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d5d2bf3eab
linux/drivers/net/usb
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Bjørn Mork 4f4178f3bb net: cdc_mbim: __vlan_find_dev_deep need rcu_read_lock 
Fixes this warning introduced by commit 5b8f15f78e
("net: cdc_mbim: handle IPv6 Neigbor Solicitations"):

===============================
[ INFO: suspicious RCU usage. ]
3.15.0-rc3 #213 Tainted: G        W  O
-------------------------------
net/8021q/vlan_core.c:69 suspicious rcu_dereference_check() usage!

other info that might help us debug this:

rcu_scheduler_active = 1, debug_locks = 1
no locks held by ksoftirqd/0/3.

stack backtrace:
CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G        W  O  3.15.0-rc3 #213
Hardware name: LENOVO 2776LEG/2776LEG, BIOS 6EET55WW (3.15 ) 12/19/2011
 0000000000000001 ffff880232533bf0 ffffffff813a5ee6 0000000000000006
 ffff880232530090 ffff880232533c20 ffffffff81076b94 0000000000000081
 0000000000000000 ffff8802085ac000 ffff88007fc8ea00 ffff880232533c50
Call Trace:
 [<ffffffff813a5ee6>] dump_stack+0x4e/0x68
 [<ffffffff81076b94>] lockdep_rcu_suspicious+0xfa/0x103
 [<ffffffff813978a6>] __vlan_find_dev_deep+0x54/0x94
 [<ffffffffa04a1938>] cdc_mbim_rx_fixup+0x379/0x66a [cdc_mbim]
 [<ffffffff813ab76f>] ? _raw_spin_unlock_irqrestore+0x3a/0x49
 [<ffffffff81079671>] ? trace_hardirqs_on_caller+0x192/0x1a1
 [<ffffffffa059bd10>] usbnet_bh+0x59/0x287 [usbnet]
 [<ffffffff8104067d>] tasklet_action+0xbb/0xcd
 [<ffffffff81040057>] __do_softirq+0x14c/0x30d
 [<ffffffff81040237>] run_ksoftirqd+0x1f/0x50
 [<ffffffff8105f13e>] smpboot_thread_fn+0x172/0x18e
 [<ffffffff8105efcc>] ? SyS_setgroups+0xdf/0xdf
 [<ffffffff810594b0>] kthread+0xb5/0xbd
 [<ffffffff813a84b1>] ? __wait_for_common+0x13b/0x170
 [<ffffffff810593fb>] ? __kthread_parkme+0x5c/0x5c
 [<ffffffff813b147c>] ret_from_fork+0x7c/0xb0
 [<ffffffff810593fb>] ? __kthread_parkme+0x5c/0x5c

Fixes: 5b8f15f78e ("net: cdc_mbim: handle IPv6 Neigbor Solicitations")
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-05-07 15:09:52 -04:00
..
asix_common.c usb: Fix FSF address in file headers 2013-12-06 12:37:55 -05:00
asix_devices.c net: asix: add missing flag to struct driver_info 2014-02-14 15:47:43 -05:00
asix.h drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
ax88172a.c usb: Fix FSF address in file headers 2013-12-06 12:37:55 -05:00
ax88179_178a.c USB fixes for 3.14-rc6 2014-03-09 18:59:14 -07:00
catc.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
cdc_eem.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
cdc_ether.c qmi_wwan/cdc_ether: move Novatel E371 (1410:9011) to qmi_wwan 2014-03-31 16:06:11 -04:00
cdc_mbim.c net: cdc_mbim: __vlan_find_dev_deep need rcu_read_lock 2014-05-07 15:09:52 -04:00
cdc_ncm.c net: cdc_ncm: fix buffer overflow 2014-05-05 15:19:31 -04:00
cdc_subset.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
cdc-phonet.c net: cdc-phonet: Staticize usbpn_probe 2013-09-20 14:41:02 -04:00
cx82310_eth.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
dm9601.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-01-18 00:55:41 -08:00
gl620a.c usbnet: remove generic hard_header_len check 2014-02-17 14:35:46 -05:00
hso.c hso: remove some dead code 2014-02-06 21:28:05 -08:00
huawei_cdc_ncm.c net: huawei_cdc_ncm: Introduce the huawei_cdc_ncm driver 2013-11-05 15:21:25 -05:00
int51x1.c usb: Fix FSF address in file headers 2013-12-06 12:37:55 -05:00
ipheth.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
kalmia.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
kaweth.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
Kconfig USB2NET: Fix Default to 'y' for SR9800 Device Driver, setting to 'n' 2014-02-13 18:42:01 -05:00
lg-vl600.c lg-vl600: Convert uses of __constant_<foo> to <foo> 2014-03-12 15:28:06 -04:00
Makefile r8152: disable the ECM mode 2014-03-05 20:40:24 -05:00
mcs7830.c usbnet: remove generic hard_header_len check 2014-02-17 14:35:46 -05:00
net1080.c usbnet: remove generic hard_header_len check 2014-02-17 14:35:46 -05:00
pegasus.c usbnet: pegasus: endian bug in write_mii_word() 2013-05-03 16:10:23 -04:00
pegasus.h drivers: net: usb: pegasus: fix control urb submission 2013-04-29 13:57:50 -04:00
plusb.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
qmi_wwan.c net: qmi_wwan: add a number of Dell devices 2014-04-27 22:05:09 -04:00
r8152.c r8152: check RTL8152_UNPLUG 2014-04-12 01:59:38 -04:00
rndis_host.c usbnet: remove generic hard_header_len check 2014-02-17 14:35:46 -05:00
rtl8150.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
sierra_net.c usb: Fix FSF address in file headers 2013-12-06 12:37:55 -05:00
smsc75xx.c usbnet: remove generic hard_header_len check 2014-02-17 14:35:46 -05:00
smsc75xx.h usb: Fix FSF address in file headers 2013-12-06 12:37:55 -05:00
smsc95xx.c usbnet: remove generic hard_header_len check 2014-02-17 14:35:46 -05:00
smsc95xx.h usb: Fix FSF address in file headers 2013-12-06 12:37:55 -05:00
sr9700.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
sr9700.h USB2NET : SR9700 : One chip USB 1.1 USB2NET SR9700Device Driver Support 2013-09-03 22:26:03 -04:00
sr9800.c usbnet: remove generic hard_header_len check 2014-02-17 14:35:46 -05:00
sr9800.h USB2NET : SR9800 : One chip USB2.0 USB2NET SR9800 Device Driver Support 2014-02-10 16:53:06 -08:00
usbnet.c usbnet: include wait queue head in device structure 2014-03-27 14:59:10 -04:00
zaurus.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00