linux-kernel - Re: kobject: delayed kobject release: help find buggy drivers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130905211113.GA22201@redhat.com>
Date:	Thu, 5 Sep 2013 17:11:13 -0400
From:	Dave Jones <davej@...hat.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Greg KH <gregkh@...uxfoundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: kobject: delayed kobject release: help find buggy drivers

On Thu, Sep 05, 2013 at 03:29:17PM -0400, Dave Jones wrote:
 > On Thu, Sep 05, 2013 at 06:35:40PM +0100, Russell King - ARM Linux wrote:
 >  
 >  > Dave - thanks for your patience and effort in trying to track this down.
 >  > Hopefully the patch below will make it easier.
 >  
 > I'm not sure if this is happening because I enabled DEBUG_KOBJECT this time around
 > or not, but now I'm seeing a different trace. (same hang though)
 > 
 > serial8250: ttyS0 at I/O 0x3f8 (ieq =4, base_baud = 115200) is 16550A
 > Oops
 > RIP: kobject_release
 > trace:
 > 
 > kobject_put
 > cdev_del
 > tty_unregister_device
 > uart_remove_one_port
 > serial8250_register_8250_port
 > pciserial_init_ports
 > pciserial_init_one
 > local_pci_probe
 > pci_device_probe
 > driver_probe_device
 > __driver_attach
 > ? __device_attach
 > bus_for_each_dev
 > driver_attach
 > bus_add_driver
 > ? early_serial_setup
 > driver_register
 > ? early_serial_setup
 > __pci_register_driver
 > serial_pci_driver_init
 > do_one_initcall
 > 
 > 
 > Trying without serial console next..

rebuilt with all serial turned off.

no luck, then it oopses somewhere else. I'm suspecting something isn't
right with that debug patch, as the next trace is also in kobject_release

	Dave
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/