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rum(4): Avoid uninitialized garbage in failed register read. 

Reported-by: syzbot+f2cba71b1b1bc91029b3@syzkaller.appspotmail.com
https://syzkaller.appspot.com/bug?id=7a01863d0fe34a4946516388c436991ba2beaa63
This commit is contained in:
riastradh 2022-08-12 19:13:36 +00:00
parent a5fdd92957
commit 3259e3c923
1 changed files with 4 additions and 2 deletions
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6
sys/dev/usb/if_rum.c
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@ -1,5 +1,5 @@
/* $OpenBSD: if_rum.c,v 1.40 2006/09/18 16:20:20 damien Exp $ */
/* $NetBSD: if_rum.c,v 1.69 2020/03/15 23:04:50 thorpej Exp $ */
/* $NetBSD: if_rum.c,v 1.70 2022/08/12 19:13:36 riastradh Exp $ */
/*-
* Copyright (c) 2005-2007 Damien Bergamini <damien.bergamini@free.fr>
@ -24,7 +24,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_rum.c,v 1.69 2020/03/15 23:04:50 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_rum.c,v 1.70 2022/08/12 19:13:36 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_usb.h"
@ -1407,6 +1407,7 @@ rum_eeprom_read(struct rum_softc *sc, uint16_t addr, void *buf, int len)
if (error != 0) {
printf("%s: could not read EEPROM: %s\n",
device_xname(sc->sc_dev), usbd_errstr(error));
memset(buf, 0, len);
}
}
@ -1436,6 +1437,7 @@ rum_read_multi(struct rum_softc *sc, uint16_t reg, void *buf, int len)
if (error != 0) {
printf("%s: could not multi read MAC register: %s\n",
device_xname(sc->sc_dev), usbd_errstr(error));
memset(buf, 0, len);
}
}