--- Comment #20 from commit-h...@freebsd.org ---
A commit references this bug:
Date: Sat Jan 13 21:39:46 UTC 2018
New revision: 327948
Fix possible panic when creating VirtIO console dev aliases
Since we have no control over the name, the MAKEDEV_CHECKNAME flag must be
used to return an error on an invalid (to devfs) name instead of panicing.
r305900 that originally added this feature also introduced a few other bugs:
- Proper locking not performed
- Theoretically broke the expectation that the control event buffer would
not span more than one pages, but did not update the CTASSERT that was
in place to prevent this. However, since the struct
and the bulk buffer together were quite small, this could not have
Also workaround an QEMU VirtIO spec violation in that it includes the NUL
terminator in the buffer length when the spec says it is not included.
MFC after: 1 week
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