CVE-2021-47503

In the Linux kernel, the following vulnerability has been resolved: scsi:
pm80xx: Do not call scsi_remove_host() in pm8001_alloc() Calling
scsi_remove_host() before scsi_add_host() results in a crash: BUG: kernel
NULL pointer dereference, address: 0000000000000108 RIP:
0010:device_del+0x63/0x440 Call Trace: device_unregister+0x17/0x60
scsi_remove_host+0xee/0x2a0 pm8001_pci_probe+0x6ef/0x1b90 [pm80xx]
local_pci_probe+0x3f/0x90 We cannot call scsi_remove_host() in
pm8001_alloc() because scsi_add_host() has not been called yet at that
point in time. Function call tree: pm8001_pci_probe() | - pm8001_pci_alloc() | | | - pm8001_alloc() | | | - scsi_remove_host() | -
scsi_add_host()