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USB: usb-skeleton.c: fix open/disconnect race
authorMing Lei <tom.leiming@gmail.com>
Fri, 16 Dec 2011 14:20:01 +0000 (22:20 +0800)
committerGreg Kroah-Hartman <gregkh@suse.de>
Wed, 4 Jan 2012 23:52:41 +0000 (15:52 -0800)
If usb device is disconnected between usb_get_intfdata()
and kref_get() in skel_open(), kref_get may access a freed
object.

Also check if device is disconnected in ->open.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

No differences found
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