https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/79
Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
---
Hi!
It'd be great if someone can confirm or comment on the following
changes described in the changelog text:
- if (len < sizeof(struct wmi_disconnect_event))
+ if (len <= sizeof(struct wmi_disconnect_event))
Thanks
drivers/net/wireless/ath/ath6kl/wmi.c | 2 +-
drivers/net/wireless/ath/ath6kl/wmi.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index ccdccead688e..645fb6cae3be 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -1023,7 +1023,7 @@ static int ath6kl_wmi_disconnect_event_rx(struct wmi *wmi, u8 *datap, int len,
struct wmi_disconnect_event *ev;
wmi->traffic_class = 100;
- if (len < sizeof(struct wmi_disconnect_event))
+ if (len <= sizeof(struct wmi_disconnect_event))
return -EINVAL;
ev = (struct wmi_disconnect_event *) datap;
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 6b064e669d87..6a7fc07cd9aa 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -1596,7 +1596,7 @@ struct wmi_disconnect_event {
u8 disconn_reason;
u8 assoc_resp_len;
- u8 assoc_info[1];
+ u8 assoc_info[];
} __packed;
/*
--
2.27.0
