From: Juergen Gross <jgross@suse.com>
To: igor.druzhinin@citrix.com,
xen-devel <xen-devel@lists.xenproject.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
David Miller <davem@davemloft.net>, Wei Liu <wei.liu2@citrix.com>,
Paul Durrant <paul.durrant@citrix.com>
Subject: BUG due to "xen-netback: protect resource cleaning on XenBus disconnect"
Date: Thu, 2 Mar 2017 12:56:20 +0100 [thread overview]
Message-ID: <75c81731-e4a7-bde1-c4fd-a52e97b820a0@suse.com> (raw)
With commits f16f1df65 and 9a6cdf52b we get in our Xen testing:
[ 174.512861] switch: port 2(vif3.0) entered disabled state
[ 174.522735] BUG: sleeping function called from invalid context at
/home/build/linux-linus/mm/vmalloc.c:1441
[ 174.523451] in_atomic(): 1, irqs_disabled(): 0, pid: 28, name: xenwatch
[ 174.524131] CPU: 1 PID: 28 Comm: xenwatch Tainted: G W
4.10.0upstream-11073-g4977ab6-dirty #1
[ 174.524819] Hardware name: MSI MS-7680/H61M-P23 (MS-7680), BIOS V17.0
03/14/2011
[ 174.525517] Call Trace:
[ 174.526217] show_stack+0x23/0x60
[ 174.526899] dump_stack+0x5b/0x88
[ 174.527562] ___might_sleep+0xde/0x130
[ 174.528208] __might_sleep+0x35/0xa0
[ 174.528840] ? _raw_spin_unlock_irqrestore+0x13/0x20
[ 174.529463] ? __wake_up+0x40/0x50
[ 174.530089] remove_vm_area+0x20/0x90
[ 174.530724] __vunmap+0x1d/0xc0
[ 174.531346] ? delete_object_full+0x13/0x20
[ 174.531973] vfree+0x40/0x80
[ 174.532594] set_backend_state+0x18a/0xa90
[ 174.533221] ? dwc_scan_descriptors+0x24d/0x430
[ 174.533850] ? kfree+0x5b/0xc0
[ 174.534476] ? xenbus_read+0x3d/0x50
[ 174.535101] ? xenbus_read+0x3d/0x50
[ 174.535718] ? xenbus_gather+0x31/0x90
[ 174.536332] ? ___might_sleep+0xf6/0x130
[ 174.536945] frontend_changed+0x6b/0xd0
[ 174.537565] xenbus_otherend_changed+0x7d/0x80
[ 174.538185] frontend_changed+0x12/0x20
[ 174.538803] xenwatch_thread+0x74/0x110
[ 174.539417] ? woken_wake_function+0x20/0x20
[ 174.540049] kthread+0xe5/0x120
[ 174.540663] ? xenbus_printf+0x50/0x50
[ 174.541278] ? __kthread_init_worker+0x40/0x40
[ 174.541898] ret_from_fork+0x21/0x2c
[ 174.548635] switch: port 2(vif3.0) entered disabled state
I believe calling vfree() when holding a spin_lock isn't a good idea.
Boris, this is the dumpdata failure:
FAILURE 4.10.0upstream-11073-g4977ab6-dirty(x86_64)
4.10.0upstream-11073-g4977ab6-dirty(i386)\: 2017-03-02 (tst007)
Juergen
next reply other threads:[~2017-03-02 11:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-02 11:56 Juergen Gross [this message]
2017-03-02 12:06 ` Wei Liu
2017-03-02 12:12 ` Juergen Gross
2017-03-02 12:19 ` Paul Durrant
2017-03-02 14:55 ` Igor Druzhinin
2017-03-02 14:25 ` Boris Ostrovsky
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=75c81731-e4a7-bde1-c4fd-a52e97b820a0@suse.com \
--to=jgross@suse.com \
--cc=boris.ostrovsky@oracle.com \
--cc=davem@davemloft.net \
--cc=igor.druzhinin@citrix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=paul.durrant@citrix.com \
--cc=wei.liu2@citrix.com \
--cc=xen-devel@lists.xenproject.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
all inboxes | Powered by JetHome®