From: Valdis.Kletnieks@vt.edu
To: Andrew Morton <akpm@linux-foundation.org>,
"David S. Miller" <davem@davemloft.net>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: 2.6.39-rc6-mmotm0506 - another lockdep splat (networking this time)
Date: Mon, 09 May 2011 21:05:23 -0400 [thread overview]
Message-ID: <6954.1304989523@localhost> (raw)
[-- Attachment #1: Type: text/plain, Size: 2458 bytes --]
Seen during boot this afternoon:
[ 43.309549]
[ 43.309550] ===================================================
[ 43.309553] [ INFO: suspicious rcu_dereference_check() usage. ]
[ 43.309555] ---------------------------------------------------
[ 43.309558] include/linux/inetdevice.h:226 invoked rcu_dereference_check() without protection!
[ 43.309560]
[ 43.309561] other info that might help us debug this:
[ 43.309561]
[ 43.309563]
[ 43.309564] rcu_scheduler_active = 1, debug_locks = 1
[ 43.309567] 2 locks held by ip/1193:
[ 43.309568] #0: (nlk->cb_mutex){+.+...}, at: [<ffffffff81426c1d>] netlink_dump+0x45/0x1d0
[ 43.309579] #1: (rcu_read_lock){.+.+..}, at: [<ffffffff8141b9b9>] rtnl_dump_ifinfo+0x0/0x156
[ 43.309587]
[ 43.309587] stack backtrace:
[ 43.309590] Pid: 1193, comm: ip Not tainted 2.6.39-rc6-mmotm0506 #1
[ 43.309592] Call Trace:
[ 43.309599] [<ffffffff81066b6e>] lockdep_rcu_dereference+0x9a/0xa2
[ 43.309604] [<ffffffff81468d41>] __in_dev_get_rtnl+0x3c/0x47
[ 43.309607] [<ffffffff81468ef0>] inet_fill_link_af+0x12/0x5b
[ 43.309611] [<ffffffff8141b8fc>] rtnl_fill_ifinfo+0x665/0x710
[ 43.309616] [<ffffffff8141ba76>] rtnl_dump_ifinfo+0xbd/0x156
[ 43.309620] [<ffffffff81426c37>] netlink_dump+0x5f/0x1d0
[ 43.309624] [<ffffffff81404e3e>] ? consume_skb+0x8a/0x8f
[ 43.309628] [<ffffffff81426fc8>] netlink_recvmsg+0x1dd/0x31d
[ 43.309632] [<ffffffff813ff21f>] ? rcu_read_unlock+0x21/0x23
[ 43.309636] [<ffffffff813fab57>] sock_recvmsg+0xed/0x112
[ 43.309641] [<ffffffff810d1ebf>] ? might_fault+0x4e/0x9e
[ 43.309645] [<ffffffff81068816>] ? __lock_release+0x93/0x9c
[ 43.309649] [<ffffffff810d1ebf>] ? might_fault+0x4e/0x9e
[ 43.309652] [<ffffffff810d1f08>] ? might_fault+0x97/0x9e
[ 43.309656] [<ffffffff814065f8>] ? copy_from_user+0x3c/0x44
[ 43.309660] [<ffffffff813fc047>] __sys_recvmsg+0x16c/0x224
[ 43.309665] [<ffffffff81059240>] ? up_read+0x23/0x27
[ 43.309669] [<ffffffff81065165>] ? arch_local_irq_save+0x9/0xc
[ 43.309673] [<ffffffff810f736b>] ? fcheck_files+0xb4/0xeb
[ 43.309676] [<ffffffff810f79f3>] ? fget_light+0x35/0x96
[ 43.309680] [<ffffffff813fdded>] sys_recvmsg+0x3d/0x5b
[ 43.309686] [<ffffffff815705bb>] system_call_fastpath+0x16/0x1b
[ 44.437679] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X
[ 44.488363] e1000e 0000:00:19.0: irq 46 for MSI/MSI-X
[ 44.494680] ADDRCONF(NETDEV_UP): eth0: link is not ready
[-- Attachment #2: Type: application/pgp-signature, Size: 227 bytes --]
next reply other threads:[~2011-05-10 1:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-10 1:05 Valdis.Kletnieks [this message]
2011-05-10 2:23 ` 2.6.39-rc6-mmotm0506 - another lockdep splat (networking this time) Eric Dumazet
2011-05-10 3:47 ` Eric Dumazet
2011-05-10 3:58 ` David Miller
2011-05-10 21:48 ` Eric Dumazet
2011-05-10 21:59 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6954.1304989523@localhost \
--to=valdis.kletnieks@vt.edu \
--cc=akpm@linux-foundation.org \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).