Opened 4 years ago
Closed 4 years ago
#16856 closed bug (fixed)
XHCI: Smap violation
| Reported by: | nephele | Owned by: | waddlesplash |
|---|---|---|---|
| Priority: | normal | Milestone: | R1/beta3 |
| Component: | Drivers/USB/XHCI | Version: | R1/beta2 |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Platform: | All |
Description (last modified by )
This happened after plugging in a Nektar Impact GX61 into my monitor, which is a usb hub that is connected to the back of my motherboard.
The port on the mainboard that the monitor is connected to isn't blue, but it's potentially the same xhci controller anyway. The board has a A520 chipset
I pressed a couple of keys, the KDL happened as soon as i started MidiPlayer (Also managed to reproduce this by starting MidiPlayer first, plugging it in and then pressing any key on the keyboard)
Attachments (1)
Change History (8)
by , 4 years ago
| Attachment: | D35C36B5-F121-473B-8779-69C7E6051638.jpeg added |
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comment:1 by , 4 years ago
Probably the usb_midi driver is somehow passing user-mapped buffers that have kernel addresses.
comment:2 by , 4 years ago
| Description: | modified (diff) |
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comment:3 by , 4 years ago
I forgot to add that i had tested this specific keyboard on another device (a laptop) and the KDL didn't occur there with the usb2 ports
comment:4 by , 4 years ago
SMAP is only supported on Broadwell and up on Intel devices, if I recall correctly, and only enabled on x86_64 so it is more than probable that the other device is not using SMAP.
comment:6 by , 4 years ago
Replying to pulkomandy:
Can you try https://review.haiku-os.org/c/haiku/+/3806 ?
The review fixes the issue for me, tested on hrev55005 (as hrev55006+3, but with the latest commit reverted as it broke the haikudepot build for me)
comment:7 by , 4 years ago
| Milestone: | Unscheduled → R1/beta3 |
|---|---|
| Resolution: | → fixed |
| Status: | new → closed |
Applied in hrev55009
kdl