Re: pci_walk_bus race condition

[Zhang, Yanmin]

On Fri, 2006-05-26 at 21:50, Greg KH wrote:
> On Fri, May 26, 2006 at 02:35:16PM +0800, Zhang, Yanmin wrote:
> > pci_walk_bus has a race with pci_destroy_dev. In the while loop,
> > when the callback function is called, dev pointed by next might be
> > freed and erased. So later on access to dev might cause kernel panic.
> 
> Have you seen this happen?  The only user of this function is the PPC64
> EEH handler, which last time I checked, didn't run on Intel based
> processors :)
I am enabling PCI-Express AER in kernel and want to use it. After
double-checking, I found the lock is not good.

Thanks,
Yanmin
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