netdev - Re: [BUG] "sleeping in invalid" in dev_change

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Message-ID: <Pine.LNX.4.64.1301171539210.30897@axis700.grange>
Date:	Thu, 17 Jan 2013 16:32:08 +0100 (CET)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>
Subject: Re: [BUG] "sleeping in invalid" in dev_change_name()

Hi Eric

On Thu, 17 Jan 2013, Eric Dumazet wrote:

> On Thu, 2013-01-17 at 11:22 +0100, Guennadi Liakhovetski wrote:
> > Hi, getting a BUG dump below from a wireless driver, is probably not 
> > driver specific. Just not seeing it normally, because in most cases the 
> > name is either the same, or the interface is already up and you get a 
> > -EBUSY back.
> > 
> > Thanks
> > Guennadi
> > ---
> > Guennadi Liakhovetski, Ph.D.
> > Freelance Open-Source Software Developer
> > http://www.open-technology.de/
> > 
> > [   63.789062] mmc1: queuing unknown CIS tuple 0x80 (5 bytes)
> > [   63.789062] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> > [   63.804687] mmc1: queuing unknown CIS tuple 0x80 (9 bytes)
> > [   63.804687] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> > [   63.812500] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> > [   63.820312] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
> > [   63.820312] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
> > [   63.828125] mmc1: queuing unknown CIS tuple 0x80 (5 bytes)
> > [   63.835937] mmc1: queuing unknown CIS tuple 0x80 (9 bytes)
> > [   63.843750] mmc1: new SDIO card at address 0001
> > [   63.851562] b43-sdio mmc1:0001:1: Chip ID 14e4:4318
> > [   63.851562] ssb: Found chip with id 0x4318, rev 0x02 and package 0x00
> > [   63.867187] ssb: Core 0 found: ChipCommon (cc 0x800, rev 0x0D, vendor 0x4243)
> > [   63.875000] ssb: Core 1 found: IEEE 802.11 (cc 0x812, rev 0x09, vendor 0x4243)
> > [   63.890625] ssb: Core 2 found: PCI (cc 0x804, rev 0x0C, vendor 0x4243)
> > [   63.890625] ssb: Core 3 found: PCMCIA (cc 0x80D, rev 0x07, vendor 0x4243)
> > [   63.906250] b43-phy0: Broadcom 4318 WLAN found (core revision 9)
> > [   63.960937] b43-phy0: Found PHY: Analog 3, Type 2 (G), Revision 7
> > [   64.015625] ssb: Sonics Silicon Backplane found on SDIO device mmc1:0001:1
> > [   64.187500] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
> > [   64.203125] BUG: sleeping function called from invalid context at .../linux/mm/slab.c:3179
> > [   64.210937] in_atomic(): 1, irqs_disabled(): 0, pid: 940, name: udevd
> > [   64.218750] Backtrace: 
> > [   64.218750] [<c0012724>] (dump_backtrace+0x0/0x110) from [<c0267c80>] (dump_stack+0x18/0x1c)
> > [   64.226562]  r6:cf1c6bc0 r5:000000d0 r4:cf000080 r3:60000013
> > [   64.234375] [<c0267c68>] (dump_stack+0x0/0x1c) from [<c004493c>] (__might_sleep+0xec/0x10c)
> > [   64.242187] [<c0044850>] (__might_sleep+0x0/0x10c) from [<c008f988>] (__kmalloc_track_caller+0x80/0x188)
> > [   64.250000] [<c008f908>] (__kmalloc_track_caller+0x0/0x188) from [<c0074dac>] (kstrdup+0x38/0x54)
> > [   64.257812]  r7:000000d0 r6:cf1c6bc0 r5:00000006 r4:c0199af4
> > [   64.257812] [<c0074d74>] (kstrdup+0x0/0x54) from [<c0199af4>] (device_rename+0x34/0xa4)
> > [   64.265625]  r7:c03ca0c0 r6:cf4b9000 r5:cf4b9000 r4:cf4b9218
> > [   64.273437] [<c0199ac0>] (device_rename+0x0/0xa4) from [<c01eb9f4>] (dev_change_name+0xdc/0x274)
> > [   64.281250]  r7:c03ca0c0 r6:00000000 r5:cf4b9000 r4:cf504000
> > [   64.289062] [<c01eb918>] (dev_change_name+0x0/0x274) from [<c01ebd5c>] (dev_ifsioc+0x1d0/0x34c)
> > [   64.296875] [<c01ebb8c>] (dev_ifsioc+0x0/0x34c) from [<c01ec4a4>] (dev_ioctl+0x5cc/0x748)
> > [   64.304687]  r7:cf505e70 r6:00000000 r5:00008923 r4:bea7e220
> > [   64.312500] [<c01ebed8>] (dev_ioctl+0x0/0x748) from [<c01d8954>] (sock_ioctl+0x270/0x2a4)
> > [   64.320312] [<c01d86e4>] (sock_ioctl+0x0/0x2a4) from [<c00a0f84>] (vfs_ioctl+0x28/0x40)
> > [   64.328125]  r6:00000003 r5:cf1d4340 r4:bea7e220 r3:c01d86e4
> > [   64.335937] [<c00a0f5c>] (vfs_ioctl+0x0/0x40) from [<c00a1738>] (do_vfs_ioctl+0x5b0/0x5fc)
> > [   64.343750] [<c00a1188>] (do_vfs_ioctl+0x0/0x5fc) from [<c00a17c8>] (sys_ioctl+0x44/0x64)
> > [   64.351562] [<c00a1784>] (sys_ioctl+0x0/0x64) from [<c000ec00>] (ret_fast_syscall+0x0/0x30)
> > [   64.359375]  r8:c000eda8 r7:00000036 r6:b6fb7d98 r5:b6fcf1a8 r4:b6fcf168
> > [   84.742187] b43-phy0: Loading OpenSource firmware version 410.31754
> > [   84.742187] b43-phy0: Hardware crypto acceleration not supported by firmware
> > --
> 
> Hard to say, you forgot to tell what is the kernel version.

Sorry, it is 3.8-rc1 based.

> I guess you didnt upgrade your tree recently ?
> 
> # git describe --contains 30e6c9fa93cf3dbc7cc6df1d748ad25e4264545a
> v3.8-rc2~19^2~17

This patch wasn't there, it does seem to fix the problem, thanks!

Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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