https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203319
Bug ID: 203319
Summary: Invalid setting of comconsole_pcidev in loader.conf
can lead to loader BTX halted
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Found through experimentation. If one sets the following in a loader.conf in a
net boot nfs environment:
console="comconsole"
comconsole_speed="115200"
comconsole_pcidev="0:22:3"
If the loader is unable to find the pcidev (like you're booting multiple
devices from the same nfs boot environment), loader will panic and a BTX halted
message will be displayed on the video console.
The serial port will emit one error message of "Invalid port" on a COM0 if the
system has it. This seems to indicate that comc_pcidev_handle() calling into
comc_port_set() isn't gracefully handling the error.
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