#15172: SMAP violation when attaching FTDI based serial device
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Reporter: probono | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: Unscheduled
Component: Drivers/TTY | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Changes (by waddlesplash):
* owner: waddlesplash => nobody
* cc: PulkoMandy (added)
* component: Drivers/USB/XHCI => Drivers/TTY
Comment:
Actually the real culprit seems to be this:
https://github.com/haiku/haiku/blob/master/src/add-
ons/kernel/drivers/ports/usb_serial/SerialDevice.cpp#L91
Since this create_area is called in the kernel, it will be mapped into the
kernel address space but with user-writeable permissions; thus
IS_USER_ADDRESS will return false and the USB stack will not use the user
functions to access it.
AFAICT, it is not used outside this driver or passed to user-space, so the
solution seems to be to simply change it to be mapped in the kernel only.
PulkoMandy, can you confirm this is correct?
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Ticket URL: <https://dev.haiku-os.org/ticket/15172#comment:13>
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