linux-kernel - Re: [NET] IPv6 oops bisected

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Message-ID: <4708F387.1060602@garzik.org>
Date:	Sun, 07 Oct 2007 10:56:07 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	"Denis V. Lunev" <dlunev@...il.com>
CC:	netdev <netdev@...r.kernel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, den@...nvz.org,
	David Miller <davem@...emloft.net>
Subject: Re: [NET] IPv6 oops bisected

Denis V. Lunev wrote:
> Jeff Garzik wrote:
>> Jeff Garzik wrote:
>>> The commit
>>>
>>> commit 5f5dace1ce001b24fb8286e09ffd3c4d2b547e09
>>> Author: Denis V. Lunev <den@...nvz.org>
>>> Date:   Thu Sep 27 12:41:26 2007 -0700
>>>
>>>     [NET]: Various dst_ifdown routines to catch refcounting bugs
>>>
>>> causes a 100% reproducible oops in net-2.6.24.git, in ip6_route_add().
>>>
>>> Platform: x86-64 Fedora 7
>>>
>>> Config and lspci attached.
>> And indeed, reverting this commit with 'patch -R' makes things work again.
>>
>>     Jeff
> 
> Can you me command to execute to reproduce the problem? and oops if
> possible.

The command is Fedora 7 initscripts...

(typing in by hand)

/etc/sysconfig/network-scripts/network-functions-ipv6: line 246: 1760 Killed
	LC_ALL=C /sbin/ip $options


NULL pointer dereference at 0x000003f8

backtrace:
:ipv6:ip6_route_add+0x1b1/0x543
rtnetlink_rcv_msg
inet6_rtm_newroute
netlink_run_queue
rtnetlink_rcv
netlink_data_ready
netlink_sendskb
netlink_sendmsg
sock_send_msg
mntput_no_expire
autoremove_wake_function
find_lock_page
zone_statistics
get_page_from_freelist
__alloc_pages
move_addr_to_kernel
verify_iovec
sys_sendmsg
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