[src/trunk]: src/sys/dev Fail open when ipmi device was found.

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a9200fa7dcd3
branches:  trunk
changeset: 983793:a9200fa7dcd3
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sun Jun 06 11:48:55 2021 +0000

description:
Fail open when ipmi device was found.
Clear sc_envsys on failure to prevent double-free.

diffstat:

 sys/dev/ipmi.c |  14 +++++++++++---
 1 files changed, 11 insertions(+), 3 deletions(-)

diffs (56 lines):

diff -r 3370d8e278f9 -r a9200fa7dcd3 sys/dev/ipmi.c
--- a/sys/dev/ipmi.c    Sun Jun 06 11:35:22 2021 +0000
+++ b/sys/dev/ipmi.c    Sun Jun 06 11:48:55 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ipmi.c,v 1.5 2020/08/17 08:34:36 nonaka Exp $ */
+/*     $NetBSD: ipmi.c,v 1.6 2021/06/06 11:48:55 mlelstv Exp $ */
 
 /*
  * Copyright (c) 2019 Michael van Elst
@@ -76,7 +76,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ipmi.c,v 1.5 2020/08/17 08:34:36 nonaka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ipmi.c,v 1.6 2021/06/06 11:48:55 mlelstv Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -238,7 +238,6 @@
 static int bmc_io_wait_spin(struct ipmi_softc *, int, uint8_t, uint8_t);
 static int bmc_io_wait_sleep(struct ipmi_softc *, int, uint8_t, uint8_t);
 
-static void *bt_buildmsg(struct ipmi_softc *, int, int, int, const void *, int *);
 static void *cmn_buildmsg(struct ipmi_softc *, int, int, int, const void *, int *);
 
 static int getbits(uint8_t *, int, int);
@@ -268,6 +267,7 @@
 static int kcs_sendmsg(struct ipmi_softc *, int, const uint8_t *);
 static int kcs_recvmsg(struct ipmi_softc *, int, int *len, uint8_t *);
 
+static void *bt_buildmsg(struct ipmi_softc *, int, int, int, const void *, int *);
 static int bt_probe(struct ipmi_softc *);
 static int bt_reset(struct ipmi_softc *);
 static int bt_sendmsg(struct ipmi_softc *, int, const uint8_t *);
@@ -2034,6 +2034,7 @@
        if (sysmon_envsys_register(sc->sc_envsys)) {
                aprint_error_dev(self, "unable to register with sysmon\n");
                sysmon_envsys_destroy(sc->sc_envsys);
+               sc->sc_envsys = NULL;
        }
 
        /* initialize sensor list for thread */
@@ -2314,6 +2315,13 @@
 static int
 ipmi_open(dev_t dev, int flag, int fmt, lwp_t *l)
 {
+       struct ipmi_softc *sc;
+       int unit;
+
+       unit = IPMIUNIT(dev);
+       if ((sc = device_lookup_private(&ipmi_cd, unit)) == NULL)
+               return (ENXIO);
+
        return 0;
 }