Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [Regression, 2.6.33-rc1->current git] NULL pointer in usb_serial_probe() introduced by the recent kfifo changes | Date | Wed, 23 Dec 2009 17:15:11 +0100 |
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On Wednesday 23 December 2009, Greg KH wrote: > On Wed, Dec 23, 2009 at 02:51:31AM +0100, Rafael J. Wysocki wrote: > > Hi, > > > > Something like the patch below is necessary to fix a new NULL pointer deref > > in usb_serial_probe() that appeared after the recent kfifo changes (in short, > > the kfifo changes modified the semantics of kfifo_alloc() that > > usb_serial_probe() reiled on). > > What semantic changed? I thought that the kfifo patches came with > patches that also fixed up any changed that were needed. What went > wrong here?
Previously write_fifo was allocated by kfifo_alloc() along with the structure members. Now kfifo_alloc() expects to get a pointer to existing structure.
> Does your patch solve the oops?
Sure, that's why I posted it. :-)
Rafael
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