On Monday 03 of September 2012 15:34:11 Andrei Emeltchenko wrote:
> Hi all,
Hi Andrei,
>
> On Fri, Aug 31, 2012 at 10:54:58AM -0700, Gustavo Padovan wrote:
> > Hi Szymon,
> >
> > * Szymon Janc <szymon.janc@xxxxxxxxx> [2012-08-31 09:05:46 +0200]:
> >
> > > read_index_list is executed by user thread running in kernel-mode
> > > thus is allowed to sleep.
> > >
> > > Signed-off-by: Szymon Janc <szymon.janc@xxxxxxxxx>
> > > ---
> > > net/bluetooth/mgmt.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > Patch has been applied to bluetooth-next. Thanks.
>
> Was this tested? Gustavo please remove this patch from the tree untill
> this issue is fixed.
read_index_list() is only called from mgmt_control() (via mgmt_handlers[]).
mgmt_control (as well as other mgmt_handlers) allocate memory with
GFP_KERNEL flag.
I'm not sure why do you get this warning...
>
> [ 141.009142] BUG: sleeping function called from invalid context at
> mm/slub.c:943
> [ 141.009156] in_atomic(): 1, irqs_disabled(): 0, pid: 2476, name:
> bluetoothd
> [ 141.009159] 2 locks held by bluetoothd/2476:
> [ 141.009161] #0: (sk_lock-AF_BLUETOOTH-BTPROTO_HCI){+.+.+.}, at:
> [<f8a9c9da>] hci_sock_sendmsg+0x5a/0x310 [bluetooth]
> [ 141.009182] #1: (hci_dev_list_lock){++++.+}, at: [<f8a9623e>]
> read_index_list+0x2e/0x150 [bluetooth]
> [ 141.009200] Pid: 2476, comm: bluetoothd Tainted: G O 3.5.0+
> #56
> [ 141.009202] Call Trace:
> [ 141.009208] [<c10776c9>] __might_sleep+0xe9/0x120
> [ 141.009213] [<c114e249>] __kmalloc+0x1a9/0x240
> [ 141.009224] [<f8a96274>] ? read_index_list+0x64/0x150 [bluetooth]
> [ 141.009234] [<f8a96274>] read_index_list+0x64/0x150 [bluetooth]
> [ 141.009244] [<f8a9a2bc>] mgmt_control+0x22c/0x350 [bluetooth]
> [ 141.009248] [<c10a44fb>] ? trace_hardirqs_on+0xb/0x10
> [ 141.009252] [<c1051298>] ? local_bh_enable+0x68/0xd0
> [ 141.009264] [<f8a9c9da>] ? hci_sock_sendmsg+0x5a/0x310 [bluetooth]
> [ 141.009297] [<f8a9ca43>] hci_sock_sendmsg+0xc3/0x310 [bluetooth]
> [ 141.009302] [<c14f134d>] ? sock_update_classid+0x7d/0x120
> [ 141.009306] [<c14f1378>] ? sock_update_classid+0xa8/0x120
> [ 141.009311] [<c14ecc6b>] sock_aio_write+0xfb/0x120
> [ 141.009315] [<c14ee31e>] ? sys_sendto+0x10e/0x150
> [ 141.009320] [<c115fbf4>] do_sync_write+0xb4/0xf0
> [ 141.009326] [<c112f680>] ? might_fault+0x50/0xa0
> [ 141.009330] [<c11602cc>] ? rw_verify_area+0x6c/0x120
> [ 141.009334] [<c11606f1>] vfs_write+0x151/0x160
> [ 141.009337] [<c14eed02>] ? sys_socketcall+0x182/0x2e0
> [ 141.009341] [<c116090d>] sys_write+0x3d/0x70
> [ 141.009345] [<c15f739f>] sysenter_do_call+0x12/0x38
>
> Best regards
> Andrei Emeltchenko
--
BR
Szymon Janc
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