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SubjectRe: BUG: KASAN: use-after-free in xhci_trb_virt_to_dma.part.24+0x1c/0x80
On Fri, Jul 20, 2018 at 11:44:49AM +0200, Paul Menzel wrote:
> 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
> […]
> ```

That's really vague. Any chance for a reproducer or some other types of
hints as to what you feel the problem is here?

thanks,

greg k-h

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