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ether: Add a KMSAN check for transmitted frames

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This helps ensure that outbound packet data is initialized per KMSAN.

Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Mark Johnston 2021-08-11 16:23:12 -04:00
parent 645b7efd49
commit 24fe461284
1 changed files with 8 additions and 3 deletions
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11
sys/net/if_ethersubr.c
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@ -46,8 +46,9 @@
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/msan.h>
#include <sys/proc.h>
#include <sys/priv.h>
#include <sys/random.h>
@ -502,9 +503,13 @@ ether_output_frame(struct ifnet *ifp, struct mbuf *m)
#endif
/*
* Queue message on interface, update output statistics if
* successful, and start output if interface not yet active.
* Queue message on interface, update output statistics if successful,
* and start output if interface not yet active.
*
* If KMSAN is enabled, use it to verify that the data does not contain
* any uninitialized bytes.
*/
kmsan_check_mbuf(m, "ether_output");
return ((ifp->if_transmit)(ifp, m));
}