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SubjectBUG: KASAN: use-after-free in xhci_trb_virt_to_dma.part.24+0x1c/0x80
Date
Dear Linux folks,


Using Linux 4.18-rc5+ with kmemleak enabled on a MSI B350M MORTAR (MS-7A37)
with an AMD Ryzen 3 2200G, the memory leak below is suspected.

```
$ sudo less /sys/kernel/debug/kmemleak
unreferenced object 0xffff894f8874a2b8 (size 8):
comm "systemd-udevd", pid 119, jiffies 4294893109 (age 908.348s)
hex dump (first 8 bytes):
34 01 05 00 00 00 00 00 4.......
backtrace:
[<00000000308e4456>] xhci_init+0x81/0x170 [xhci_hcd]
[<00000000269aa18f>] xhci_gen_setup+0x2cb/0x510 [xhci_hcd]
[<000000007b70d85f>] xhci_pci_setup+0x4d/0x120 [xhci_pci]
[<0000000059f49127>] usb_add_hcd+0x2b6/0x800 [usbcore]
[<000000009a16d67c>] usb_hcd_pci_probe+0x1f3/0x460 [usbcore]
[<0000000001295c2e>] xhci_pci_probe+0x27/0x1d7 [xhci_pci]
[<00000000395bd8f9>] local_pci_probe+0x41/0x90
[<00000000a344e362>] pci_device_probe+0x189/0x1a0
[<00000000318999e5>] driver_probe_device+0x2b9/0x460
[<00000000c29d8a55>] __driver_attach+0xdd/0x110
[<00000000975b7f46>] bus_for_each_dev+0x76/0xc0
[<000000006bc40955>] bus_add_driver+0x152/0x230
[<00000000840ed63c>] driver_register+0x6b/0xb0
[<00000000123908c4>] do_one_initcall+0x46/0x1c3
[<00000000ce69c793>] do_init_module+0x5a/0x210
[<0000000091d4aef2>] load_module+0x21c4/0x2410
[…]
```


Kind regards,

Paul


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