On Sat, May 21, 2022 at 10:27 PM Zheyu Ma <zheyuma97@xxxxxxxxx> wrote: > > Hello, > > I found a bug in the ifcvf driver. > When removing the module, I got the following warning: > > [ 14.478123] general protection fault, probably for non-canonical > address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN PTI > [ 14.478701] KASAN: null-ptr-deref in range > [0x0000000000000028-0x000000000000002f] > [ 14.479922] RIP: 0010:vdpa_mgmtdev_unregister+0x39/0x150 > [ 14.484063] Call Trace: > [ 14.484186] <TASK> > [ 14.484292] ? _raw_spin_unlock_irqrestore+0x3d/0x60 > [ 14.484536] ifcvf_remove+0x3a/0x50 [ifcvf] > [ 14.484743] pci_device_remove+0x92/0x240 > > The reason is that the 'ifcvf_mgmt_dev' is zero which means that > ifcvf_vdpa_dev_add() was not executed. > Since I am not familiar with the driver, I cannot find a proper solution for it. > Looks like the drv data needs to be set in probe(). Could you pleas try to the attached patch? (compile test only). Thanks > Zheyu Ma >
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0001-vdpa-ifcvf-set-pci-driver-data-in-probe.patch
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