git: 453d8a7ee2fc - main - rsu: add KASSERT to document maximum mbuf size in rsu_tx_start

[Ed Maste]

The branch main has been updated by emaste:

URL: https://cgit.FreeBSD.org/src/commit/?id=453d8a7ee2fc862f3a5e98185d57c8ad05cbc047

commit 453d8a7ee2fc862f3a5e98185d57c8ad05cbc047
Author:     Ed Maste <emaste at FreeBSD.org>
AuthorDate: 2021-03-22 18:34:31 +0000
Commit:     Ed Maste <emaste at FreeBSD.org>
CommitDate: 2021-03-22 18:34:44 +0000

    rsu: add KASSERT to document maximum mbuf size in rsu_tx_start
    
    PR:             254479
    Reviewed by:    markj
    Sponsored by:   The FreeBSD Foundation
---
 sys/dev/usb/wlan/if_rsu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/dev/usb/wlan/if_rsu.c b/sys/dev/usb/wlan/if_rsu.c
index f2dc6657026e..4dd1c624b9d0 100644
--- a/sys/dev/usb/wlan/if_rsu.c
+++ b/sys/dev/usb/wlan/if_rsu.c
@@ -2897,6 +2897,7 @@ rsu_tx_start(struct rsu_softc *sc, struct ieee80211_node *ni,
 	}
 
 	xferlen = sizeof(*txd) + m0->m_pkthdr.len;
+	KASSERT(xferlen <= RSU_TXBUFSZ, ("%s: invalid length", __func__));
 	m_copydata(m0, 0, m0->m_pkthdr.len, (caddr_t)&txd[1]);
 
 	data->buflen = xferlen;