Messages in this thread Patch in this message | | | Date | Wed, 11 Feb 2015 16:50:57 -0600 | From | Bjorn Helgaas <> | Subject | Re: [PATCH] drivers: of: pci: remove duplicate kfree in of_pci_get_host_bridge_resources |
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On Wed, Feb 11, 2015 at 04:58:35AM +0000, Lorenzo Pieralisi wrote: > Commit d2be00c0fb5a ("of/pci: Free resources on failure in > of_pci_get_host_bridge_resources()") fixed the error code path in > of_pci_get_host_bridge_resources() by adding code that runs through the > resources list to free all resources in it and then calls kfree on the > bus_range resource pointer to complete the memory deallocation. > Since the bus_range resource is added to the resources list through > pci_add_resource, the resource_list_for_each_entry loop in the error > exit path frees it already and freeing it anew could trigger a double > free, hence this patch removes the superfluos kfree call on the bus_range > resource. > > Fixes: d2be00c0fb5a ("of/pci: Free resources on failure in of_pci_get_host_bridge_resources()") > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> > Reported-by: Jiang Liu <jiang.liu@linux.intel.com> > Cc: Bjorn Helgaas <bhelgaas@google.com> > Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
I applied this to for-linus, and will ask Linus to put it in before v3.20-rc1, thanks!
Rafael, I applied d2be00c0fb5a, where the bug originally came from, but I see that you fixed it with 5c493df25a0d and the fix got lost because of an incorrect merge resolution. So if you'd rather take this, just let me know.
> --- > drivers/of/of_pci.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c > index 110fece..62426d8 100644 > --- a/drivers/of/of_pci.c > +++ b/drivers/of/of_pci.c > @@ -229,7 +229,6 @@ parse_failed: > resource_list_for_each_entry(window, resources) > kfree(window->res); > pci_free_resource_list(resources); > - kfree(bus_range); > return err; > } > EXPORT_SYMBOL_GPL(of_pci_get_host_bridge_resources); > -- > 2.2.1 >
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