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Message-Id: <20071105191341.9b9dd857.akpm@linux-foundation.org>
Date:	Mon, 5 Nov 2007 19:13:41 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Soeren Sonnenburg <kernel@....de>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Dmitry Torokhov <dtor@...l.ru>, Jiri Kosina <jikos@...os.cz>
Subject: Re: 2.6.23: no more free evdev devices - evdev leak?

On Wed, 31 Oct 2007 16:34:44 +0000 Soeren Sonnenburg <kernel@....de> wrote:

> Dear all,

(cc's added)

> whenever I do a suspend resume cycle the input device's numbers are
> increased until I finally run out of evdev devices. Is this a kernel
> problem or some userspace program (udev/...) creating new devices all
> the time?
> 
> here is the dmesg:
> 
> Soeren
> 
> input: Power Button (FF) as /devices/virtual/input/input0
> input: Lid Switch as /devices/virtual/input/input1
> input: Power Button (CM) as /devices/virtual/input/input2
> input: Sleep Button (CM) as /devices/virtual/input/input3
> input: Macintosh mouse button emulation as /devices/virtual/input/input4
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input5
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input6
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input7
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input8
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input9
> input: Video Bus as /devices/virtual/input/input10
> input: applesmc as /devices/platform/applesmc.768/input/input11
> input: appletouch disconnected
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input12
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input13
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input14
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input15
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input16
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: appletouch disconnected
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input17
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input18
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input19
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input20
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input21
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: appletouch disconnected
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input22
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input23
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input24
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input25
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input26
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: appletouch disconnected
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input27
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input28
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input29
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input30
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input31
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: appletouch disconnected
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input32
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input33
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input34
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input35
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input36
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: appletouch disconnected
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input37
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input38
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input39
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input40
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input41
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: appletouch disconnected
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/input/input42
> input: USB HID v1.11 Keyboard [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: appletouch as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.1/input/input43
> input: Apple Computer Apple Internal Keyboard / Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.2/input/input44
> input: USB HID v1.11 Device [Apple Computer Apple Internal Keyboard / Trackpad] on usb-0000:00:1d.0-2
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input45
> input: USB HID v1.11 Keyboard [HID 05ac:1000] on usb-0000:00:1d.3-1
> input: HID 05ac:1000 as /devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.1/input/input46
> input: failed to attach handler evdev to device input46, error: -23
> input: USB HID v1.11 Mouse [HID 05ac:1000] on usb-0000:00:1d.3-1
> evdev: no more free evdev devices
> input: failed to attach handler evdev to device input46, error: -23
> 

Did earlier kernels do the same thing, or was this problem introduced in
2.6.23?

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