From: Konstantin Khlebnikov <khlebnikov@openvz.org>
To: linux-kernel@vger.kernel.org
Cc: Rodolfo Giometti <giometti@enneenne.com>
Subject: [PATCH 04/12] pps: pps_parport: fix oops on module unloading
Date: Fri, 14 Dec 2012 15:02:40 +0400 [thread overview]
Message-ID: <20121214110240.11019.48429.stgit@zurg> (raw)
In-Reply-To: <20121214110229.11019.63713.stgit@zurg>
Seems like port->cad is NULL for unused ports
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Rodolfo Giometti <giometti@enneenne.com>
---
[ 0.151192] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 0.151759] IP: [<ffffffffa2de3048>] parport_detach+0x24/0x95 [pps_parport]
[ 0.153875] Process rmmod (pid: 22117, threadinfo ffff880061174000, task ffff8800613db000)
[ 0.153875] Call Trace:
[ 0.153875] [<ffffffffa064c49c>] parport_unregister_driver+0x51/0x8b [parport]
[ 0.153875] [<ffffffffa2de364f>] pps_parport_exit+0x17/0x20 [pps_parport]
[ 0.153875] [<ffffffff8110e976>] sys_delete_module+0x328/0x3d2
[ 0.153875] [<ffffffff8168e7e8>] tracesys+0xe1/0xe6
---
drivers/pps/clients/pps_parport.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pps/clients/pps_parport.c b/drivers/pps/clients/pps_parport.c
index e1b4705..7e9bcd4 100644
--- a/drivers/pps/clients/pps_parport.c
+++ b/drivers/pps/clients/pps_parport.c
@@ -194,7 +194,7 @@ static void parport_detach(struct parport *port)
struct pps_client_pp *device;
/* FIXME: oooh, this is ugly! */
- if (strcmp(pardev->name, KBUILD_MODNAME))
+ if (!pardev || strcmp(pardev->name, KBUILD_MODNAME))
/* not our port */
return;
next prev parent reply other threads:[~2012-12-14 11:05 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-14 11:02 [PATCH 01/12] tools/testing/modules: introduce test which loads/unloads random modules Konstantin Khlebnikov
2012-12-14 11:02 ` [PATCH 02/12] driver core: add debug-objects debug for device-drivers Konstantin Khlebnikov
2012-12-14 11:02 ` [PATCH 03/12] mISDN: fix race in timer canceling on module unloading Konstantin Khlebnikov
2012-12-14 18:16 ` David Miller
2012-12-14 11:02 ` Konstantin Khlebnikov [this message]
2012-12-14 11:02 ` [PATCH 05/12] staging: vme_pio2: fix oops " Konstantin Khlebnikov
2012-12-17 12:01 ` Martyn Welch
2012-12-14 11:02 ` [PATCH 06/12] media/rc: fix oops on unloading module rc-core Konstantin Khlebnikov
2012-12-14 11:02 ` [PATCH 07/12] stmmac: fix platform driver unregistering Konstantin Khlebnikov
2012-12-14 18:16 ` David Miller
2012-12-14 11:02 ` [PATCH 08/12] bonding: do not cancel works in bond_uninit() Konstantin Khlebnikov
2012-12-14 18:16 ` David Miller
2012-12-14 11:02 ` [PATCH 09/12] pps: fix device destruction ordering Konstantin Khlebnikov
2012-12-14 11:03 ` [PATCH 10/12] mac802154: fix destructon ordering for ieee802154 devices Konstantin Khlebnikov
2012-12-14 18:16 ` David Miller
2012-12-14 18:16 ` David Miller
2012-12-14 11:03 ` [PATCH 11/12] firmware/dmi-sysfs: fix sysfs warning on module unload Konstantin Khlebnikov
2012-12-14 11:03 ` [PATCH 12/12] edac: fix kernel panic on module unloading Konstantin Khlebnikov
2012-12-14 11:26 ` Alan Cox
2012-12-14 11:50 ` Borislav Petkov
2012-12-14 11:55 ` Konstantin Khlebnikov
2012-12-14 13:26 ` Alan Cox
2012-12-15 17:53 ` Borislav Petkov
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