The r317143 broke cd(4) announcing at system boot time. It looks like this:
cd0 at ahcich1 bus 0 scbus1 target 0 lun 0
cd0: <HL-DT-ST DVDRAM GT50N LT20> Removable CD-ROM SCSI device
cd0: Serial Number M36C37K4101
cd0: 150.000MB/s transfers (SATA 1.x, UDMA2, ATAPI 12bytes, PIO 8192bytes)
Note the last line. I believe it's because it uses sizeof(announce_buf),
and it's a pointer now, not a table.
Proposed fix in https://reviews.freebsd.org/D14369.
A commit references this bug:
Date: Wed Feb 21 14:05:13 UTC 2018
New revision: 329708
Use proper buffer length (the announce_buf char pointer used to be anarray),
broken in r317143. This fixes those weird "cd0: Attempt" messages at boot.
Reviewed by: scottl@
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14369