git: 5b81e2e1bcdc - main - virtio_scsi: Zero stack-allocated CCBs

[Mark Johnston]

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=5b81e2e1bcdc2692044873e147f84b67e35e8dcd

commit 5b81e2e1bcdc2692044873e147f84b67e35e8dcd
Author:     Mark Johnston <markj at FreeBSD.org>
AuthorDate: 2021-05-17 02:14:41 +0000
Commit:     Mark Johnston <markj at FreeBSD.org>
CommitDate: 2021-05-17 02:20:39 +0000

    virtio_scsi: Zero stack-allocated CCBs
    
    Fixes:  3394d4239b ("cam: allocate CCBs from UMA for SCSI and ATA IO")
    Reported by:    syzbot+2e9ce63919709feb3d1c at syzkaller.appspotmail.com
    Reviewed by:    trasz
    Sponsored by:   The FreeBSD Foundation
---
 sys/dev/virtio/scsi/virtio_scsi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/dev/virtio/scsi/virtio_scsi.c b/sys/dev/virtio/scsi/virtio_scsi.c
index 51d9e5f532f7..adf4fd17fc5b 100644
--- a/sys/dev/virtio/scsi/virtio_scsi.c
+++ b/sys/dev/virtio/scsi/virtio_scsi.c
@@ -700,6 +700,7 @@ vtscsi_register_async(struct vtscsi_softc *sc)
 {
 	struct ccb_setasync csa;
 
+	memset(&csa, 0, sizeof(csa));
 	xpt_setup_ccb(&csa.ccb_h, sc->vtscsi_path, 5);
 	csa.ccb_h.func_code = XPT_SASYNC_CB;
 	csa.event_enable = AC_LOST_DEVICE | AC_FOUND_DEVICE;
@@ -716,6 +717,7 @@ vtscsi_deregister_async(struct vtscsi_softc *sc)
 {
 	struct ccb_setasync csa;
 
+	memset(&csa, 0, sizeof(csa));
 	xpt_setup_ccb(&csa.ccb_h, sc->vtscsi_path, 5);
 	csa.ccb_h.func_code = XPT_SASYNC_CB;
 	csa.event_enable = 0;